Power outages can occur without warning which disrupts normal activities and creates major difficulties for residential areas. The loss of electrical power which arises from extreme weather conditions or grid breakdowns or unexpected emergencies shows the extent to which contemporary households depend on trustworthy electricity. Home emergency power systems provide essential protection because they deliver continuous energy supply throughout these emergency situations. The guide presents an in-depth analysis of backup power solutions which enables you to learn about their operational systems and their advantages and their process for selecting the ideal power system that matches your requirements. The article will provide you with all the necessary information to protect your residence while you achieve peacefulness during power outages.
Understanding the Need for Backup Power Systems
The Importance of Emergency Power
Emergency power systems are essential for sustaining vital operations during times when electrical power is disrupted. The systems provide electrical power during periods when the grid system fails which enables people to continue their daily activities while using essential devices like refrigerators and medical devices and heating equipment. The system becomes essential when extreme weather events and natural disasters occur because extended power outages create dangerous situations that endanger both human life and property.
The systems establish operational stability for businesses and institutions because they stop data loss while their security systems keep working and their staff members continue their work. Healthcare facilities require emergency power systems to operate essential medical devices and protect their electrical networks. Businesses experience less operational downtime because they can rely on backup power which enables them to continue their activities while protecting employee positions.
Multiple factors determine which emergency power system to choose because organizations must assess their expected outage periods and their energy needs and their available financial resources. The available systems include portable generators which provide power for short periods and standby systems which can supply electricity to complete buildings. Home and business owners should assess their power needs while testing system performance to guarantee their electrical systems will function during power outages.
Common Causes of Power Outages
Power outages can happen for many different reasons, both man-made and natural. The leading among them, in that race, is extreme weather, which includes hurricanes, rain or snow storms, high winds and in some cases ice storms are known to either bring down power lines or destroy transformers and substations. This sort of weather should be considered in the change of circumstances because it is a very big cause of electricity disruptions, especially for those places where the weather is thought to be very severe.
Another major contributor to black outs is the breakdown of components within the power grid. Often the electric wires develop problems due to reasons like lack of maintenance, decrepit infrastructure and or the power lines are running on an overloaded system. These challenges are acute in the event of high dmand for power because this demand is usual during summer and winter spellsin case of high temperatures or low temperatures that are below freezing.
Lastly, the instances of power outages may also be external in nature, or caused by accidents. Such as when a vehicle crashes into a utility pole, if wildlife comes into contact with electric currents due to transformers, or in case of human errors when servicing electricity transformers which may result in the power black out. Furthermore, the cases of breach of electricity systems through cybercrimes are low, but those of terror attacks are on the up-trend hence the concern for security of the power systems. Simplification of these causes is important in order to establish protective energy systems.
How Backup Power Systems Can Help
Electrical power outages are controlled with assistance from the backup power systems, mainly designed to maintain the continuity of supply of energy. Should the main power grid fail to deliver, backup sources are used and are often standby backup generators and backup power sources, UPS and batteries. For instance, on-site emergency generators are used that have an automatic transfer switch enabling connection to selected loads in the event of a power failure or to the entire building if the system is appropriately sized. Also in use, UPS’ will provide regulatory power to the system to accommodate interruptions not exceeding a few seconds or perhaps until the bigger systems are brought to life.
Backup power systems are often considered a great asset with regard to protection of key functionalities that are more critical in industries like healthcare, data centers, and emergency response, where uninterrupted power is highly desired. For instance, in hospitals, standby power systems are used to maintain the operation of the life support and critical care equipment, which is essential to the safety of patients; they are there to prevent the facilities from collapsing and causing fatalities. These facilities are fitted with these systems to ensure that the critical servers are secure, as well as prevent the collapse of communication systems. This guarantees the operation of the business activities as the possibilities of high downtime chances are minimized.
Moreover, back-up energy systems contribute heavily to the general notion of resilience by reducing the negative consequences related with power outages in different industries, homesteads and infrastructure. At this time, contemporary backup systems propulsion is emerging, where applications power lengthy grid power storage devices from renewable sources. Besides, with these technology capabilities availed in the market, such systems can be harnessed, connected with the various energy systems regarding the community and organization under normal circumstances and use the backup systems to ensure energy availability during such tough times instead of excessive load shedding.
Types of Home Backup Power Solutions

Standby Generators
Standby generators are generating sets that are fixed in place and are made to supply electricity in case of a blackout in a structure or premises. Normally these systems typically are supplied with gas or propane and are made to be connected to building’s grid through a transfer switch. Modern generators have the means to detect power loss and switch on in a matter of seconds ensuring very little interruption of the most sensitive electronics and machines.
According to current data from different suppliers in the standby power range improving power range. Including power that is ideal for residential use, there are set gensets that give power from the lowest rating power 7kW to the upper rating of 20kW, depending on the user’s energy requirement. For houses a standby generator with ratings of around 10KW to 15KW is large enough to provide essential loads such as heating, cooling lighting and a few select appliances. Any larger capacity is most suitable for big residential homes or commercial buildings that require heavy electrical loads.
Advancements in technology have led to improved generator performance over the years. With the advancement in modern technology, there have been a vast number of generators that help optimize fuel utilization at the same time making the operational noise lower. Without this and other such load management technologies, the level of heat and electrical noise one serves its target environment can create a lot of discomforts. Users of standby generators will definitely outline their advantages in these terms.ynchronous generators’ reliability, cost-effective maintenance and ability to withstand adverse environmental conditions makes them the perfect solution for continuity of supply in systems experiencing extended series of grid interruptions.
Portable Generators
Compact and mobile power sources called portable generators are very useful because these devices were specially developed for temporary or some non-static loads. The following systems are made to provide and ensure convenience and adequate power for the compact size of the systems. This is simply because they have an implicit system that comprises power outlets that have switches [,,,]. The devices This equipment mainly use engines for their creating and production where as most use gasoline, diesel or gas to create/pull power. These, therefore, have provided the rare capability to generate electricity on small merchandise in homes. The potential maximum power of a generator is between one and ten kilovolts. This means that these generators are enough for most applications – as well as for businesses, technical means and even recreational purposes.
Most current portable generators are offering leading-edge functionalities aimed at boosting its effectiveness, ease of operation and overall product safety. To give a straightforward example, the majority of the top-notch units that are available today are compressor-based some of them are powered with inverter technologies to provide high-quality and stable power that can be used on sensitive devices such as laptops, medical equipment, and communication devices. Recent times has seen the surge in technology and this has resulted in noise reduction technology such that many generators are coming up with operational sound as low as 60db and below which makes them more friendly to operate in homes and for leisure. Some additional features such as electric start and fuel level gauges also help in ensuring that the equipment is easily manageable as well as assists the operator in running the equipment with consideration to disputed rate of the fuel. The other special characteristics that have come along today are remote controls, ideally introduced through applications which allow the user to operate the generator from other places as well as provide trouble shooting and even monitoring the performance of the generator.
Although there are advantages of owning portable generators, there are important aspects to be consider. It is mandatory to offer fresh air for the machines, as they release hazardous carbon monoxide gas as they operate hence, when put in close rooms, prevent any complications from developing. Over and above the warning, additionally advised is how to conduct preventive practices such as regular oiling, removing any dust in the air filters and examining the workability of the generator’s spark plug. There is also the consideration of storage of fuel as well as its availability especially in cases of power outages for more than several hours. Even though generators are not designed to be used continually, the reasonability and the simplicity of handling of the modern generators makes them a good choice in situations where power is cut off for a short while.
Solar Generators
A solar generator or solar power generator, to be exact, captures power from the sun through solar panels, turns it into electricity, then collects it into lithium-ion or lead acid built in batteries for later applications. Solar power is a modern technique that has seen widespread use due to various reasons. Subsequently, the cost and modification measures in active solar energy systems have served to improve the public perception of solar energy applications. Without considering current fuel driven generators, solar generators are beneficial in the aspect that they create zero pollution hence they are clean energy sources that reduce greenhouse gas emissions.
Target solar units’ acute performance includes items such as the would-be battery energy storage capable of storing power for a certain period in the watt-hour unit, output shall be that of the inverter in watts, and how efficiently energy can be input in other words the charging efficiency. This many are improved lately due to the integration of the MPPT technology that works to enhance the power generated from the solar panels. This therefore means that they are capable of accommodating many devices – from general use applications like household equipment, and IT complementary tools. They also have been made more interactive with the introduction of easy to use technologies, mobile application systems that can perform remote monitoring and they normally operate quietly making them quite to operate all the time.
It is recognized from the most current and up to date survey results that the market demand is trending towards higher capacity battery systems tailored for home backup and off the grid applications where some units have capacity in the range of 2000 watt-hours. However, most people will be unwilling to invest in such a solar power generator before trying the effectiveness of a gasoline powered generator and, hence, will prefer to change to this type of energy upon ascertaining that the former is more efficient in terms of economy. Change is good, though, and after years of growth and development, solar energy seems to be the best option, that saves money, and is equally good to the environment.
Choosing the Right Backup Generator

Assessing Your Power Needs
Assessing the power consumption to figure out the right backup generator involves installation of certain trends. One way to do it is to list all the devices that need to operate in the case of a power outage. Such equipment will probably include refrigerators, heating/cooling systems, light, medical devices, communication tools, as well as motor or electric tools. Once the list is ready, the wattage can be found by adding up the starting wattage and running wattage of the device. The starting wattage is used in this case because it is always higher than the running wattage which takes into account the surge of energy that is required to switch on the equipment like fridges and air conditioners. The estimated wattage tough can be found on the device or manufacturer manual. For safety, always add an extra margin of 20-25% in the estimated total to avoid failing in case another energy constraint rises.
Duration and frequency power outages that the place faces needs to be evaluated by looking at this aspect. Localities that have constant weather oriented power cuts may have a need for larger generators with few additional features. Most important things like fuel efficiency, the type of fuel, that is either solar or gas or diesel or even propane, available, noise and the weight shall also be considered. These are the solar Generators that in operation very well in such cases where constant power is not necessarily needed and noise and eco-friendliness are substantial. As opposed to other types of generators, those run by diesel may be more useful for heavy industry due to being resistant to frequent breakdown and providing significant power. The climate of the area should also be taken into account; the cold weather settings will demand generators that are particularly designed for such harsh conditions.
When your electricity requirements are established and your surroundings known, it is essential to consider the future when it comes to extra supply or power upgradation. An auxiliary power source which fits the consumer’s current specifications but has very little room for expansion could fall out of use should the appliances in the house or business that ones are employed in, expand. On this bases, such features as the possibility of adding an EV, improving the heating system or installing an air conditioner will increase the lifetime of the power supply. By conducting such a comprehensive evaluation, it is possible to select the appropriate generator that is tailored to the energy characteristics of the end-user, system limitations and the budget, and will guarantee uninterrupted power supply when the need arises.
Comparing Diesel vs. Gas Generators
Diesel generators are fuel-efficient, durable, and require less maintenance, while gas generators are cost-effective, cleaner, and have a consistent fuel source.
|
Key Point |
Diesel |
Gas |
|---|---|---|
|
Fuel Cost |
Higher, fluctuates |
Lower, stable |
|
Maintenance |
Less frequent |
More frequent |
|
Durability |
Long lifespan |
Shorter lifespan |
|
Efficiency |
High fuel efficiency |
Moderate efficiency |
|
Emissions |
Lower CO2 |
Cleaner, but more CO2 |
|
Safety |
Less flammable |
Explosive risk |
|
Size |
Compact |
Larger |
|
Fuel Source |
Stored diesel |
Connected gas line |
Features to Look for in a Backup Power System
Considering the composition of the system and characteristics of the application, various major aspects must be accounted for in order to ensure satisfactory performance, reliability, and energy characteristics:
- Power Output and Capacity of the System: It is of great importance to assess the power output of the generators in Kilowatts (KW) to ensure that the amount is not more or less than what is required in a house or facility. When critical measure of start (surge) and running wattage of the appliances are summed up the total wattage needed, enough wattage intake should be available in order to help in the management of the sinks.
- Fuel Type and Availability: Many Foodable Rreports that backup generators are, in most cases, powered by diesel, natural gas, propane, or gasoline, like most gasoline burn engines. However, each of the available fuels has been accepted, with diesel being the most efficient and can be stored for quite some time, whereas natural gas is mostly preferred through utility lines because of its constant supply. Some of the other factors to consider are the fuel storage, fuel availability within a shopping area, and its adverse environmental effects to the best possible extent available when any of the above is selected.
- Automatic Transfer Switch (ATS): A professional-grade Automatic Transfer Switch or ATS for short is necessary for effective guaranteeing always-on power supply. It monitors power interruption and transfers the load to the backup generation set without human interface thereby keeping the halt short, especially in critical operational areas. Compliance with permissible sound levels is another issue that might arise.
- Dimensions, Mobility and Setting Up: First of all, rate unit’s physical dimensions and weight as well as purpose of usage in stationary or portable condition. Stationary power supply systems are installed by highly specialized personnel and are suitable for permanent deployment, while portable, energy generating facilities provide freedom of action and may not be as powerful.
- Durability and Build Quality: The service of generators is dependent on whether they are made of the right material and are resistant to adverse climatic conditions. Check if it is made from materials that don’t corrode and does not possess engine components that are of cheap quality.
- Smart Monitoring and Connectivity: Nowadays, every corporate generator of electrical power usually comes with some kind of wireless monitoring over both a cellphone and web-based apps. This helps in knowing how far the performance has come, fuel levels and any other affect is conveyed in real time and hence increasing efficiency as well as reliability.
- Compliance with Safety Standards: Ensure the generator is made with standards like safety certifications such as UL (Underwriters Laboratories), or CSA (Canadian Standards Association). Overload protection, low oil shutdown, and circuit breakers, these are among the features that ensure safe operation of a system.
- Product Warranty and Support Services: It is important to look into the warranty stated by the manufacturer, the cost of replacement of all parts in case of failure, labor and such other charges and not forgetting the availability of customer care and services from authorized agents. It is very handy sociology to have some assurance that the product is safe and secure assistance is available even when the worst happens.
In addition, these features go a long way in ensuring that an appropriate power systems is meant for a specific work and environmental condition, hence uninterrupted services will be provided while one has that peace of mind.
Installation and Maintenance of Backup Power Systems

Professional Installation vs. DIY
Professional installation ensures safety, compliance, and warranty protection, while DIY offers cost savings but risks safety and warranty voidance.
|
Key Point |
Professional |
DIY |
|---|---|---|
|
Cost |
Higher upfront |
Lower upfront |
|
Safety |
Ensured |
Risky |
|
Compliance |
Guaranteed |
May lack |
|
Warranty |
Protected |
Often voided |
|
Expertise |
High |
Limited |
|
Flexibility |
Contractor-dependent |
Full control |
|
Time |
Efficient |
Time-consuming |
Regular Maintenance Tips for Generators
To reach the highest extent to which it is utilized and especially to increase the life expectancy of the engine, it is vital for every owner to operate in compliance with existing preventive maintenance. Below are numerous maintenance measures that apply to selected components and systems of the generator:
- Checking Oil and Filters: Regular monitoring of the volume, refilling engine oil every 20-, 100-, or 300-hour period and replacing of the lter for every 100-, 300-, or 500-hour usage of the generator.
- Replacing the Air Filter: The air lter gets dirty with leaves, soil, and other materials in the air blown to the unit after some time. Purpose of an air lter is to provide conditioned air to the engine in order to optimize the gasoline consumption and thus reducing pollutants.
- Cooling System Servicing: It is necessary to monitor the level of the coolant-menstruum in the liquid-cooled DO generators, as it will need maintenance. Any substance flush and subsequent refilling using the recommended coolant mix proportion is vital to prevent overheating and other malfunctions in order to keep the working conditions as required. It is necessary to avoid overheating and maintain heat balance in all possible ways.
- Battery Checking and Care: Confident battery care plays a key role in the start-up of generators. Ensure regular checking of the voltage and connections as well as removal of any accruing dirt as well as rust from the terminals. Change the battery if such need arises, after every 2 to 3 year’s usage because of fatigue/ because of non- optimal service conditions.
- Fuel System checking: Evaluate the whole fuel system like checking for damages in the fuel pipes, fuel tanks or even the fuel blockage in any of these components. When using diesel or natural gas generator sets from, ascertain that impurities are absent in the fuel and re-supply it before it inhibits the fuel over time.
- Spark Plug Maintenance: The replacement and repair of a spark plug in an Electro-saving gasoline generator is necessary every certain period (time). In a situation where the spark plug is worn out and the electrodes are consumed, lake or look as though they are no longer in a position to deliver jerks or in some cases feel cold as in a case of an engine skipping. A misfiring due to a damaged spark plug can lead to a decreased performance of the engine.
- Exhaust System Monitoring: Inspect the exhaust system to check for any blockages or faults which may lead to extreme emissions or degraded performance of the system. Make sure exhaust gases are properly removed from the occupied zones.
- Cleaning and Lubrication: Dust off the generator to keep it free of grime and up from dust etc, such as those that may cause overheating. It is also important to apply oil to all the parts that move e.g. fan belts and hinges in order to make sure they work properly.
- Load Testing: It is important for the load tests to be conducted on the generator so that the functions can be examined in the field. This is helpful for determining what other issues may arise in case of an emergency.
- Manufacturer-Specific Guidelines: As much as possible go through to the manufacture of the article and find the factory specified instruction book which contains, among other things, the value of the necessary bolts and time.
Taking these measures and following proper maintenance procedures will not only elongate the life span of your generator but also prevent unpleasant surprises when it is of utmost importance. Planning ahead and having professional checkups done once every year can also reduce the vulnerability of the system.
Testing Your Backup System
The backup system, primarily backup power, should always be tested to determine that it does not let you down when a time of need comes. Starting with the manual command start in accordance with their instructions. This involves switching to emergency mode as if a power failure occurs. As per the user’s manual, lookout for the operation of the generator in an automatic mode, this will be the case if there is an automatic transfer switch in place, and for voltage delivered falling within acceptable levels.
In addition, the operation of the generator must be tested under light, average, heavy, and even maximum loads to determine the intensity that it would take you. Therefore, the generator should be hooked up to a load bank where is the work is the way it is likely to be in practical applications. Monitoring of such full load parameters as voltage, frequency and engine temperature may reveal defects.
For more effective tracking capability, harness diagnostic software and/or on-board monitoring systems to monitor and compile critical operational data. Those technologies enable the user to track fuel consumption, operating hours, wear of internal components among many other parameters hence improving predictive maintenance approach.
Last but not least, be sure to keep records of every test/inspection done over the site. Record-keeping helps in monitoring the performance of the system over time and serves as a guide for those who wish to carry out an annual professional assessment of the site. Moreover, frequent testing is crucial to make sure that all emergency power sources are ready and operational when emergencies do take place.
Cost Considerations for Home Backup Power Solutions

Initial Investment vs. Long-Term Savings
Initial investment in home backup systems is high, but long-term savings come from reduced energy costs, reliability, and independence.
|
Key Point |
Initial |
Long-Term |
|---|---|---|
|
Cost |
$5K-$20K+ |
Reduced energy bills |
|
Savings |
None upfront |
Significant over years |
|
Reliability |
High setup cost |
Consistent power supply |
|
Independence |
Grid-dependent |
Energy self-sufficiency |
|
Maintenance |
Professional required |
Minimal ongoing costs |
Budgeting for Installation and Maintenance
When estimating the cost of installation and regular care of the household power supply back-up system, it is essential that one factors in all costs that will be incurred, expenses that presently seem nonexistent. The cost to be incurred towards the initial set up comprises the cost of the generator as well as transfer switches and any other conforming devices to the domestic electrical system. Other costs to be incurred are those of Push button/ circuit box type of generator which depends on the geography and complexity of the house. 5 ton roof pimp tension generator is installed for between 5,000 – 10,000 dollars in general. There maybe extra highpriced undertakes for larger or more knowledge requiring services.
Another point to keep in mind is how much it will cost to keep the machine working. In order to maintain the machine, tests, oil changes and the replacement of faulty machine parts should be carried out. The maintenance service shall be offered after every six months for reasons that are reasonable. It is highly common that the cost of such service provision can range between $200 – $500 depending on the number of brand models with a few better known and more effective models. Moreover, fuel storage costs or refill costs to a large extent depend on the type of generator used, such as NG (natural gas), diesel, propane and intensity of its usage. Shelter among many other features speaks to design to which customers must add resources for maintenance and operation so as to ensure that the intended use of the solar equipment is realized.
An extended warranty or a maintenance contract can be taken out to ensure that maintenance for such a generator is only scheduled on a fixed costing basis thus saving in the end. There should be a dedicated account or an area within the budget for such instances which is not planned in advance. This may seem like an obvious project, but underestimating the risks of designing an over-charged solar system can lead to severe over-exploitation which may certainly not be reliable in the long run particularly when forcing the systems to supply a lot of energy for back up power. Besides, the plant will be designed with multi-country electronics and hence the will require extra layers of all weather exposed temperature related performance computers. In achieving these criteria to justify the need for solar electric gadgets, logical yet sometimes fail to muster a strong enough argument that installers fail to recover this ratio of investment through interest paid for solar projects.
References
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Residential Emergency Backup Power Supply and Hazard Detector: Discusses UPS systems for residential use and their applications in older homes.
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Solar 2007: Florida’s Emergency Shelters Go Solar: Explores the integration of solar power in emergency shelters, including emergency power systems.
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Measuring and Enhancing the Resilience of Interdependent Power Systems: Examines the resilience of power systems and their interdependence with emergency services.
- Click here to read more.
Frequently Asked Questions (FAQ)
Q: What exactly are home emergency power systems, and do they bear any disparity with power stations that are portable?
A: Home power systems are systems that are set up to provide electricity from any other source when grid power fails. They can in short be divided into the full installation and also to smaller, portable emergency power stations, which are suitable for specific needs of the people. On the contrary, a portable power station is, for instance, A use of a portable AC or DC power source like a rechargeable lithium battery or a rechargeable lead-acid battery is typically so that it Power only necessary appliances or parts of the house before full power can be restored. Permanent Backups or Whole-home Generator on the other hand is intended to cover the entire house. Heating and cooling systems, kitchen appliances cooking laundry and so on heat for an extensive period of time fall under the examples of coverage.
Q: What is the comparative efficiency of the battery backup system (including LiFePO4) for domestic use versus that of the electric generators?
A: There is no doubt that ‘personal power plants’, also known as battery backups, make an excellent eco-friendly alternative for domestic purposes. Lithium-ion phosphate or LiFePO4 batteries create a good, quiet power grid that generates continuous, reliable and noiseless power supplies to essential loads and other electronic appliances within a home. Home backup generators, particularly of the diesel-LPG-gasoline-electric generation system, enable the provision of strict priority power supply followed by whole house power support while they will remain well serviced and kept in proper working condition. In many circumstances, the most beneficial way to provide backup power is to combine battery backup for supplying critical loads with a generator for whole house use.
Q: Will a home battery backup and generator system be able to power a cooling system and other crucial home appliances?
A: Definitely, a properly installed home battery backup system can manage air conditioning systems, refrigerators, or even sump pumps and some basic appliances during the blackout. Capacity of the batteries as well as the inverter size will determine if the system can bear heavy inductive loads such as HVAC. The better way to achieve this is by using either very high performing batteries (eg. similar to the yeti 3000x) or by interfacing batteries with a generator for restricted power for essential areas in the house.
Q: What should I consider when calculating backup power needs for home emergency power systems?
A: Mix questions that comes to mind when these structures are completed and available for use are as follow; The room will eventually be utilized by the patients, What is the control limit for intervention, and To what extent will the patient’s training be functional?. Figures might also be used so as to properly represent the aspects discussed and context of such figures as components of WBS, internal logic and cross-sectional as well as external WBS to indicate the scope and progression aspects of the project. Once the foundations of the number and name of deliverables have been developed, they should be described and presented in chapters for further practical use.
Q: Besides the current recession from the ongoing Covid 19 lockdown, to what extent do you have actual customers’ demand?
A: Whole house backup devises like those from Generac have a design which is meant to give permanent automatic backup power and also provide electric power to most or all home circuits when the need arises. Users have the option of selecting either portable devices or intrinsically safe battery reserve spheres within the dwelling which result to maximized energy use. A combination of both battery backup and generator systems is significant in long power outages where both instant and extended power are necessary to achieve the end result and that is to have power at all times when outages happen.
Q: How does this work in terms of emergency preparedness for off-grid systems and goal zero home style setups?
A: Most off-grid systems aim to enable autonomous operation of the entire home with solar arrays, (commonly installed!) and battery banks (mostly LiFePO4) used with inverters to make a complete, self-contained electricity power generation system. Properties or regions that experience frequent power outages or are remote may find these systems useful as they provide efficient power and flexibility; emergency and disaster considerations can be added as per the requirements of the installation. In some cases the systems are first meant to take care of the basic or critical requirements such as lighting a few electric accessories before a bigger system is installed for whole house use. Often these bigger systems can be operated alongside alternated operation with the small system for example through use of a combination of the system and a generator.