OFF-GRID HOME
If you’re still holding on to a 20-year-old refrigerator for any reason, you may be using 1,700 kWh of electricity each year instead of just 450 kWh. If you combine this with an energy-guzzling AC and a plugged-in pool, your needs cannot be met by a backup battery.
Additionally your fridge might need 450 watts to keep it running, but 4 times that amount just to start it. To have a clear picture of just how much energy your appliances use, add it up or use home energy monitors. The fewer gadgets you need, the more likely that your entire home can run on a backup battery.
COST OF BACKUP BATTERY
The maintenance cost of a backup battery system is little to none. However, the upfront costs of a backup battery are high- $10,000 to 20,000 – and may keep many people from getting one.
A typical lithium-ion battery system cannot run a house through a night of power blackout. These systems don’t have sufficient power to run many appliances either. Although these needs can be met by buying multiple batteries and inverters, it is not economically viable to buy inverters with more than 20 kilowatts of power or over 40 kilowatt-hours of batteries.
However, you can power your home with a battery by avoiding AC, some chargers (240EV), and stoves. Work with between 4 to 8 smaller circuits to keep your fridge running, light the home, communication and entertainment.
SOLAR-COUPLED BATTERY BACKUP SYSTEM
However much energy you need, a well-designed solar backup battery can match up to your needs when you get one with particular characteristics.
For example, the kilowatt-hours and the inverter output should be matched to the needs of the home when the battery is partially discharged. You should limit the number of circuits to discourage plugging in too many devices, and the solar system should be big enough to partially recharge the backup battery even on a gloomy day.
You can also use smart controls to automatically disconnect appliances that use a lot of energy or smart electric panel tech to manage every circuit in your home.
