The Solar Powered Home with Battery Backup

It’s not a requirement, but an increasing number of homeowners are interested in battery storage as an add-on to their solar panel system. A grid-tied solar panel system, without batteries, will be deactivated in a power outage. A battery system works like a generator – except without any fossil fuel and without any noise! They will turn on automatically when the power goes out.

How much battery do you need?

A battery usually only supplies “Critical Loads” – well pump, refrigerator and/or freezer, some lights, and backup heat (that’s why it’s a good idea to have a low-electric backup unit like a pellet stove or wood stove in a mostly all-electric house – heat pumps will deplete a battery QUICKLY)

SOLAR BATTERY WORKSHEET
List of loads, Watts Used, Hours Used

Well Pump
TV
Refrigerator, etc.

Come up with kWh Total at end and compare that to various Battery options.

To Chapter 6

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