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HeatSpring PV Course Blog

Battery Backup PV for a Fridge


Q:

Personally for me, solar with some sort of backup is a must - at the least just to keep refrigerator running.
Sean, in your opinion would your backup generator be LP or diesel??

A:

It depends on a lot of factors. If you already have gas coming to your house LP or natural gas makes it easy.
If you are running a generator a lot, then diesel is the way. If you are a hippie, then you can use biodiesel.

The SMA inverters that have backup without batteries are neat. They call it SPS secure power supply. They only work when the sun is out, but can power your fridge during the day and if you don't open it much at night, that can be enough. You can also put gallons of water in the freezer and then place them in the fridge when the power is out. This option does not cost much more.

Many people want to do battery backup, but change their minds when they discover it will cost $10k more or more.

Thanks,
Sean White


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