I use a marine AGM battery, inverter, trickle charger and transfer switch. I bought pretty decent equipment so the set up cost about $1000 but it gives me piece of mind. I don’t have to be home, if the power goes out, whatever I have hooked up to the battery stays on with no interruption. The longest it’s run was 24 hours and the battery was only about half drained - that’s with two gyre pumps and a 150 watt heater running. I’m guessing with no heater the battery would run the pumps alone for several days.
When I priced this out, I found you could build this for closer to $300-450.
Considering how much people spend on livestock, this kind of battery back up is cheap. Mine has kicked in 5/6 times this year and I don’t have to worry about anything. It can be a little hard on the battery but oh well, it’s back up.
Like working with any electricity, know what you’re doing before taking on these projects.
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