Simple way to measure coach battery capacity
I'm looking for a reasonably simple way to measure the current capacity of the single coach battery in my newly purchased (used) RV. I have a basic voltmeter which I don't think will be much help, ...
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If you just want to know what the battery SHOULD provide, just look up the size and look at any rating, you'll be close.
Your method of testing would work fine.
I don't have a Kill-a-watt, but I have a Voltmeter and Ampmeter. I am in the process of testing my 2 GC's, using an inverter and a slow cooker to load at about 11 Amps. Checking and recording voltage and current draw every few hours, will give me a good approximation. They're 8 years old, and a few years ago they tested at 80%. We're getting ready for a couple of months on the road, and rather than trust to luck, figured I ought to test them.
Doug
Your method of testing would work fine.
I don't have a Kill-a-watt, but I have a Voltmeter and Ampmeter. I am in the process of testing my 2 GC's, using an inverter and a slow cooker to load at about 11 Amps. Checking and recording voltage and current draw every few hours, will give me a good approximation. They're 8 years old, and a few years ago they tested at 80%. We're getting ready for a couple of months on the road, and rather than trust to luck, figured I ought to test them.
Doug
