Battery down to 9.7v ??
We have one 12v battery in a travel trailer. After driving for 5-6 hours on Friday, we boondocked in Texas. 40s at night, 50s during the day. We only used 1 led light in the evening and the water pum...
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The voltage on a battery is overly optimistic after charging. Wait a few hours after any charging to measure voltage and use the 12V side of life voltage chart that says 12.0 is 50%, 12.6 is 100%. As an example, my batteries have been disconnected since September and still read over 12.6 V.
If you want to more accurately and conveniently see the state of charge, get a battery monitor that counts amp hours in and out.
If you choose to buy regular batteries instead of AGM which don’t like low temperatures, I recommend the Costco ones that say Deep Cycle on the side. Mine are 6 years old and still excellent. This time I’ve kept them over 80% charge with solar and engine charging. Never plugged in or used a generator.
If you want to more accurately and conveniently see the state of charge, get a battery monitor that counts amp hours in and out.
If you choose to buy regular batteries instead of AGM which don’t like low temperatures, I recommend the Costco ones that say Deep Cycle on the side. Mine are 6 years old and still excellent. This time I’ve kept them over 80% charge with solar and engine charging. Never plugged in or used a generator.
