Solar question

[Perry Butler]

Originally Posted by Brian B-P

True. Fortunately, if there is negligible current flowing in the wires between the outlet and the battery, then there is also a negligible voltage difference, so this is a perfectly good way to measure battery voltage, as long as you are not using other devices on the same circuit when checking. Of course battery voltage is not an ideal indication of the state of battery charge.

Agree. We find our cheap, ten year old, plug-in battery monitor is never off the Victron 712 battery monitor reading by more than .1 volt.

For a true reading, SOC, you should wait until 2-4 hours after the sun goes down. Although nothing is perfect.

Enjoy,

Perry

[John in Santa Cruz]

If the battery is in decent condition and you know the approximate temp of it, voltage at rest (!) gives a very good charge state indication

[godspeed]

This seems to work fine if you are challenged installing 12v ports, inverters etc. The solar panel can charge this battery bank and then you can plug in your phones etc to charge them 240 watt hours. $150 on Amazon.

https://www.amazon.com/Jackery-Porta...GGVZ5FMF9K443V