A voltmeter cannot tell the % of full charge because any load diminishes the voltage, any charging increases the battery voltage for at least an hour (I’ve seen well over 13 volts two hours after a short drive in our class C - does that mean it’s over 100% charged?). Why not go straight to a monitor that counts amp-hours going in and out and always displays the per cent of full charge?
Here is one for $40. Some basic knowledge of current and voltage needed to install.
eBay.comOh no, I'm infected with that Captcha bug putting up CloudFlare error messages. It happens on ipad Safari and Windows 10 Firefox for the first time tonight. Impossible to post!
