pianotuna wrote:
I use a volt meter but agree that it takes an extremely long time to recharge. I'm in a class C and have beefed up the charging path, as well as doubling it.
Part of the problem is the engine controllers (ecu) "sees" the starter battery and reduces charging based on the voltage of it. There are ways around this but they require lots of effort as well as modifying the OEM alternator.
I've gone solar instead.
A voltmeter can only measure the surface charge of a battery and is NO indicator of the state of charge. If the voltage is less than 12.6V then the battery is discharged but the voltmeter will not tell you how far below a full charge. And a reading of 12.6V doesn't always indicate a fully charged battery. Again, only load testers can answer that question.
