Dashboard Alternator light
Hi all, The MPPT controller on my coach will deliver 14.6 volts in bulk mode which is fine. In fact it’s exactly what the specs on my GC2 house batteries call for. But when I turn on the engine and...
Forum Discussion
First test.
I ran the batteries down a bit and then plugged in the coach to shore. I have a PD converter and I let it bring the batteries back. When the starter battery was at 14.3v started the engine. That brought the voltage down to about 14.25. I couldn’t get the voltage back up. I suppose if I idled for a while I might have been able to raise it. The current was at about 6 amps. The dash alternator light didn’t come on.
It’s still too hot here to uncover the RV, so I was using the converter/charger to simulate the solar panels. What I think I learned is that the PCM is tolerant of voltage above 14.2. So right now I think if I change the profile in the controller so that it never goes above 14.2v I should not see a light.
I ran the batteries down a bit and then plugged in the coach to shore. I have a PD converter and I let it bring the batteries back. When the starter battery was at 14.3v started the engine. That brought the voltage down to about 14.25. I couldn’t get the voltage back up. I suppose if I idled for a while I might have been able to raise it. The current was at about 6 amps. The dash alternator light didn’t come on.
It’s still too hot here to uncover the RV, so I was using the converter/charger to simulate the solar panels. What I think I learned is that the PCM is tolerant of voltage above 14.2. So right now I think if I change the profile in the controller so that it never goes above 14.2v I should not see a light.
