This is kind of related.
I have 4 Trojan 605s that the PO said he had just installed. They look to be in good condition and the fluid is topped up. The issue is that when the charger
is running they show roughly 14 volts. The charger
will do its thing and then go into float mode, leading me to believe that they are fully charged. When I remove the shore power
the batteries drop to roughly 13.3 volts immediately, and then work their way down to 12.5 to 12.3 about 5 minutes later. When the refrigerator
is running the load on the batteries is about 9 amps and then 4 amps when it's off.
Should they be doing this? I ordered a hydrometer so I can equalize the batteries, but it won't be here til next week.