I have a 800ah battery
bank that is maintained by solar panels
and a trace C40 charge controller.
i have two 245ah, 1 198ah and 1 90ah in the bank
Last time i came to the boat the battery
bank was very low and the boat barely started. Running the engine
for hours did not help so I tested each battery and found one bad 245ah unit. i took it out the circuit and now everything appeared to be working, the remaining batteries taking a charge. I use the boat for a week no problems. Now I leave the boat and solar
panel on to maintain batteries (as i have for years).
A month later i come back and ALL the batteries are bad. none will hold a charge. when disconnected to test, one measures 9v one 4v one is at 11V but wont hold a charge.
They were all installed 6 years ago.
system is definately putting out a charge.
Is it strange that all the batteries have gone down at the same time ? did the first bad battery ruin the rest ?
Before i buy a new very expensive set of batteries, i want to know if they just reached the end of there life or do i have a charge problem with the solar panels
. How would i test it.
i have searched posts but not found any conclusive info.
Any help deeply appreciated. I am stuck in Green Turtle Cay till i figure it out.