Charging a Battery Bank
I am planning on upgrading my batteries to 4 6v batteries wired in series and parallel to have a 12v system with plenty of Amp Hours. There is a ton of information on how to wire things up but nothing...
Forum Discussion
Good news that you were able to recover the batteries according to SG. Of course you still have to prove them by loading them and seeing if they stand up to that, but fingers crossed.
For the battery gurus-- I am unclear how you can use equalize level voltages on the batts when they are not fully charged. In this case they were near dead flat. So what is that all about that you can only equalize a full battery?
It appears the near dead batts needed the high voltage to kick start them into recovering their SG, and a "gentle" approach did not work.
I don't see this as a case where a "smart charger" needs the batts to have at least some voltage before it will even operate. The converters did operate, but at a lower voltage level where nothing happened.
There are "unknowns" why the two converters did not operate but the portable charger did. We know nothing about the rig's set-up wiring etc and whether it is valid. We don't know if the installed (how?) PM 75 set to 14.8 was no use in getting the near dead batts going, or even if that was tried out-- only that the WFCO at 13.6 was unable to get them going. Last we heard the PM was removed from its installation, so when did it get to try this?
Anyway, back to one thing, which is testing the PM for 75 amps now there is enough battery to power the 1500w inverter with an 80 DC amp draw, eg, a kettle. That would also be a battery test before applying the PM 75, to see if they are ok now.
The poor OP is going through a lot of difficulties here, but good for him keeping his cool and us up to date--we are learning useful things here. :)
For the battery gurus-- I am unclear how you can use equalize level voltages on the batts when they are not fully charged. In this case they were near dead flat. So what is that all about that you can only equalize a full battery?
It appears the near dead batts needed the high voltage to kick start them into recovering their SG, and a "gentle" approach did not work.
I don't see this as a case where a "smart charger" needs the batts to have at least some voltage before it will even operate. The converters did operate, but at a lower voltage level where nothing happened.
There are "unknowns" why the two converters did not operate but the portable charger did. We know nothing about the rig's set-up wiring etc and whether it is valid. We don't know if the installed (how?) PM 75 set to 14.8 was no use in getting the near dead batts going, or even if that was tried out-- only that the WFCO at 13.6 was unable to get them going. Last we heard the PM was removed from its installation, so when did it get to try this?
Anyway, back to one thing, which is testing the PM for 75 amps now there is enough battery to power the 1500w inverter with an 80 DC amp draw, eg, a kettle. That would also be a battery test before applying the PM 75, to see if they are ok now.
The poor OP is going through a lot of difficulties here, but good for him keeping his cool and us up to date--we are learning useful things here. :)
