Yes, Lifeline does recommend equalizing but unless they've changed something it's only as required, not every 30 days. From their manual:
"Equalizing should only be done when the battery is showing symptoms of capacity loss or from inadvertent deep discharges."
Problem is, when you equalize sealed batteries -- and Lifeline recommends 15.5VDC for 8 hours -- you're risking loss of electrolyte and irreversible damage, so you don't want to do it more than necessary. However, you DO want to fully charge the batteries at least once a month to avoid sulfation.
Silpe, I think you need to check ALL connections -- to the batteries, to the regulator
, to the alternator
, etc. I'd start right at the batteries, though, because it seems you have the same problem irrespective of charging source. Make doubly sure the contacts are clean, the connectors are well attached to the cables
(were they done professionally?), etc. Also, check the battery voltage sense wire. Check the cables
and connections which connect the various batteries in the bank together.
Also, your first post said you have 1050AH. Is that right????? If so, an AGM
bank of that size could very easily take 800 amps of charging current
or even more. Two 60-amp Hitachi alternators would be woefully undersized for an AGM bank of this capacity.