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Larry

GeoffSchultz wrote in news:23fd18df-7c36-
:

According to Caterpiller, who makes my
153-5720 batteries, the charging rate should not exceed 5% of the CCA,
which is 1500 A per battery. That 3000 CCA total or a max charging
rate of 150A.

All wet. DEEP CYCLE house batteries with a low count of really thick
plates you eat away slowly with load are NOT Caterpillar starting batteries
that have huge cranking capacity for a few seconds because they have
massive arrays of really THIN plates creating massive surface areas.

They aren't even the same batteries!

Yeah, you can charge huge diesel cranking batteries in a half hour with a
massive charger because they have MASSIVE SURFACE AREAS to charge!

You CANNOT charge DEEP CYCLE, thick plated, much less surface area
batteries in this manner....another whole different animal entirely.

But, it's your boat. Buy the biggest goddamned charger on the planet and
charge the Deep Cycles with it at 25VDC in 10 minutes....