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Post by hhsgypsy on May 25, 2022 3:18:21 GMT
So I discovered this weekend that the Dolphin ACS (automatic charge switch) that the factory installed in our 2022 NC795 S2 will not allow the engine to charge the house battery if the voltage is below 12.4V. As we have AGM house batteries that can safely handle a 50% SOC or 12.0V, this is problematic. This past weekend after a night at anchor, our house bank was at 12.02V, so the ACS wouldn’t allow the engine to recharge the house bank. This meant we had to run into a marina for shore power to bring our battery past 12.4V, at which point our engine charged the rest. Has anyone experienced this and come up with a solution? I used a jumper wire on the second morning to parallel the house and engine batteries for 30 minutes or so and that worked as well, by effectively bypassing the ACS.
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Post by zaphod on May 25, 2022 4:27:18 GMT
That doesn't make any sense. Looking at the manual it looks like the conditions to engage the relay are Batt In at 13.6v and Batt Out 10.5v.
Batt Out should be the house bank side.
That means the relay should engage and charge the house bank as long as the alternator is putting out sufficient voltage and the house bank is putting out 10.5v.
If that isn't happening then the relay is likely defective or mis-wired.
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