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Old 09-06-2017, 10:26 PM   #11
smiller
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Default Re: Terrible Construction on Mercedes Charge Relay

Quote:
Originally Posted by sprint2freedom View Post
Agree. A far bigger problem and a sure way to kill your batteries quickly is having too low of a charging voltage
Yes, if there's anything wrong with 14.1 is that it's a rather low absorption charge voltage and while it will do the job it will not provide optimal cell equalization and maximum cycle life. It won't hurt anything over a few charge cycles but if your normal way of recharging house batteries is driving on the road then it's a good idea to give them a full charge with a proper 3/4-stage charger every once in a while, or perform a manual equalization.
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Old 09-06-2017, 10:30 PM   #12
Graphite Dave
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Default Re: Terrible Construction on Mercedes Charge Relay

I used the Mercedes relay without a problem on the sold Sprinter. What was funny was the design of the actuating relay connectors. Not designed to connect a wire to the relay. Was told had to buy adapters. Bought the adapters which did connect to the relay. Only problem was I still could not connect wires to the adapters. As I recall I discarded the adapters and jammed a spade wire terminal into the opening. Found the design quite hilarious.

I also believe a battery charged with a correct 3 stage charge provile does last longer than a battery directly connected to the starting battery. Unfortunately I have not read any proof that it is true or how the battery life will change. I get a proper 3 stage charge from my MPPT solar controller. For a backup if weather condition force its use, I power the shore power 3 stage charger with 120 volt AC from a pure sine vehicle powered inverter.
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Last edited by Graphite Dave; 09-06-2017 at 10:32 PM.
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aux battery, battery charge disconnect, relay, solar rv conversion

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