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The Norfolk Broads Forum / Broads Boat Owners Q & A / Solar charge controller
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Posted By Discussion Topic: Solar charge controller

Similar Threads That Might Help :
solar battery charging| Controller| Solar Panels| Solar Panels| Solar Ventilators| Solar Panel fitting|

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stuballs
Jan-08-2019 @ 5:32 PM                           Permalink
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Learning The Ropes
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Hi,
I have just purchased a 10a charge controller for my solar panel.

I have 2 isolated batteries on my boat and I plan to use an "on-on" diverter switch by way of the positive cable to select the battery I wish to charge.

My question is regarding the negative cable:-
1) Will I also have to use an "on-on" diverter switch for the negative cable to select the battery I wish to charge?
or
2) Will it work OK if the negative cable is connected to just 1 of the batteries when the other battery is selected?

I hope I have explained this clearly.

Kind regards,
Stuart.


annville
Jan-08-2019 @ 7:16 PM                           Permalink
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Hi Stuart No you don't need a switch on neg wire/s to the batteries, ALL the neg cables should be connected to one point for both batteries/banks if you have more than one battery in a bank the neg wire should be connected to one battery and the pos to the other battery or if more than two to the furthest apart ones. The solar regulator needs to be connected to the battery pos side via a fuse of the battery isolator/on/of switch, not the consumer side this allows the solar to charge when you leave the boat with the isolator switched of, this would be the most used ie consumer battery to charge the engine battery bank, use a battery/maintainer controller between the banks, this will charge the engine battery bank when the domestic one is fully charged, Sterling Power do a neat one! both surplys need to have a fuse in the pos cable to each bank, all negs should be connected to the main neg terminal.Doing it this way will keep both banks fully charged with out you doing anything/forgetting automatically. it will cost a bit more but best way in the long run and will get the most longevity out of your batteries, Oh and grease all terminals bare wire ends and fuse contacts with vaseline not anything else.this will stop any corrosion taking place and causing low voltage in the circuits. John



This message was edited by annville on Jan-8-19 @ 7:04 PM

stuballs
Jan-09-2019 @ 11:28 AM                           Permalink
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Learning The Ropes
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Thank-you very informative


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