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Post by yodaveyo on Aug 16, 2018 23:19:14 GMT
I have a couple Commander 40 controllers, a single array, and two battery banks. I want to connect both controllers to the array (parallel controllers) and each controller to a separate battery bank.
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Post by tattoo on Aug 17, 2018 0:56:51 GMT
Do it.... How many batteries in each bank and how many panels???
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Post by Admin on Aug 17, 2018 16:30:31 GMT
I have a couple Commander 40 controllers, a single array, and two battery banks. I want to connect both controllers to the array (parallel controllers) and each controller to a separate battery bank. Hello, which panels and how many of them? Also, what battery bank size are you interested in connecting? |
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Post by tattoo on Aug 17, 2018 16:34:38 GMT
LOL There is an echo in here..... Hello, hellooooo, hellooooooo
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Post by yodaveyo on Aug 18, 2018 1:50:42 GMT
Hi. I have three panel in series 59 volt 9 amp ~540 watts going to a single battery currently 4D changing to  AGM. This is the plan at least. |
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Post by yodaveyo on Aug 18, 2018 1:52:02 GMT
One battery each in two separate banks...
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Post by yodaveyo on Aug 18, 2018 1:53:02 GMT
And changing the 4D batteries to 8 D
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Post by tattoo on Aug 18, 2018 3:03:19 GMT
Hi. I have three panel in series 59 volt 9 amp ~540 watts going to a single battery currently 4D changing to AGM. This is the plan at least. Why the two CC? You don't need but one... |
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Post by yodaveyo on Aug 21, 2018 15:07:38 GMT
This is what I have...
I have two '4D' batteries in separate banks ~200AH each bank. I draw alternatingly from one battery bank at a time saving the other battery as a reserve. Because I only draw from one bank at a time, the battery banks can be expected to have different charge states. I can charge from an Inverter/Charger when the inverter/charger is connected to AC. I have an switch to allow the inverter/charger to charge to Bank 1 or Bank 2 or both. I also charge from an alternator.
This is my plan. I want to hook up solar charging to supplement the inverter/charger and alternator charging. I want to maintain my two separate battery banks.
I have one three panel solar array connected in series - roughly 60V, 9A, ~540 watts.
I have two Commander 40 charge controllers.
I would like to hook up the charge controllers in parallel on the solar input so that each controller connects to one battery so that each controller can maintain its battery bank separately.
Is this a good or bad idea? If it is a bad idea, what should I think about to make it a good idea?
I am concerned about a failure of the charge controller shorting one battery to another. I do not know what else I should be worried about.
Thanks for your input.
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Post by Admin on Aug 21, 2018 16:43:32 GMT
This is what I have... I have two '4D' batteries in separate banks ~200AH each bank. I draw alternatingly from one battery bank at a time saving the other battery as a reserve. Because I only draw from one bank at a time, the battery banks can be expected to have different charge states. I can charge from an Inverter/Charger when the inverter/charger is connected to AC. I have an switch to allow the inverter/charger to charge to Bank 1 or Bank 2 or both. I also charge from an alternator. This is my plan. I want to hook up solar charging to supplement the inverter/charger and alternator charging. I want to maintain my two separate battery banks. I have one three panel solar array connected in series - roughly 60V, 9A, ~540 watts. I have two Commander 40 charge controllers. I would like to hook up the charge controllers in parallel on the solar input so that each controller connects to one battery so that each controller can maintain its battery bank separately. Is this a good or bad idea? If it is a bad idea, what should I think about to make it a good idea? I am concerned about a failure of the charge controller shorting one battery to another. I do not know what else I should be worried about. Thanks for your input. In reference to the single panel array and two charge controllers to charge two separate battery banks, theoretically you should be able to connect this. Understand that the controllers will behave independently and you might experience a more dominant controller when charging two banks at the same time. You wouldn't necessarily have to worry about shorting the batteries because the charge controllers behave like blocking diodes and would prohibit back-flow. Something to consider, if you're eventually going to expand your solar system, it might be best to have two separate arrays charging two separate battery banks. -Renogy Team |
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Post by yodaveyo on Aug 21, 2018 17:23:48 GMT
Great! Thank you for the fast reply. I expect only one of the controllers to be actively charging at any one time as the other battery should always be charged. I will consider your idea about eventual expansion but this is going on a boat and expanding the array would mean expanding the size of the boat which is not economically realistic.
Thanks again.
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AGM. This is the plan at least.