3 parallel Lead Acid strings

[dapago]

017B5036-FA62-453B-868C-237A7D24FD8C.jpeg



i have made a little diagram. Just need to know if that is correct and if each batts will be well balanced.
cant afford to damage my batts or have unbalanced batts.

[dapago]

An other question. What Ah is needed for the busbar for my bank?

[Sunking]

Just need to know if that is correct and if each batts will be well balanced.
cant afford to damage my batts or have unbalanced batts.

Yes.

[Sunking]

An other question. What Ah is needed for the busbar for my bank?

Does not compute. Busbars are not rated in AH, the are rated in AMPS. The busbar current ratings (Amps) must be equal to or greater than the load imposed on it. If you have at least 1/8 inch thick copper 1 inch wide busbars will exceed anything you can throw at it as it will be rated at least at 200 amps.

FWIW the bus bars are the least of your concerns, or perhaps mine. What I want to know is just how you plan to integrate Over Current Devices using bus bars.

[Mike90250]

An other question. What Ah is needed for the busbar for my bank?

I'd size it for 2x the surge rating of your inverter. AND i'd feed it from the center of the bussbar, not the end

if the inverter can draw 250A at surge, i'd size the bussbar to 500a

[NEOH]

I'd size it for 2x the surge rating of your inverter. AND i'd feed it from the center of the bussbar, not the end

if the inverter can draw 250A at surge, i'd size the bussbar to 500a

Then, why not opposite ends of the bus bar,
Inverter (+) @ top of bus bar, near string #1's connection
Inverter (-) @ bottom of bus bar, near string #3's connection

Same with CC's

[NEOH]

Does not compute. Busbars are not rated in AH, the are rated in AMPS. The busbar current ratings (Amps) must be equal to or greater than the load imposed on it. If you have at least 1/8 inch thick copper 1 inch wide busbars will exceed anything you can throw at it as it will be rated at least at 200 amps.

FWIW the bus bars are the least of your concerns, or perhaps mine. What I want to know is just how you plan to integrate Over Current Devices using bus bars.

Can the OP add a DC Rated Fuse in series with each string ?

[dapago]

Then, why not opposite ends of the bus bar,
Inverter (+) @ top of bus bar, near string #1's connection
Inverter (-) @ bottom of bus bar, near string #3's connection

Same with CC's

Will do it as you suggest. My problem is to find the busbar here. Have been calling many electrical supplier AND the very few solar provider, nobody has busbar

F169EE73-3AC7-4477-8FB7-7A9159E2481F.jpeg

[dapago]

Does not compute. Busbars are not rated in AH, the are rated in AMPS. The busbar current ratings (Amps) must be equal to or greater than the load imposed on it. If you have at least 1/8 inch thick copper 1 inch wide busbars will exceed anything you can throw at it as it will be rated at least at 200 amps.

FWIW the bus bars are the least of your concerns, or perhaps mine. What I want to know is just how you plan to integrate Over Current Devices using bus bars.

My mistake sorry.

will try to find 200 amps busbar or may have to order them in the US. Was thinking of using earth bar but apparently (true?) I have been told that they are only brass coated (?)

[Sunking]

Can the OP add a DC Rated Fuse in series with each string ?

Yes but it needs more OCPD/ As you noted one OCPD on each battery, but there also needs to be OCPD looking at the CC and Load on the buss feeders.

[NEOH]

Will do it as you suggest. My problem is to find the busbar here. Have been calling many electrical supplier AND the very few solar provider, nobody has busbar

Is cadmium-plated solid copper OK ?

example: Something like this ...

https://www.ebay.com/itm/Solid-Coppe...0AAOSwDNdV3eqG

[Mike90250]

Then, why not opposite ends of the bus bar ...

usually makes complex cable issues, I like more symmetrical cables.