US3000 adding UP5000 - cable lengths

[FixAMess]

I've got 4 US3000 pylontechs (3Xus3000A, 1 US3000B) and want to add a UP5000.

As per the data sheets the inter-battery cables (NOT to inverter) for the US3000 is 18cm center to center of plugs VS the UP5000 20cm+ between plugs, so probably 24cmin total.

So its up3000 cable lengths t(18cm) to UP5000 cable length 24cm.

I believe its best practice to keep the inter-battery parallel cables the same lengths. In this case does it make much difference?

Has anybody else connected US3000 to UP 5000 using the different length cables and have you noticed any issues with the difference in discharge/charge rates of the batteries?

Edited March 12, 2023 by FixAMess
spelling

[Beat]

On 2023/03/12 at 1:02 PM, FixAMess said:

I believe its best practice to keep the inter-battery parallel cables the same lengths. In this case does it make much difference?

Battery packs of different capacity have different internal resistance (Ri). The difference of cable length has no importance as the difference of resistance due to cable length is neglectable compared to the difference of Ri.