Good day Everyone

I need some help with busbar sizes. 

I need to connect 5 x 5.12kW lithium batteries in parallel and then connect them to 2 x Disconnect Switches. What amp rating busbar will I need to bring all batteries cables together.

 

Regards

Lourens

What current will you be pulling from each battery, this would help.

Greglsh

I'm not 100% sure. Never tested it. Currently I only have 2 batteries connected. Should have the other 4 early next week. 

 

Okay, what inverter are they going to be connected to.

14 minutes ago, Lourens1975 said:

Most  battery busbar should be more then enough to handle it  https://livestainable.co.za/products/modular-distribution-block-4-bar-200-a-mdb-200-a-12?variant=43670911680692&country=ZA&currency=ZAR&utm_medium=product_sync&utm_source=google&utm_content=sag_organic&utm_campaign=sag_organic&gad_source=1

https://www.sunstore.co.za/products/victron-energy-battery-busbars-150-250-600a?variant=40775803043874

150amp +

Edited February 26, 20251 yr by Stefan Cornelissen

If I am reading the inverter correctly it looks like the max current it can pull is 131 amps. This site has a calculator that you can enter the width and thickness of the busbar and it will give you the current rating, I would go for a minimum of 25% more so +- 165 amps. 

 

https://www.allumiax.com/bus-bar-size-calculator

If I understand correctly, I'll be fine with 250A busbars. Awesome. Thanks guys, much appreciated.

20 x 5 mm copper busbar can carry 274 amps at 30°C

https://www.em.co.za/BRF1015?srsltid=AfmBOorYF8xiMaO9B35Xk7XuWaNeW7x_6J1zWADiboIbEFKK1CE10Ure