Can you looking at my wiring ...Which design is correct?

DIY
, , , ,
1

Current set up
Current set up991×580 30.6 KB

This is how I have wired up 2 x 100 ah batteries, inside a sealed battery box to achieve 12 volts 200amp
I just not sure if this is correct

Or this other option is preferred,

set up option
set up option991×580 31.5 KB

IE
Battery 2 + to Battery 1 +
Battery 1 - to Battery 2 -
Battery 1 + to busbar
Battery 2 - to shunt

would love some feed back

2

Your first drawing is OK. The only comment is why not connect the ac charger to the bus bar. It has 2 outputs but as the batteries are in parallel they do not need the separate feeds. The wire from busbar to battery needs to be large enough.

3

Fair point…

Current set up ver 2
Current set up ver 2991×580 29.7 KB

Something like this

4

@pwfarnell
Thoughts on
Battery 2 + to Battery 1 +
Battery 1 - to Battery 2 -
Battery 1 + to busbar
Battery 2 - to shunt

or
Battery 1 + to Battery box +
Battery 2 + to battery box +
Battery 1 - to battery box -
Battery 2 - to battery box 1

is still okay for obtaining 200ah evenly over both batteries

5

What about fuses and on/off switch?

6

On your revised drawing as long as the 4 battery wires are the same length charging will be uniform

See https://www.victronenergy.com/upload/documents/Wiring-Unlimited-EN.pdf

7

Fused to the eyeballs with circuit brakers and battery on/off switch

8

@pwfarnell
Thank you …yet again especially for the link
Greatly appreciated
Just a DC DC and 2000w inverter to go

9

This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.