FilterGuy
Solar Engineering Consultant - EG4 and Consumers
In regard to the above diagram, (which is how I will be doing mine), is it still important to use the diagonal wiring of the 4/0 leads to the Inverter even though they are coming off of the bus bars and not the top/bottom battery terminals? I ask to be sure my 4/0 leads are long enough.
Is it better to do the diagonal? Yes. Without a doubt.
Is it important to do the diagonal? That is a more difficult question to answer.
- The larger the bus bars, the less the voltage drop across them will be and the importance of the diagonal connection diminishes.
- At some point other factors such as the internal resistance of the BMSs can be a larger factor than the advantage of diagonal wiring.
- The objective of doing the diagonal is to ensure a more even wear on the batteries. However, if the batteries are only cycling once per day, the calendar life of the battery may get you before uneven wear does.