Internal BMS and solar charging. How to solve?

[Deividas]

I have bought 2x100 Ah RENOGY Lifepo4 batteries with internal BMS.
And I have a Victron Smart Solar 100/20 controller for charging.

I understand that controller should be connected directly to batteries (without any switch) and can't be disconnected before solar panels are disconnected.

Batteries have internal BMS and will automatically disconnect themselves after reaching full charge. This automatically will damage the solar controller. Or not?

How to solve this?

[jack4566]

Idk who told you that but you always want the BMS between your battery and ANY device. It protects the battery from damage.

Solar > Controller > BMS > Battery.


If you read the battery manual page 4 the batteries only disconnect under Over/ Under Voltage conditions that would damage the batteries. If you never exceed a range of 8.0V to 15.6V the battery will be fine. Your solar controller should be setup to charge up to 14.4V and no futher. The controller is smart enough to stop charging.


Balance your cells (If not already) configure your charger for Lifepo4 batteries and go.