I am using EP760 and plan to connect 3 strings of 4 panels (Voc=50V) at 620W to it.
Usually, each string is equipped with a circuit breaker and a surge protection module as insurance against lightning strikes or thunderstorm effects.
The Bluetti documentation does not specify any requirements for PV circuit protection. While I do not see the need for a circuit breaker (it is already included in the device), I have doubts about the surge protection module.
I would like to hear your opinion on this matter.
I would also like to request access to the Pro features of the device — they may be necessary, as I am in Ukraine and the winter is not expected to be easy.
Our technical team recommends installing a circuit breaker and surge protection module in the system to prevent lightning strikes from affecting the equipment. While the machine is already equipped with protection modules and circuit breakers internally, adding these devices externally for the solar panels allows for individual control, achieving a quick disconnection and isolation effect.
After installation, please be sure to confirm the grounding and check for any short circuit issues to ensure the safety and stability of the system.
If you have any questions or need further assistance, please feel free to contact us.