I recently had a discussion with an electrician who advised me to change my existing inverter, the MUST PH1800 Pro, because it lacks a Battery Management System (BMS). He mentioned that this means I'd have to manually adjust the overcharge and discharge limits, which could harm the lifespan of my lithium battery. He suggested I switch to a model like the Growat SPF5000ES that has a BMS. However, my battery already has a BMS. What do you all think? Should I go ahead and change my inverter?
3 Answers
I think it's worth looking into if your inverter has RS485 communication options, as some can be set up to work with a BMS despite not being branded as having one. If it can handle the settings well, you might save some cash by sticking with your current inverter and focusing on correctly setting up your battery management.
Honestly, I think you may not need to rush into changing your inverter. The BMS is crucial for battery health, but most inverters, including your current one, have settings that can manage battery charging and discharging without a dedicated BMS. If your battery can communicate with your inverter, that might be enough. Just check your inverter’s manual and see what options you have for settings.
It really comes down to whether your current inverter can effectively communicate with the BMS in your battery. If it’s not compatible, replacing it might be the best choice. However, many people run successful setups with mismatched BMS and inverters—just make sure you’re comfortable with the manual adjustments you're supposed to make.