Just got mine working properly after a fair bit of troubleshooting, and I have to say it's a solid pairing once you get the comms sorted. The SPF3000 plays nicely with the JK BMS when you configure the CAN protocol correctly—absolutely crucial that bit.
My setup's running in the garden office, so I needed something reliable without constant faffing about. The Growatt handles the heavy lifting on charging cycles, and the JK BMS keeps everything sensible with proper cell balancing. What sold me was the response time on the battery management side; genuinely quick when it needs to cut in.
Fair warning though: the manual documentation is about as useful as a chocolate teapot. Ended up cross-referencing Growatt's forum posts and a YouTube deep dive to get the CAN parameters right. Once you nail the settings though, monitoring through the app is brilliant. You get proper visibility into what's happening in real time.
The only thing I'd watch is firmware compatibility. I'm running what was current as of last month, and there were definitely some quirks with older versions. Worth checking what others are using if you're building fresh.
Has anyone else paired these two and had issues? I'm particularly curious if anyone's running larger battery banks—mine's modest at the moment, but I'm expanding soon and want to make sure the BMS doesn't struggle with higher throughput. Also interested in hearing whether people are seeing the efficiency figures Growatt claims.
