Growatt 3kW and 2x PylonTech battery stack - help pls!

[Leth]

Hello to all the fundis. I am hoping to get a little peace of mind or solid direction before I take the plunge today - it has been a journey  May I ask advise on this:

I currently have a Growatt 3kW inverter with a single PylonTech US3000 3.5KwH - which works beautifully but need additional battery storage due to our ever increasing Eskom drama. Got an installer who purchased and attempted to add a US3000C. Much drama and could not get BMS to work effectively. I will save the details BUT I have now sourced stock of 2x US3000C hoping for better communication between the BMS on these.                                                                                                                                                                                                 1)   will having 2x US3000C vs the current US3000 & US3000C mix resolve my (installers) issue? I am not tech savvy and honestly just don't have the luxury of time to keep trying different settings etc (due to work pressure and the need to be UP and RUNNING at all times)   Am I making a mistake buying the 2x Pylons with the current Growatt? Is there going to be a struggle?     2) Is there an Inverter better suited to the PylonTEch battery setup?   Don't want 1x 5kw battery as it isn't enough and can't have 2x 5kw as not enough panels etc. Can't upgrade to 5KwH inverter as no space for thicker (6mm) cable in conduit???    ANY solid advice or even someone who actually managed to get 2x PylonTech stack with Growatt 3kw to work (and even prepared to help in Joburg SA)??? Tx guys 

[markus_m2]

Two Cs won't fix your issue. Problem is the "old" BMS cable won't communicate with the "C" battery - you need to either buy the new type cable, or just get a crimping tool and crimp a new connector according to the "C" battery pin-out. 

 

Dunno why Pylontech changed this pin-out on their new battery!?!?

 

Anyways, "older" 3000 will work in conjunction with "C" no problem. 

Suggest update firmwares, run "C" as master, & balance correctly in the start...