Recent content by SwedishDIYer

The project is now online and working! Still some stuff to do, casing for the batteries and some cable management. CheckWatt is nice, but they have no support for Victron. Maybe in the future! For now I´ll just use Victrons Dynamic ESS, or perhaps this project that seems to be working well...

Oh never mind ? You are of course correct. It’s too late in the evening for me now, I need to hit the bed ?

Yes, but I will have three of those gigantic batteries, a total of 4860Ah. One BMS each.

Thank you, that's valuable input. Just to make sure that I understand you correctly - the orange lines you drew are for balancing the cells (if any imbalance occurs) and there won't really be any large currents passing by these cables? And two of these 3P4S-packs, joined like that would be...

I am currently looking at the Victron system, and I've started to do "shopping-list". If anyone with know-how want to chip in, I´d appreciate it - the Victron eco-system is still new to me and all the information and documentation available feel a bit overwhelming ? 3x Victron MultiPlus-II...

Yes of course, thank you. It makes much more sense to do 12S ?

I started to disassemble the e-tron battery today, and it seems as if I need to re-think this a bit. The batteries are 3P4S and they are not easily taken apart. My idea was first to make some 14S1P packs to reach 51V. I guess I’ll have to use four of these packs in series to reach 58,72V...

I´ll have to read up a bit on Victron, its probably the best choice for my situation.

Yes, going for the lower voltage setup seems to be the best path. I have 324 cells to work with, so I have the option to make 22 packs with 14S1P to reach 51V. Is there any point in making 14S2P instead? Also, what BMS is considered to be "state of the art" for this kind of project? I´ve been...

Thanks, I’ll have a search on GitHub ? Still not sure about the voltage, can the SPH inverters speced to 100-500v handle a 48v battery?

Yes, they can be re-arranged. I have not yet decided what system voltage I want, I was thinking about 48v, but 144v might work too. Growatt has some nice looking inverters (SPH10000TL3 BH-UP) but they want 100-500v battery voltage and I’m not sure if I can find a BMS that works with that...

Hi! First time poster here. I currently have an Audi E-Tron battery pack that I want to use to make a powerwall. The battery pack is 71kWh, has 27 modules with 12 cells each. Each cell is 3,66 volt and 60Ah. It’s LG Chem and model LGX N2.1. I’d like to build a 3 phase battery storage out of...