vandyh

If you can afford to go the Lithium-ion route, you will never use lead-acid again. I've started out by building my own packs with only using recycled 18650 laptop cells and the result is totally different. 

If you can afford to go the Lithium-ion route, you will never use lead-acid again. I've started out by building my own packs with only using recycled 18650 laptop cells and the result is totally different. 

My system as follows:
VE Multiplus 3kVA, 48V INV/CHR with venus GX Fronius Primo 3kVA GTI connected on AC-out of Multiplus - controlled via frequency shifting to have PV power in the event of mains failure 2 PV string, totalling 3,570kWp that can generate up to 22kWh on a good day. 48V 100Ah DIY Li-ion battery system with recycled 18650 cells - still testing them out Batrium BMS connected to Venus GX via CAN-bus - still some issues to sort out here My system is not 100% working and I need some help here and there as there. A few photos of my setup below    

Yes I did. testing them took me almost 3 months...
So I've made my own Arduino tester than can measure 4 at a time and I bought a few 4-bay charge/dischargers to speed up the process.
Old cells has to be tested before using it in a pack. I had a few that charged up to 4.2V fine and then discharged to 3V with <20mAh

My system as follows:
VE Multiplus 3kVA, 48V INV/CHR with venus GX Fronius Primo 3kVA GTI connected on AC-out of Multiplus - controlled via frequency shifting to have PV power in the event of mains failure 2 PV string, totalling 3,570kWp that can generate up to 22kWh on a good day. 48V 100Ah DIY Li-ion battery system with recycled 18650 cells - still testing them out Batrium BMS connected to Venus GX via CAN-bus - still some issues to sort out here My system is not 100% working and I need some help here and there as there. A few photos of my setup below    

My system as follows:
VE Multiplus 3kVA, 48V INV/CHR with venus GX Fronius Primo 3kVA GTI connected on AC-out of Multiplus - controlled via frequency shifting to have PV power in the event of mains failure 2 PV string, totalling 3,570kWp that can generate up to 22kWh on a good day. 48V 100Ah DIY Li-ion battery system with recycled 18650 cells - still testing them out Batrium BMS connected to Venus GX via CAN-bus - still some issues to sort out here My system is not 100% working and I need some help here and there as there. A few photos of my setup below