PaulStafford
New Member
- Joined
- Oct 10, 2022
- Messages
- 5
I currently have 3 x 100Ah AGMs on my trailer. I'd like to upgrade to 500Ah.
There's a commercial battery from Cyclenpo with this capacity, and it would drop right in, but I'm really nervous about ordering direct from an unknown Chinese supplier- if there's any problems, I'm probably SOL.
The alternative is to DIY out of individual cells and a BMS as many on this forum have done. I've never done it, but this forum (along with Will's many YouTube videos) makes it look relatively straightforward.
This needs to be a 12V system to be compatible with the trailer system and existing MPPT, and with at least 300A max discharge current to supply my Multiplus 3kW inverter. I've gotten as far as selecting the Fortune 100Ah (4S 5P). They would fit neatly in the current battery space, and a threaded rod will hold them together just fine.
My question is - whats the best BMS and configuration to use? I haven't found anything that's directly usable in this config. Most BMS seem to have a maximum of 200A. I'm really hoping not to have to parallel multiple BMS...very expensive.
Another question is environmental. My current 3 AGMs are IP67, and I don't have a battery box (the terminals are well protected against shorts). Can these cells and/or BMS live in the Wx or do they need a box?
There's a commercial battery from Cyclenpo with this capacity, and it would drop right in, but I'm really nervous about ordering direct from an unknown Chinese supplier- if there's any problems, I'm probably SOL.
The alternative is to DIY out of individual cells and a BMS as many on this forum have done. I've never done it, but this forum (along with Will's many YouTube videos) makes it look relatively straightforward.
This needs to be a 12V system to be compatible with the trailer system and existing MPPT, and with at least 300A max discharge current to supply my Multiplus 3kW inverter. I've gotten as far as selecting the Fortune 100Ah (4S 5P). They would fit neatly in the current battery space, and a threaded rod will hold them together just fine.
My question is - whats the best BMS and configuration to use? I haven't found anything that's directly usable in this config. Most BMS seem to have a maximum of 200A. I'm really hoping not to have to parallel multiple BMS...very expensive.
Another question is environmental. My current 3 AGMs are IP67, and I don't have a battery box (the terminals are well protected against shorts). Can these cells and/or BMS live in the Wx or do they need a box?