CyberBill
New Member
I've come across a source for some large battery modules used in busses. 48 cells arranged as 2P24S, 88.7VDC nominal. 7.6kWh each. They weigh 140 pounds each with integrated BMS and cooling. It's looking like I'll be able to get at least 6 of them, maybe more, and might be able to get a trickle of them over time.
I have been planning a grid-tied battery storage system for a little while, and my plan was to use an EG4 GridBOSS and a FlexBOSS21 with some kind of 48V battery, but this kind of throws a wrench into that, as it (like other 48V battery inverters) only supports up to 60V. So I'm looking for some advice/recommendations. I know of at least two options:
Option 1: Open the modules, reconfigure for 16S. Either do 3P16S within each module, or 3x 2P16S out of each 2 modules. I'd have to open the pack first to see which would be more feasible. I'd also probably need to buy a 48v BMS for each module.
Option 2: Find an inverter that supports 24S packs. I really like the EG4 setup (gateway + multiple inverters), so in addition to finding an inverter I'd also need a compatible gateway.
What do you think?
I have been planning a grid-tied battery storage system for a little while, and my plan was to use an EG4 GridBOSS and a FlexBOSS21 with some kind of 48V battery, but this kind of throws a wrench into that, as it (like other 48V battery inverters) only supports up to 60V. So I'm looking for some advice/recommendations. I know of at least two options:
Option 1: Open the modules, reconfigure for 16S. Either do 3P16S within each module, or 3x 2P16S out of each 2 modules. I'd have to open the pack first to see which would be more feasible. I'd also probably need to buy a 48v BMS for each module.
Option 2: Find an inverter that supports 24S packs. I really like the EG4 setup (gateway + multiple inverters), so in addition to finding an inverter I'd also need a compatible gateway.
What do you think?