pralinebuckets
New Member
- Joined
- Jan 3, 2021
- Messages
- 59
Hi all,
I'm new to the forum and am learning a lot here. I'm designing an off-grid system that will not include solar for the foreseeable future mainly due to lack of appropriate clearings in the forest. I do however, have a 9.5kW generator on the site, but have no grid access. I would like to run the generator for the least amount of time possible to charge my batteries, so my goal is to design a system that will take advantage of the relatively high output.
My generator can provide 240V @ 50A peak, or steady at 9500W through the one cable, or a combo of multiple 120V 50A & 30A outputs. My hope is that I can run the generator at or close to the max capacity of 9500W. I believe the Victron Skylla TG Charger 24/48V will get me the closest to success here. It would allow for charging @ 240V 50A.
I'm not sure what the best inverter to choose is. I don't see a good 48VDC to 120VAC inverter w/ CANbus support from the usual suspects. Victron only has 240VAC units or low wattage 120VAC, and the rest seem to only offer inverter/chargers, which I don't need half of.
For batteries, I'll be building my own LiFePO4s of somewhere in the range of 10-14kWh in a 48V series setup. I want to be at or above 9.5kWh in my bank so that I can arbitrarily charge it from the generator in roughly 1 hour.
I believe that the REQ and Orion BMSs will allow charging the cells at a high enough amperage, but I'm finding conflicting information on the cells themselves. Can a single LiFePO4 cell handle upwards of 100A even? I see some BMSs support that rate and higher, but I'm having a hard time finding out the limitations of the cells themselves. Will I need to hook up multiple 48V banks in parallel to charge at or around the ~200A required at 48VDC?
Thanks for any advice or help you can offer!
I'm new to the forum and am learning a lot here. I'm designing an off-grid system that will not include solar for the foreseeable future mainly due to lack of appropriate clearings in the forest. I do however, have a 9.5kW generator on the site, but have no grid access. I would like to run the generator for the least amount of time possible to charge my batteries, so my goal is to design a system that will take advantage of the relatively high output.
My generator can provide 240V @ 50A peak, or steady at 9500W through the one cable, or a combo of multiple 120V 50A & 30A outputs. My hope is that I can run the generator at or close to the max capacity of 9500W. I believe the Victron Skylla TG Charger 24/48V will get me the closest to success here. It would allow for charging @ 240V 50A.
I'm not sure what the best inverter to choose is. I don't see a good 48VDC to 120VAC inverter w/ CANbus support from the usual suspects. Victron only has 240VAC units or low wattage 120VAC, and the rest seem to only offer inverter/chargers, which I don't need half of.
For batteries, I'll be building my own LiFePO4s of somewhere in the range of 10-14kWh in a 48V series setup. I want to be at or above 9.5kWh in my bank so that I can arbitrarily charge it from the generator in roughly 1 hour.
I believe that the REQ and Orion BMSs will allow charging the cells at a high enough amperage, but I'm finding conflicting information on the cells themselves. Can a single LiFePO4 cell handle upwards of 100A even? I see some BMSs support that rate and higher, but I'm having a hard time finding out the limitations of the cells themselves. Will I need to hook up multiple 48V banks in parallel to charge at or around the ~200A required at 48VDC?
Thanks for any advice or help you can offer!