krobertson
New member
- Joined
- Jun 28, 2019
- Messages
- 9
I'm just starting to design, document, and prototype my own build. I've seen a few systems or products that seem to be made up a set of parallel 48v battery packs, and this looked pretty attractive to me as an interesting way to have a lot of flexibility for your overall capacity. The main thing I've seen is some server rackmount based battery packs, mainly from commercial offerings.
For me, an enclosed server rack would be perfect for keeping everything firmly secured, locked, and keep prying hands (kids) out, while letting me have everything stored in our detached shop.I was aiming to try and do 10p14s20p, where each 14s20p pack would be in a 2U server case and be about 3kW of capacity.
From my perspective, the main benefits of this approach is:
1) Start small, build up your capacity as you need more
2) Easy to take a unit of of use for maintenance
3) Growing the overall capacity lowers overall amp load per pack
Downsides could be:
1) BMS needs grow. At 10 units, I'd end up with essentially 140 cells to monitor, balance, etc. Looking at something like Libresolar in each unit vs needing like 140 Longmons.
2) Starting small will be very limited for amp load on each unit.
Any other downsides to this approach?
For me, an enclosed server rack would be perfect for keeping everything firmly secured, locked, and keep prying hands (kids) out, while letting me have everything stored in our detached shop.I was aiming to try and do 10p14s20p, where each 14s20p pack would be in a 2U server case and be about 3kW of capacity.
From my perspective, the main benefits of this approach is:
1) Start small, build up your capacity as you need more
2) Easy to take a unit of of use for maintenance
3) Growing the overall capacity lowers overall amp load per pack
Downsides could be:
1) BMS needs grow. At 10 units, I'd end up with essentially 140 cells to monitor, balance, etc. Looking at something like Libresolar in each unit vs needing like 140 Longmons.
2) Starting small will be very limited for amp load on each unit.
Any other downsides to this approach?