BMW OEM 4s 14.8v 75ah 1.11kWh OUT OF CASE
These modules in particular are BMW modules that have been removed from the steel enclosure so you will get batteries that look like the photo. Some will have some black plastic around the them and some might come with the plastic lid but all that will peel off nicely and give you a battery that looks just like the main photo. These are built very well and without the metal enclosure we have priced these $20 less and you actually will save some space this way.
3s and 5s modules will be available while supplies last so you can buy one of these 4s modules and a 3s module to make a perfect 7s 24v module. 2x 4s and 2x 3s to make 14s 48v. 1x 4s and 2x 3s to make a 10s 36v module. Or 2x 5s and 1x 4s to make a 14s 48v module. Many customers are using these modules for golf cart batteries and we have been installing them in forklifts in partnership with a forklift company so these really have been tried and tested. Also perfect for a powerwall but built for all applications.
As you can see in the 2nd photo showing the discharge curve these cells have a higher than normal nominal voltage based on the professional tests we've conducted. They hold a nominal voltage of roughly 3.84v per cell and 95% of the energy is above 3.3v per cell.
This is the greatest deal you will find on BMW batteries. BMW batteries are very valuable because they are built like tanks and use Samsung or LG NMC prismatic These use 45ah cells and are in 2p format. So the 4s module is actually 8 cells in 4s2p configuration.
Dimensions: Approximately 10.5" x 6.5" x 6"
Weight: 24 lbs.
Pack nominal voltage: 15.36v (3.84v/cell)
Pack amp hours: between 70-80ah
Pack watt hours: roughly 1.1 kWh
Recommended Max continuous discharge: 150a
Recommended Max pulse discharge (10 seconds): 600a
Recommended Max continuous charge: 100a