After extensive testing, we found that the SOC is not accurate with Battleborn drop-in lithium batteries. We believe this is due to the fact the Battleborn's internal BMS is not allowing the BMV to take accurate readings.
For example, on a 100Ah battery - When the battery has half of it's capacity drained with 50Ah consumed, the SOC reads 0%. It will remain at 0% as more Amp hours are consumed and pulled from the battery. The SOC will register 1% when it is charged back to only 50Ah consumed, and will increase to 100% once it reaches 0Ah consumed.
Of course it should be a direct relationship for this example - Every Ah consumed should equal 1% in the SOC.
Is the lack of an accurate SOC a limitation of the BMV-712, since it was designed to work with Victron batteries that don't have an internal BMS?
