Inaccurate temperature readings - Solar Assistant vs EG4 LL BMS Screen

[medic149]

Has anyone else had this issue?

I have 3 EG4 LL 48V batteries. They were reading -3c, 04c, and -3c.

When I checked Solar Assistant, they read 39.2F, 41F, and 44.6F.

Any thoughts on why the difference??

The SOC percentages on the batteries and Solar Assistant were the same and correct.

 

[RCinFLA]

Battery packs at the top of the rack often read higher temp.

Heat rises.

It is a good idea to swap their position in rack every six months to year to even out the wear on the packs.

Lower temp cells have greater overpotential voltage slump for given current so a cooler pack contributes less current to the total rack current load.