Background information: I bought a battery from an established diy electric skateboard company that was advertised to be over 600 wh. It is a 12s3p with Panasonic 21700 cells.
Any insight or help would be very much appreciated.
I mainly bought this pack because of the advertised wh being over 600 (prioritizing range). After the build is done I noticed that I getting the same range as my friends backfire with a 318 wh battery when we go on rides. I thought something was up because the battery was draining way faster than I thought it would so I did a test today. I charged the board all the way to full and went for a nice 10 mile ride completely on completely flat terrain trying to save as much battery and maximize my range (temperature was 55 fah). I went from 100% charge down to 40% in only 10 miles when I felt the power drop off (Cruising around 15mph no fast acceleration). This would net me a theoretical range of less than 17 miles. I’m not running offroad tires either.
The vesc software said the ride drew a total of 219 wh going from 100% to 40%. Doing the math the pack has a theoretical capacity of 363wh.
The company I bought from has a strict no return policy unless the product is faulty or doesn’t work. I know when I email them they are going to tell me that I’m not accounting for a bunch of factors but theres no way that there is over 250wh being lost from the battery pack to the esc.
What would you do? I feel like the specs given for the battery are a complete lie. Sorry for the long read, but I tried to give as much information as possible.