Originally mounted Kelly KBL72201 was too weak regarding startup current, replaced with better suited Kelly KEB72801X to allow starting on any slope it can climb at 30km/h.
Controller mounted on 2mm thick aluminum plate instead of steel for better heat dissipation.
Grin Technologies Cycle Analyst HC with 200A / 0,5mOhm shunt added for proper monitoring and logging of energy use.
Luggage "rack" (stainless steel sheet metal bracket) added for topcase, rack made by Masini, another importer of Erider.cn scooters in Germany.
Orignally mounted capacitive active BMS blew some caps on a hot day and was eventually replaced by the fully programmable central shunting type "Emsiso BMS7205".
Due to great performance reduction of the GBS LiFePO4 cells when used at low temperatures a self-devised battery heating was added along the sides of the 6 rows of 4-cell blocks.
It consists of an 8meter / 120W (230V) heating cable arranged in precisely laid meanders and sandwiched between cell block aluminum endplates and battery box wall with 5mm styrofoam/aluminized foil insulation:
Battery temp. sensor burried in between cell packs with a solar-powered digital display added (on the right in the pic below):
Battery box is sealed from the top, battery/controller cables upgraded to 35mm² (AWG 2). New cables on the left in the pic below, original on the right...:
Hand guards added to keep winter wind chill away from gloves: