The Orion BMS is a full featured lithium ion battery management system that is specifically designed to meet the tough requirements of protecting and managing battery packs for electric vehicles (EV), plug-in hybrid (PHEV) and hybrid vehicles (HEV) with automotive grade quality. (Orion Li-Ion Battery Management System | Affordable & Reliable EV Li-Ion BMS (orionbms.com))
Below we have Chris at Zero EV, giving us a run down on the Orion BMS.
It's the most popular BMS I have come across and has a number of features to make your EV build encompass all you need for a fully featured EV conversion.
Here is a link to their shop to purchase one for your build and all the additional add ones:#Orion BMS - Zero EV (zero-ev.co.uk)