E&J worked with worldwide famous brand RV manufacturer and produced lifepo4 batteries with CI-bus, Can-bus, RS485 for the worldwide RVs, motorhomer.CI-bus is the newest protocol for RV batteries. Its similar to CAN-bus. The E&J 12.8V lifepo4 batteries implement the CI-bus protocol to make sure the battery datas can be read by the newest RV centre control system. E&J technology group held professional R&D team on the lifepo4 cells, active balancing BMS and battery packs structure design, strengh to produce the highest quality 12.8V lifepo4 batteries with history data log recording and IOT solution for worldwide customers to enjoy better quality batteries, enjoy better life. Now we also looking forwarde more distributors worldwide for our highest quality design 12.8V lifepo4 batteries build in smart active balancing BMS and history data log reading and export out function. Feel free to contact our sales team sales@ejtechgroup.com