9.The AC110V or AC220V/AC240V electric stand-by, 400AH Auxiliary battery pack are optional. 10. Kingclima battery driven van reefer unit have already been installed on Maxus e-deliver3, e-NV200, BYD T3, Kangoo Z.E, full electric vans, and Kangoo, Partner, compact, connect, Debica, Dobalo, Citan, Vieto, Caddy, Combo etc engine vans.