24/11/2021 · It is all electric refrigeration units for all electric vans with 4-7m³ or 12-16m³ van box, you can use high voltage directly connect with van battery or you can add an external batteery to connect. For All Electric Trucks. Our K-200E / 300E / 400E / 500E is for all electric truck from 2-26m³ truck box.