EV Fluid Heaters

EV fluid heater is electric heater designed to be a heat source for existing heating system used in vehicles with ICE. All vehicle’s heating system design (core heat exchanger, ducts, fans, controls, etc) remain untouched and work the same familiar way, only heat source for liquid is replaced. Unlike ceramic or resistive wire heater option, no under dash modification of existing conventional heater core, air ducts or controls is needed. The heater located outside firewall simply plumbs to the heater core fittings the engine hoses use to connect to, and temperature control / enable switch is installed on the dash. More advanced and sophisticated heater models allow control and diagnostic over CAN bus.


The MMC4000 series heaters are not in production and are not planned to be mass manufactured by MMC. The complete design ownership is for sale to any company or manufacturer to use it as they see fit. As purely design engineering company, MMC has no production capacity or expertise, nor is seeking to establish it. If you’re interested in purchasing ownership of MMC4000 design, please contact MMC for details.

Integrated water pumpOptionOption
Working voltage range200...500 VDC450...900 VDC
Nom. Power4 kW, adjustable4 kW, adjustable
Temperature set point80°C (176°F) max80°C (176°F) max
Temp. AdjustableYesYes
Env. Protection ClassIP67IP67
DimensionsApprox. 240 mm x 120 mm x 75 mmApprox. 240 mm x 120 mm x 75 mm
Weight2 kg2 kg
Special FeaturesIntegrated water pump, CAN controlIntegrated water pump, CAN control
Spec SheetDownloadDownload
User ManualDownloadDownload