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Smart EQ Fortwo / Forfour ED4 2017-2024 17.6 kWh total (16.7 kWh usable) battery pack

Smart EQ Fortwo / Forfour

ED4 2017-2024 17.6 kWh total (16.7 kWh usable)

Pack size
17.6 kWh
Capacity
52 Ah
Chemistry
NMC (Deutsche ACCUmotive / LG Chem 96s)

Technical specifications

Electrical and control

Nominal voltage350 V
Operating range260–400 V*
ProtocolCAN bus (500 kbps), Mercedes/Daimler EV-CAN.
Home use (V2H)Supported via Battery-Emulator (stationary home storage)*
Coolingliquid
Battery-Emulator supportWork in progress · GitHub
Built-in contactorsYes (source)

Physical

Dimensions1150 x 780 x 240 mm
Weight160 kg
Cell configuration96s
ConnectorType 2
ConnectorsType 2.

Pricing

Usedfrom £1,535

* Data sourced from dalathegreat/Battery-Emulator firmware driver specifications and the Battery-Emulator Wiki.

How it works

96s LG pouch cells inside an aluminum tray with bottom liquid cooling. Mercedes BMS communicates over 500 kbps CAN.

Notes

Manufactured by Mercedes-Benz subsidiary Deutsche ACCUmotive using LG Chem NMC pouch cells in 96s (3 modules of 32 cells). Operating voltage range 260.0–400.0 V*. Very compact and light (160 kg), making it a prime candidate for residential domestic installs.

Red flag

Internal contactors require simulated wake CAN messages; liquid cooling circuit should be looped with glycol coolant.

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