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Renault Zoe + GoodWe ET / EH

Pairing a Renault Zoe pack with a GoodWe ET / EH hybrid inverter through a BMS-EV controller: what the voltage windows allow, which protocol is emulated, and what to check before commissioning.

Voltage window match

Confirm the actual full-charge and empty voltages of the specific pack you are installing. Pack revisions within a family can shift these figures, and a window that fits on paper can be marginal in practice at the top of charge.

Pack architecture

• Variants covered: Gen1 22 kWh (Q210/R240), Gen1 41 kWh (ZE40, R90/Q90), Gen2 52 kWh (ZE50)
• Cell configuration: ZE40: 96s2p, 192 LG Chem LGX E63 pouch cells (3.6 V / 65.6 Ah). ZE50: 96s2p, 192 LG Chem LGX E78 pouch cells (3.65 V / 78 Ah, NCM 712 — not LFP)
• Chemistry: NMC (LG Chem) across all generations
• Thermal management: Air (passive), with a heater option on later builds
• Source: pushevs.com Zoe ZE40 and Zoe Gen2 teardowns; openinverter.org Renault Zoe battery pack wiki

Full pack detail: Renault Zoe battery reference page.

Protocol and contactor architecture

• Pack side: Renault native CAN at 500 kbit/s.
• Inverter side: BYD Battery-Box derived frame set over CAN 500 kbit/s.
• Contactor control: Contactor sequencing (precharge then main) is driven by the original Renault CMM (contactor management module). The BMS-EV controller wakes the CMM with the expected frame set and reads pack telemetry; it does not drive the contactor coils.
• Controller role: the BMS-EV controller wakes the pack BMS, reads state of charge, cell voltage extremes, temperatures and the BMS-reported charge/discharge current limits, and re-encodes them for the inverter. It does not command cell balancing, does not set its own current limits and does not drive contactor coils.

Protocol background: EV battery CAN communication · GoodWe inverter reference.

Known limitations

• Gen1 22 kWh and Gen1 41 kWh use the same CAN message family but different scaling factors and byte order. Firmware must match the exact model year — specify it at ordering.
• ZE50 was widely mis-reported as an LFP pack. It uses LG Chem NCM 712 pouch cells. Charge limits set for LFP will under-utilise it.
• The pack is air-cooled. At sustained high C-rate the module temperature spread widens more than on a liquid-cooled pack; residential duty cycles (0.1–0.2 C) are well within its design envelope but validate airflow in your enclosure.
• Cable, fuse and disconnect sizing shown anywhere in this documentation is an engineering example. Final sizing must be calculated for the actual pack, maximum current, cable length, installation method, ambient temperature and applicable local standards (IEC 60364-7-712, VDE-AR-N 4105, NEC 690).

Before you order

1. Confirm the exact pack variant, capacity and model year — firmware differs across variants within this family.
2. Confirm the exact inverter model, not just the family — battery DC windows differ across models in the same range.
3. Measure pack state of health and isolation resistance before commissioning. See Safety.
4. Check that the installation meets the system-level requirements for stationary storage in your jurisdiction. OEM automotive validation of the pack does not carry over to a stationary ESS — see Compliance.

Order this configuration

Renault Zoe + GoodWe ET / EH — firmware configured and bench-tested for this pair

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