VW MEB + GoodWe EH / ET Integration

Reusing a Volkswagen MEB battery pack (ID.3, ID.4, Skoda Enyaq, Audi Q4 e-tron) with a GoodWe EH single-phase or ET three-phase hybrid inverter. Covers both NMC and LFP MEB variants.

Short answer. A VW MEB pack (48/62/77/82 kWh, 310–460 V DC on NMC; ~290–365 V on LFP) fits inside the GoodWe EH single-phase battery input of 100–500 V and the ET three-phase battery input of 180–600 V. The BMS-EV controller emulates a BYD Battery-Box Premium HVS stack — GoodWe supports this natively. Chemistry (NMC vs LFP) is auto-detected from the MEB BMS.

What works

VW ID.3, ID.4, ID.5, ID.7 — 45 to 86 kWh variants.
Skoda Enyaq iV 55/62/77/82 kWh.
Audi Q4 e-tron 45/55/77/82 kWh.
Cupra Born 45/58/77 kWh.
Both NMC and LFP MEB chemistries.
GoodWe EH single-phase (100–500 V, 3–8 kW) and ET three-phase (180–600 V, 5–30 kW).

Supported inverter models

Inverter	Battery DC range	Power	Phase	Notes
GoodWe GW3600-EH	100–500 V	3.6 kW	Single-phase	MEB NMC 310–460 V fits, LFP 290–365 V fits
GoodWe GW5000-EH	100–500 V	5.0 kW	Single-phase	MEB fits
GoodWe GW6000-EH	100–500 V	6.0 kW	Single-phase	MEB fits
GoodWe GW8000-EH	100–500 V	8.0 kW	Single-phase	MEB fits, NMC peak ~460 V within 500 V cap
GoodWe GW5K-ET	180–600 V	5 kW	Three-phase	MEB NMC fits from ~20% SoC upward
GoodWe GW10K-ET	180–600 V	10 kW	Three-phase	MEB fits
GoodWe GW15K-ET	180–600 V	15 kW	Three-phase	MEB fits
GoodWe GW20K-ET	180–600 V	20 kW	Three-phase	MEB fits
GoodWe GW25K-ET	180–600 V	25 kW	Three-phase	MEB fits
GoodWe GW30K-ET	180–600 V	30 kW	Three-phase	MEB fits

Battery voltage range match

SoC	NMC MEB	LFP MEB	GoodWe EH (100–500 V)	GoodWe ET (180–600 V)
0% cutoff	~310 V	~290 V	Both fit	NMC fits, LFP just above 180 V min
50%	~390 V	~330 V	Both fit	Both fit
100%	~460 V	~365 V	Both fit (below 500 V)	Both fit (below 600 V)

Both GoodWe families cover the full MEB voltage range across chemistries. GoodWe EH is well suited to smaller MEB installations (55–62 kWh, single-phase homes); ET suits larger 77–82 kWh packs and three-phase homes.

CAN protocol mapping

GoodWe EH and ET both accept BYD Battery-Box Premium HV protocol on the BMS-CAN port at 500 kbps:

Battery identifies as BYD HVS/HVM stack.
SoC (0–100%) from MEB BMS → BYD SoC field.
Pack voltage, current → BYD voltage/current frames.
Charge/discharge current limits, temperature-derated by MEB BMS → BYD limit frames.
Chemistry auto-detection: BMS-EV controller reads MEB chemistry ID and applies correct NMC (4.2 V max/cell) or LFP (3.65 V max/cell) voltage envelopes.
Alarm/warning bit mapping to BYD-defined fields.

GoodWe menu (SEMS Portal / installer app): battery type BYD Battery-Box Premium HV.

Wiring architecture

┌─────────────────┐ ┌──────────────┐ ┌──────────────────┐ │ VW MEB pack │ │ BMS-EV │ │ GoodWe EH │ │ │ │ Controller │ │ or ET │ │ (NMC or LFP) │ │ │ │ │ │ │ CAN │ Protocol │ CAN │ │ │ MEB BMS kept │─────►│ translator │─────►│ BMS-CAN port │ │ │ 500k │ BYD HV emu │ 500k │ │ └────┬────────┬───┘ └──────────────┘ └────┬─────────┬───┘ │ HV+ │ HV- │ BAT+ │ BAT- └────────┴─────────────────────────────────────┘─────────┘

Installation requirements

Engineering values below are examples. Final conductor cross-section and protective-device 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).

HV cabling: 25 mm² copper for 5–10 kW, 35 mm² for 15–20 kW, 50 mm² for 25–30 kW inverters.
Contactors: Reuse MEB factory contactors, sequenced by BMS-EV via MEB BMS AUTOSAR gateway (0x2F CRC).
DC fuse: 40–125 A gPV depending on inverter power.
Communication: Shielded twisted-pair CAT-6 between BMS-EV and GoodWe BMS-CAN port.
12 V supply: MEB BMS keep-alive from BMS-EV auxiliary output.
GoodWe firmware: EH firmware ≥ 08.30, ET firmware ≥ 15.00 for stable BYD Premium HV support.
SEMS Portal: Cloud commissioning via SEMS Portal after physical install; battery vendor/model set here.

Known limitations

GoodWe EH single-phase 500 V cap fits MEB NMC (460 V peak) but leaves only 40 V of ceiling headroom — comfortable, but not generous. Practical use has been trouble-free.
GoodWe ET 180 V lower limit means LFP MEB (~290 V min) is fine, but any deep-discharge below ~180 V during commissioning is impossible; charge to at least 20% SoC before enabling ET discharge.
SEMS Portal shows aggregated SoC and power; per-cell voltage/temperature via BMS-EV local web UI.
GoodWe requires cloud SEMS Portal activation for warranty; local operation continues if the cloud is unreachable.
MEB pack must be woken via BMS-EV before GoodWe starts a charge cycle — take-up sequence: 12 V → BMS-EV → MEB BMS → contactor close → GoodWe DC pre-charge → active.

FAQ

GoodWe EH or ET for MEB?

EH for single-phase homes and ≤8 kW installations. ET for three-phase homes or if you want >8 kW charge/discharge. ET's higher voltage window also gives more headroom for NMC MEB.

Does GoodWe accept BYD Battery-Box Premium HV directly?

Yes. BYD Premium HV is a native option in GoodWe SEMS Portal. BMS-EV emulates the stack behaviour so GoodWe sees no difference from a genuine BYD installation.

How does chemistry auto-detect work?

MEB BMS reports chemistry ID on the vehicle CAN bus. BMS-EV reads this at boot and configures voltage envelopes and cell balancing thresholds automatically — no manual setup.

Can I combine MEB battery with GoodWe PV MPPTs?

Yes. GoodWe EH and ET are hybrid inverters with independent PV inputs. Solar and battery share the AC output.

Is off-grid / BPS backup supported?

Yes. GoodWe ET has 100% unbalanced backup with a Backup Box add-on. Discharge current is sized to the MEB BMS limit BMS-EV reports.

How much does a used MEB pack cost?

77–82 kWh MEB packs are ~€4 000–€6 500 in Europe at the time of writing; 55 kWh LFP typically €2 500–€3 500. Prices trend downward as more MEB vehicles reach salvage yards.

Does the MEB pack need a coolant loop?

Not for typical low-cycle stationary use (≤0.3C). At higher C-rates (large 30 kW GoodWe with small 55 kWh pack), a passive fan or coolant loop is recommended in summer.

Order a VW MEB + GoodWe BMS-EV controller

Pre-configured BYD Premium HV, chemistry auto-detect

→

Last updated: 2026-09-18

Current firmware: 15.0.14

Technical author: BMS-EV engineering team (Clima Boost sp. z o.o., Poland)

Reviewer: Jakub Lipiński, founder/lead engineer BMS-EV

Revision: 2026-09-18 — aligned with firmware 15.0.14, SOFAR 180–800 V DC verification, Kia EV6 + SOFAR HYD 15KTL case study reference