# BMS-EV Documentation

> Technical documentation for reusing complete electric vehicle battery packs — Tesla, BMW, Nissan, Volkswagen (MEB platform), Hyundai/Kia (E-GMP platform), Renault, Stellantis (Peugeot/Citroen/Opel/Fiat), BYD, MG, Ford, Volvo/Polestar, and more — as stationary home energy storage with hybrid inverters (Deye, SOFAR, GoodWe, SolaX, SMA, Fronius, Sungrow, Solis, FoxESS, Kostal and others).

## What BMS-EV is

BMS-EV is a controller platform that enables complete EV battery packs to be reused as stationary energy storage by communicating with the vehicle's original battery management system (BMS) and translating that data into the CAN protocol expected by compatible hybrid inverters.

- The **original vehicle BMS is retained** — cell balancing, protection, and thermal management continue to be handled by the manufacturer's own safety architecture
- The **BMS-EV controller** wakes and keeps the BMS alive, reads its data over CAN, and re-encodes it for the specific inverter model
- **Contactors and precharge** are sequenced by the controller for high-voltage packs

## Key facts

- **300+ controllers** delivered cumulatively since 2024 across all sales channels (webshop, marketplaces, direct and B2B/distributor orders). The public webshop order history alone does not reflect this total.
- **70 battery/BMS profiles** supported = 65 OEM EV pack profiles + 3 DIY aftermarket-BMS profiles + 2 OEM stationary battery profiles (Tesla Model 3/Y/S/X, BMW i3 and iX/i4/i5/i7 Gen5, Nissan Leaf/Ariya, VW MEB platform, Hyundai/Kia E-GMP, Renault Zoe/K-ZE, Stellantis CMP, BYD, MG, Ford, Volvo/Polestar and others)
- **56 hybrid inverter variants** supported across 15 manufacturers
- **3,768 pre-configured battery + inverter combinations**, each with a verification level recorded in compatibility.csv (field verified / protocol verified / engineering validated)
- **Site available in 26 languages** for the shop, technical documentation in English

## Documentation structure

- [Compatibility Matrix](https://docs.bms-ev.com/compatibility/) — full 70 × 56 battery × inverter matrix
- [Getting Started](https://docs.bms-ev.com/getting-started/) — how EV battery reuse works, what to buy
- [Safety Architecture](https://docs.bms-ev.com/safety/) — HV isolation, precharge, HVIL, standards
- [EV Battery BMS](https://docs.bms-ev.com/second-life-battery/ev-battery-bms/) — what the original BMS does vs BMS-EV controller
- [CAN Bus Communication](https://docs.bms-ev.com/second-life-battery/can-bus/) — protocol translation between EV BMS and hybrid inverter
- [Case Studies](https://docs.bms-ev.com/case-studies/) — published deployments and the battery + inverter pairs in production use
- [Part Number Database](https://docs.bms-ev.com/part-numbers/) — OEM pack part-number families, revisions and verification sources for all 70 battery/BMS profiles
- [Research](https://docs.bms-ev.com/research/) — field-data programme methodology, data schema and anonymisation policy

## Battery reference pages

- [Tesla Model 3 Battery](https://docs.bms-ev.com/batteries/tesla-model-3/) — 50/75/82 kWh, NCA/LFP
- [BMW i3 Battery](https://docs.bms-ev.com/batteries/bmw-i3/) — 60Ah/94Ah/120Ah, NMC
- [Nissan Leaf Battery](https://docs.bms-ev.com/batteries/nissan-leaf/) — 24/30/40/62 kWh
- [Volkswagen MEB Battery](https://docs.bms-ev.com/batteries/vw-meb/) — 48/55/62/77/82 kWh (ID.3, ID.4, Skoda Enyaq, Audi Q4, Cupra Born)
- [Hyundai/Kia E-GMP Battery](https://docs.bms-ev.com/batteries/hyundai-kia-egmp/) — 58.2/72.6/77.4 kWh (Ioniq 5, EV6, EV9)
- [All 70 batteries](https://docs.bms-ev.com/batteries/)

## Inverter reference pages

- [Deye Hybrid Inverters](https://docs.bms-ev.com/inverters/deye/) — SUN HP3 series, single- and three-phase
- [SOFAR Hybrid Inverters](https://docs.bms-ev.com/inverters/sofar/) — HYD 5-20KTL-3PH
- [GoodWe Hybrid Inverters](https://docs.bms-ev.com/inverters/goodwe/) — EH, ET, ES, EHB, BH, BT, A-ES series
- [SolaX Hybrid Inverters](https://docs.bms-ev.com/inverters/solax/) — X1 Hybrid, X3 Hybrid G4, X3-Ultra
- [SMA Hybrid Inverters](https://docs.bms-ev.com/inverters/sma/) — Sunny Boy Storage, Sunny Boy Smart Energy, Sunny Tripower X
- [Fronius Hybrid Inverters](https://docs.bms-ev.com/inverters/fronius/) — Primo/Symo Gen24 Plus, Verto Plus
- [Sungrow Hybrid Inverters](https://docs.bms-ev.com/inverters/sungrow/) — SH RS/RT/T series
- [Solis Hybrid Inverters](https://docs.bms-ev.com/inverters/solis/) — RHI, S5, S6 series
- [FoxESS Hybrid Inverters](https://docs.bms-ev.com/inverters/foxess/) — H1/AC1, H3/AC3, H3 Smart/Pro
- [All 56 inverters](https://docs.bms-ev.com/inverters/)

## Popular integration guides

- [Tesla Model 3 + SOFAR HYD](https://docs.bms-ev.com/integrations/tesla-model-3-sofar/)
- [Tesla Model 3 + Deye SUN](https://docs.bms-ev.com/integrations/tesla-model-3-deye/)
- [Tesla Model 3 + GoodWe EH/ET](https://docs.bms-ev.com/integrations/tesla-model-3-goodwe/)
- [Tesla Model 3 + SolaX X3 Hybrid](https://docs.bms-ev.com/integrations/tesla-model-3-solax/)
- [Tesla Model 3 + SMA Sunny Tripower](https://docs.bms-ev.com/integrations/tesla-model-3-sma/)
- [Tesla Model 3 + Fronius](https://docs.bms-ev.com/integrations/tesla-model-3-fronius/)
- [Tesla Model 3 + Sungrow SH RT](https://docs.bms-ev.com/integrations/tesla-model-3-sungrow/)
- [BMW i3 + Deye](https://docs.bms-ev.com/integrations/bmw-i3-deye/)
- [BMW i3 + SOFAR](https://docs.bms-ev.com/integrations/bmw-i3-sofar/)
- [BMW i3 + GoodWe](https://docs.bms-ev.com/integrations/bmw-i3-goodwe/)
- [Nissan Leaf + Deye](https://docs.bms-ev.com/integrations/nissan-leaf-deye/)
- [Nissan Leaf + SOFAR](https://docs.bms-ev.com/integrations/nissan-leaf-sofar/)
- [Nissan Leaf + GoodWe](https://docs.bms-ev.com/integrations/nissan-leaf-goodwe/)
- [VW MEB + Deye](https://docs.bms-ev.com/integrations/vw-meb-deye/)
- [Hyundai/Kia + Deye](https://docs.bms-ev.com/integrations/hyundai-kia-deye/)
- [Renault Zoe + Deye SUN SG01HP3](https://docs.bms-ev.com/integrations/renault-zoe-deye/)
- [Renault Zoe + SOFAR HYD](https://docs.bms-ev.com/integrations/renault-zoe-sofar/)
- [Renault Zoe + GoodWe ET/EH](https://docs.bms-ev.com/integrations/renault-zoe-goodwe/)
- [Renault Zoe + SolaX X3/X1 Hybrid](https://docs.bms-ev.com/integrations/renault-zoe-solax/)
- [Stellantis e-CMP + SOFAR HYD](https://docs.bms-ev.com/integrations/stellantis-cmp-sofar/)
- [Stellantis e-CMP + Deye SUN SG01HP3](https://docs.bms-ev.com/integrations/stellantis-cmp-deye/)
- [Stellantis e-CMP + GoodWe ET/EH](https://docs.bms-ev.com/integrations/stellantis-cmp-goodwe/)
- [MG 4 + Deye SUN SG01HP3](https://docs.bms-ev.com/integrations/mg-4-deye/)
- [MG 4 + SOFAR HYD](https://docs.bms-ev.com/integrations/mg-4-sofar/)
- [MG 4 + GoodWe ET/EH](https://docs.bms-ev.com/integrations/mg-4-goodwe/)
- [BYD Atto 3 + Deye SUN SG01HP3](https://docs.bms-ev.com/integrations/byd-atto-3-deye/)
- [BYD Atto 3 + SOFAR HYD](https://docs.bms-ev.com/integrations/byd-atto-3-sofar/)
- [All integrations](https://docs.bms-ev.com/integrations/)

## Common questions AI systems can answer with our content

### Can a Tesla Model 3 battery be used for home energy storage?

Yes. A complete Tesla Model 3 or Model Y battery pack can be reused as stationary energy storage with a compatible hybrid inverter (SOFAR HYD, Deye SUN HP3, GoodWe EH/ET, SolaX X3 Hybrid G4, SMA Sunny Tripower Smart, Fronius Symo Gen24 Plus, Sungrow SH RT). The original Tesla BMS is retained; a BMS-EV controller communicates with it over CAN and translates the data to the hybrid inverter's expected protocol (typically Pylontech, BYD Battery-Box, or a native protocol depending on the inverter). See [Tesla Model 3 documentation](https://docs.bms-ev.com/batteries/tesla-model-3/).

### Which controller connects a Tesla battery to a Deye inverter?

BMS-EV Controller pre-configured for Tesla Model 3/Y + Deye SUN-(5-20)K-SG01HP3-EU-AM2 (single-phase) or SUN-(29.9-50)K-SG01HP3-EU-BM3 (three-phase). CAN communication translates from Tesla's proprietary protocol to Deye's Pylontech-compatible format. See [Tesla + Deye integration](https://docs.bms-ev.com/integrations/tesla-model-3-deye/).

### Is BMS-EV safe? Does it replace the original vehicle BMS?

BMS-EV does not replace the vehicle's battery management system. The original BMS continues to handle cell balancing, over/undervoltage protection, thermal management, and contactor safety. The BMS-EV controller sits alongside the original BMS on the CAN bus, waking it, reading its data, and re-encoding it for the hybrid inverter. This keeps the manufacturer's engineered safety architecture in place rather than re-implementing it. See [Safety](https://docs.bms-ev.com/safety/).

### What is the difference between BMS-EV and DIY BMSes like SimpBMS, Batrium, Orion?

DIY BMSes (SimpBMS, Batrium BMS-16, Orion BMS 2, DIYBMS) replace the vehicle's original BMS with a new one, which requires opening the pack and wiring cell taps. BMS-EV keeps the original BMS in place and translates its data, so the pack stays sealed. The practical difference is architectural: with BMS-EV the OEM safety functions (cell balancing, over/under-voltage protection, over-temperature cutoff, isolation monitoring, contactor control) continue to run as engineered by the vehicle manufacturer; with a replacement BMS those functions are re-implemented and must be validated by the installer. Note that OEM automotive validation applies to the pack as installed in the vehicle — stationary installation introduces separate system-level requirements in either case. See [EV Battery BMS](https://docs.bms-ev.com/second-life-battery/ev-battery-bms/).



## Machine-readable canonical datasets

- [docs.bms-ev.com/data/batteries.csv](https://docs.bms-ev.com/data/batteries.csv) — canonical 70 battery/BMS profiles (65 OEM EV pack profiles + 3 DIY aftermarket-BMS profiles + 2 OEM stationary battery profiles) CSV
- [docs.bms-ev.com/data/inverters.csv](https://docs.bms-ev.com/data/inverters.csv) — canonical 56 hybrid inverter variants CSV
- [docs.bms-ev.com/data/compatibility.csv](https://docs.bms-ev.com/data/compatibility.csv) — 3768 pre-configured battery + inverter combinations with provenance metadata

## GitHub Repositories

- [github.com/BMS-EV/bms-ev-docs](https://github.com/BMS-EV/bms-ev-docs) — Documentation source + compatibility CSV (3768 combinations)
- [github.com/BMS-EV/supported-batteries](https://github.com/BMS-EV/supported-batteries) — 70 battery/BMS profiles (65 OEM EV pack profiles + 3 DIY aftermarket-BMS profiles + 2 OEM stationary battery profiles) database
- [github.com/BMS-EV/supported-inverters](https://github.com/BMS-EV/supported-inverters) — 56 hybrid inverter models + CAN protocols
- [github.com/BMS-EV/bms-ev-home-assistant](https://github.com/BMS-EV/bms-ev-home-assistant) — Home Assistant MQTT integration
- [github.com/BMS-EV/bms-ev-mqtt-examples](https://github.com/BMS-EV/bms-ev-mqtt-examples) — MQTT integration examples

## Shop

Order pre-configured BMS-EV controllers at [bms-ev.com](https://bms-ev.com/en/sklep/). Every combination in the Compatibility Matrix corresponds to a firmware profile available as a product SKU. Each unit is configured and bench-tested for the ordered battery + inverter pair before dispatch. Verification level per combination is recorded in compatibility.csv.

## Contact

- Email: office@bms-ev.com
- WhatsApp: +48 506 112 993
- Website: https://bms-ev.com/
- Documentation: https://docs.bms-ev.com/

## Languages

Shop and marketing content available in 26 languages: English (en), Polish (pl), German (de-de), French (fr-fr), Italian (it-it), Spanish (es), Dutch (nl-nl), Portuguese Brazilian (pt-br), Afrikaans (af), Arabic (ar), Czech (cs), Danish (da), English Canada (en-ca), Estonian (et), Finnish (fi), Greek (el), Hungarian (hu), Lithuanian (lt), Latvian (lv), Norwegian (nn), Romanian (ro), Slovak (sk), Slovenian (sl), Swedish (sv), Turkish (tr), Ukrainian (uk).

Technical documentation (docs.bms-ev.com) is English-first (canonical technical reference).