Bez kategorii

Introduction

The Renault Twizy was Europe’s most popular quadricycle EV between 2012–2023, with over 32 000 sold. The tiny 6.1 kWh battery pack (52V nominal, 100 cells LiFePO4-ish LiNMC) seems too small for home storage — until you realize you can stack them.

This guide explains how to reuse Renault Twizy battery packs for DIY home solar storage — especially attractive because Twizy packs are incredibly cheap in 2026 (€300–€600 per pack) and 48V-compatible with common home storage inverters.

Twizy battery specs

Nominal voltage: 52V (14S configuration)
Capacity: 6.1 kWh (approximately)
Chemistry: LiCoNi (NCA-like) — Samsung SDI cells
Weight: ~100 kg per pack
Communication: proprietary Renault CAN bus

SoH retention: Because Twizy owners don’t drive far (~50 km/day average), most packs still show 80–90% SoH even after 8+ years.

What you need

1. Twizy packs (1–5 units)

Used market: Leboncoin, eBay France, Renault Twizy parts specialists. €300–€600 per pack with >75% SoH.

2. BMS-EV Controller for Renault Twizy

The Twizy BMS is a Samsung SDI unit with unusual heartbeat requirements. Renault refuses to sell service software publicly, but BMS-EV Controller for Renault Twizy handles:

Renault-specific CAN wake-up
Cell voltage per pack (14 cells × N packs)
Temperature monitoring
Multi-pack coordination (up to 8 packs)

Price: €500 + €200 for Multi-Pack module (if >1 pack).

3. 48V solar inverter (much cheaper than HV!)

For Twizy stack you can use cheap 48V inverters widely available:

Growatt SPF 5000ES / SPF 5000TL — €800–€1 200
Deye SUN-5K-SG04LP1-EU (48V hybrid) — €1 100–€1 400
MPP Solar LV5048 — €650–€900
Voltronic InfiniSolar V — €1 200–€1 500

4. Enclosure + cables

Simple ventilated cabinet (LiCoNi is stable)
48V bus bars (copper, 100A+ per pack)
DC breakers

Budget: €300–€500.

ROI in 2026

Small home consumption (5 000 kWh/year), 6 kWp PV:

Extra self-consumption with 18 kWh Twizy stack: 46% → 78%
Annual savings: ~€620
Payback: 6.3 years
Twizy pack cycles remaining: ~2 500 (10+ years at 1 cycle/day)

Safety notes for Twizy packs

48V is not “low voltage” in DC terms — still capable of significant arc/burn injury
Battery cells contain lithium — treat with respect even at low voltage
Cable sizing critical — 200A discharge peaks need 35 mm² minimum
Waterproof enclosure — Twizy packs are NOT waterproof out of car (car provided the seal)

FAQ

Q: Twizy is 52V not 48V — will 48V inverter work?
A: Yes. 48V inverters typically operate 40–60V DC input. Twizy fits perfectly.

Q: Can I mix Twizy packs with other 48V EV packs (like e-bike)?
A: No. Different chemistries and BMS protocols. Stick to Twizy-only for a Twizy stack.

Q: Renault dealer won’t sell me a used pack — where to look?
A: Leboncoin.fr, eBay France/Germany, specialist EV parts sellers (search “Twizy batterie occasion”).

Q: Life expectancy?
A: 10–15 years at typical home cycling (1 cycle/day, 30% DoD).

—