Fronius Reserva 12.6 vs Sessy 2.0 10 kWh
Usable capacity: Fronius Reserva 12.6 12.63 kWh, Sessy 2.0 10 kWh 10.4 kWh. The Fronius Reserva 12.6 is better on 5 of 8 comparable points.
Who wins where
- Fronius Reserva 12.6
- Sessy 2.0 10 kWh
Biggest differences
| Fact | Reserva 12.6 | 2.0 10 kWh |
|---|---|---|
| Min. operating temperature | -20 °C | 0 °C |
| Discharge power (continuous) | 12.1 kW | 1.7 kW |
| Charge power (continuous) | 12.1 kW | 2.2 kW |
| Weight | 153.5 kg | 96 kg |
| Nominal capacity | 13.37 kWh | 11 kWh |
| Usable capacity | 12.63 kWh | 10.4 kWh |
Score per area = position (0–100) relative to all 130 models in this category; higher is better.
| Technical specifications | FroniusReserva 12.6 | Sessy2.0 10 kWh |
|---|---|---|
| General | ||
| Cell chemistry | LFP 1 | LFP 2 |
| Smart charging on dynamic prices | – | Yes 2 |
| Wi-Fi / app | – | Yes 2 |
| Performance | ||
| Usable capacity | 12.63 kWh ✓ 1 | 10.4 kWh 2 |
| Nominal capacity | 13.37 kWh ✓ 3 | 11 kWh 2 |
| Expandable up to | – | 31.2 kWh 2 |
| Charge power (continuous) | 12.1 kW ✓ 1 | 2.2 kW 2 |
| Discharge power (continuous) | 12.1 kW ✓ 1 | 1.7 kW 2 |
| Efficiency | ||
| Round-trip efficiency | 95 % 1 | – |
| Electrical | ||
| Coupling | DC-coupled 1 | – |
| Phases | – | 1 2 |
| Backup power | Yes 1 | – |
| Dimensions & weight | ||
| IP rating | IP65 1 | IP20 2 |
| Min. operating temperature | -20 °C ✓ 1 | 0 °C 2 |
| Width | 772 mm 1 | 410 mm 2 |
| Height | 1,390 mm 1 | 780 mm 2 |
| Depth | 176 mm 1 | 270 mm 2 |
| Weight | 153.5 kg 1 | 96 kg ✓ 2 |
| Warranty & lifespan | ||
| Warranted cycles | 6,000 1 | 6,000 2 |
| Warranty | 10 years 1 | 10 years 2 |
Sources
- The Fronius storage solution, V09 Sep 2026 — Fronius International GmbH · accessed 29 Sept 2026
- Sessy 2.0 10 kWh – specificaties, 09/2025 (tekst herkend met OCR) — Sessy B.V. · accessed 27 Sept 2026
- CEC approved solar batteries (Australia) — Clean Energy Regulator (Australian Government), CC BY 4.0 · accessed 29 Sept 2026