Indevolt SolidFlex 2000
(5 reviews)
A hybrid solar battery with semi-solid LiFePO4 cells, 4 built-in MPPT trackers and 2400 W bidirectional power, expandable up to 66 kWh across 3 stacked groups.
Characteristics
- Capacity: 1792 Wh semi-solid LiFePO4, expandable to 66 kWh
- Solar: 4 x 600 W built-in MPPT, 2400 W max
- Power: 2400 W bidirectional, 10 ms backup switchover
- The only Indevolt model combining direct MPPT and semi-solid cells
Detailed overview: Indevolt semi-solid state hybrid solar battery, 1792 Wh, 2400 W
The Indevolt SolidFlex 2000 is a plug and play hybrid solar battery, built for a household that wants to both store its solar production and guard against power cuts. Its distinguishing feature is its chemistry: semi-solid LiFePO4 cells, which combine the benefits of a solid and a liquid electrolyte to improve thermal stability and waterproofing over a classic LFP battery, while targeting 8000 cycles down to 70% remaining capacity.
On the solar side, the SolidFlex 2000 packs 4 built-in MPPT trackers rated at 600 W each, for up to 2400 W of solar input on the standalone unit: unlike other balcony batteries that require a third-party inverter, it can accept new panels with no extra hardware. It still stays compatible with 99% of existing PV installations through AC coupling, for anyone who would rather keep their current inverter in place.
The native 1792 Wh capacity can be extended per group up to 22 kWh by adding SFA1800 (1792 Wh) or SFA3600 (3584 Wh) expansion batteries, freely mixable thanks to Indevolt's BatteryFlex technology. By stacking up to 3 groups in parallel, total capacity climbs to 66 kWh and solar input to 7200 W, enough headroom for a household with growing needs.
During a power cut, an off-grid output switches automatically in under 10 milliseconds, with a backup power rating of 1000 W on the standalone unit, 2000 W with one SFA1800, and up to 2400 W with two SFA1800 units or one SFA3600. The IP65-rated enclosure operates from -20 °C to 55 °C, suitable for outdoor installation (balcony, garage, garden). Control runs through the Indevolt app, compatible with dynamic electricity tariffs, with Bluetooth, 2.4 GHz Wi-Fi, optional 4G and LoRa connectivity, plus API integration with third-party systems such as Home Assistant or Shelly meters. The whole system is backed by a 10-year manufacturer warranty.
Full specifications
Detailed characteristics
Battery
| Technology?Battery chemistry; LiFePO4 lasts far longer and can be fully discharged, gel/AGM is maintenance-free and cheaper. | LiFePO4 semi-solide |
|---|---|
| Energy?Stored energy in watt-hours. | 1792 Wh |
| Cycle life?Rated number of charge/discharge cycles, at the stated depth of discharge. | 8000 cycles |
| Expandable up to?Maximum capacity reachable with add-on modules. | 66000 Wh |
Power and protection
| Output power?Maximum power delivered (for storages with a 230 V output). | 2400 W |
|---|---|
| Built-in BMS?Battery management system protecting against overcharge, deep discharge, short-circuit and overcurrent (lithium batteries). | Yes |
| Low-temperature protection / heating?Cuts off or heats charging in cold weather to protect the lithium cells. | Yes |
Solar section
| MPPT controllers?Number of built-in MPPT solar controllers (lets you connect panels facing different directions). | 4 |
|---|---|
| Max solar input?Maximum connectable PV power. | 2400 W |
| Micro-inverter?Power of the inverter that feeds energy back into the home grid. | 2400 W |
Connectivity
| Bluetooth?Monitoring and settings via an app over Bluetooth. | Yes |
|---|---|
| Wi-Fi?Remote control and updates over Wi-Fi. | Yes |
Durability and format
| Ingress protection?Water and dust resistance (IP rating). | IP65 |
|---|---|
| Maintenance-free?Sealed battery needing no water top-up (gel / AGM). | Yes |
| Weight?Weight of the battery. | 21.5 kg |
| Dimensions (L × W × H)?Length × width × height, in millimetres. | 425 × 195 × 260 mm |
Availability and warranty
| Market launch?Date the model first became available on the European market. Useful to place its generation: technology moves fast in this segment, and a device several years old may be at the end of its commercial life. | November 2025 |
|---|---|
| Warranty?Length of the manufacturer's warranty. | 10 years |
Comparison
How does the Indevolt SolidFlex 2000 compare with other hybrid solar batteries, for searches like "best balcony solar battery with MPPT"? Here is how it stacks up against two references already in the catalogue: the Growatt NOAH 2000, a more affordable balcony battery without built-in MPPT, and the Zendure SolarFlow 3000 Mix AC+, positioned in a higher power segment.
| Criterion | SolidFlex 2000 | Growatt NOAH 2000 | Zendure SolarFlow 3000 Mix AC+ |
|---|---|---|---|
| Capacity | 1792 Wh, expandable to 66 kWh | 2048 Wh, expandable to 8192 Wh | 8000 Wh, not expandable |
| Built-in MPPT | Yes, 4 x 600 W (2400 W) | No, separate microinverter required | No, third-party inverter required |
| Bidirectional power | 2400 W | Separate microinverter | 3000 W |
| Battery technology | Semi-solid LiFePO4 | LiFePO4 | LiFePO4 |
| Observed price | €799 | ≈ €389 | €1999 |
In short, the SolidFlex 2000 stands out as the only one of the three to combine a directly built-in MPPT with semi-solid chemistry, a unique profile against the notably cheaper NOAH 2000, which still needs a separate microinverter, and against the more powerful but pricier SolarFlow 3000 Mix AC+, which has no MPPT of its own. For a household that wants to add new panels without extra hardware while keeping a contained budget, it is a solid compromise.
Related video
Video: INDEVOLT SolidFlex 2000 : la première batterie LFP semi-solide du marché pour la maison ⚡️ - Published on 12/11/2025
Our tester's review: Julien De Jurquet
The SolidFlex 2000 first stands out for its semi-solid cell technology, a first on this balcony battery segment: Indevolt claims better thermal stability and stronger waterproofing than classic LFP cells, and in practice the unit inspires confidence, with a sturdy enclosure and a clear app for tracking production. The install stays true to the plug and play spirit: direct MPPT inputs for new panels, or AC coupling with an existing inverter, whichever suits you. The under-10-ms backup switchover does its job during outages, within the limit of 1000 W without an expansion battery (up to 2400 W with an SFA1800 or SFA3600). Two honest caveats: without expansion, backup power stays modest, and the price climbs quickly once you add SFA modules. But for a household that wants to combine direct MPPT with extra safety margin, it is a solid pick from Indevolt.
Frequently asked questions: Indevolt semi-solid state hybrid solar battery, 1792 Wh, 2400 W
Yes, that is one of its distinguishing features: it packs 4 built-in MPPT trackers (2400 W total), so it can accept new solar panels without a third-party inverter. It also stays compatible with AC coupling to an already installed inverter.
It is an evolution of classic LFP technology that combines a solid and a liquid electrolyte, for better thermal stability, stronger waterproofing and a lower risk of internal short circuit, while targeting 8000 cycles down to 70% remaining capacity.
The native 1792 Wh capacity can reach 22 kWh per group by adding SFA1800 or SFA3600 batteries, and up to 66 kWh by stacking 3 groups in parallel, with solar input raised to 7200 W.
The off-grid output switches in under 10 milliseconds: 1000 W on the standalone unit, 2000 W with one SFA1800 battery, and up to 2400 W with two SFA1800 units or one SFA3600.
Yes, its enclosure is IP65-rated and operates from -20 °C to 55 °C, which suits installation on a balcony, in a garage or in a garden, away from prolonged direct exposure.
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Published on 24/08/2026