Fossibot FBP1200
(2 reviews)
The plug-and-play balcony solar battery with a built-in micro-inverter: 1958 Wh expandable to 9790 Wh, up to 1200 W, AI-driven energy management.
Characteristics
- Capacity: 1958 Wh (LiFePO4), expandable to 9790 Wh
- Power: 800 W grid-tied, 1200 W off-grid
- Solar: Input up to 2000 W, compatible with 6 SP420 panels
- All-weather: IP65, from -20 °C to 55 °C, built-in battery heater
- Built-in micro-inverter and AI HEMS, up to €837/year
Detailed overview: Fossibot balcony solar battery
Unveiled at MWC2025 in Barcelona, the Fossibot FBP1200 is a balcony solar storage battery designed to be installed without an electrician: it packs the solar controller, the micro-inverter and the battery into a single unit for a plug-and-play connection to a standard household socket. Its 1958 Wh base capacity relies on EVE-grade LiFePO4 cells, rated for over 6000 charge cycles and a lifespan beyond 17 years, backed by a 10-year manufacturer warranty.
The FBP1200 stands out with two output modes: 800 W fed into the home grid, or up to 1200 W delivered off-grid, useful during a power cut. Solar input accepts up to 2000 W, enough for up to six Fossibot SP420 panels wired in parallel, for a fast charge even on less sunny days. Capacity expands up to 9790 Wh by stacking up to four additional FBP1200-B packs, a modular design built like stackable blocks.
At the heart of the system is its AI-driven home energy management (HEMS): it learns the household's consumption habits, tracks weather and electricity prices in real time, then automatically schedules charging during off-peak hours and discharging during peak demand. Fossibot claims up to 42% off the electricity bill and roughly €837 in yearly savings, for an estimated payback period of 2.8 years. An anti-feed-in mode, driven by a compatible smart meter, prevents any unwanted export back to the grid.
Rated IP65 against water and dust, the FBP1200 operates from -20 °C to 55 °C thanks to a built-in battery heater that kicks in below 0 °C while charging. Its fanless natural convection cooling keeps it silent, a genuine advantage on a lived-in balcony or terrace. It weighs around 24.5 kg for dimensions of 47.6 x 30.8 x 25.7 cm, with two handles for carrying.
Early feedback points to a mobile app that still has room to improve, with a real learning curve and a few interface bugs, as well as an output power that remains modest against power-hungry appliances such as an electric kettle. The backup (UPS) mode switches over in just 1 ms, an asset for sensitive equipment. Still very new to the market, the FBP1200 doesn't yet have a deep track record of reviews, but its plug-and-play positioning and contained price make it a serious option for starting solar storage without major work.
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 (lithium) |
|---|---|
| Nominal voltage?Battery voltage (12, 24 or 48 V). | 19.2 V |
| Capacity?Capacity in amp-hours; multiply by voltage to get energy in Wh. | 102 Ah |
| Energy?Stored energy in watt-hours. | 1958 Wh |
| Cycle life?Rated number of charge/discharge cycles, at the stated depth of discharge. | 6000 cycles |
| Expandable up to?Maximum capacity reachable with add-on modules. | 9790 Wh |
Power and protection
| Output power?Maximum power delivered (for storages with a 230 V output). | 1200 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
| Max solar input?Maximum connectable PV power. | 2000 W |
|---|---|
| Micro-inverter?Power of the inverter that feeds energy back into the home grid. | 800 W |
Connectivity
| 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. | 24.5 kg |
| Dimensions (L × W × H)?Length × width × height, in millimetres. | 476 × 308 × 257 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. | March 2025 |
|---|---|
| Warranty?Length of the manufacturer's warranty. | 10 years |
Comparison
How does the Fossibot FBP1200 compare with other plug-and-play balcony solar batteries, for searches like "FBP1200 vs Jupiter C Plus"? Here is how it stacks up against three well-established references: the Marstek Jupiter C Plus, the Anker Solix Solarbank 2 E1600 and the Growatt NOAH 2000.
| Criterion | Fossibot FBP1200 | Marstek Jupiter C Plus | Anker Solix Solarbank 2 E1600 | Growatt NOAH 2000 |
|---|---|---|---|---|
| Capacity | 1958 Wh | 2560 Wh | 1600 Wh | 2048 Wh |
| Output power | 800 W grid, 1200 W off-grid | 800 W (built-in micro-inverter) | 800 W (built-in micro-inverter) | 800 W (separate micro-inverter) |
| Solar input | 2000 W | 2400 W (4 MPPT) | 1200 W (2 MPPT) | 1800 W (2 MPPT) |
| Expandable to | 9790 Wh | 10240 Wh | 5760 Wh | 8192 Wh |
| Off-grid output (UPS/backup) | Yes, up to 1200 W | No | No | No |
| Observed price | ≈ €599 | ≈ €469 | ≈ €599 | ≈ €389 |
In short, the Fossibot FBP1200 stands out with a feature none of its three rivals offer: a genuine off-grid output up to 1200 W, useful during a power cut, on top of standard grid injection. The Marstek Jupiter C Plus keeps the edge on solar input and raw expandability, and the Growatt NOAH 2000 remains the cheapest option to buy, but neither offers a built-in backup output. For anyone wanting to both cut their electricity bill and keep a usable off-grid energy reserve, the FBP1200 remains a very complete option.
Related video
Video: FOSSiBOT FBP1200 Portable Power Station - Published on 22/02/2026
Our tester's review: Julien De Jurquet
The FBP1200 quickly found its place on our test balcony: two handles, a several-metre cable in the box and a wall socket are all it takes to get it running, no lengthy manual required. The display stays readable in bright sunlight, and the cooling fins stayed barely warm even after several hours of charging in hot weather. The backup mode impressed us with its speed: the 1 ms switchover doesn't faze any sensitive device. The app, on the other hand, takes a bit of patience. The three modes on offer (green plan, custom, smart plug) become genuinely useful once you've got the hang of them, but the interface still has a few rough edges. Another real limit: with 800 W into the grid and 1200 W off-grid, the battery struggles with the hungriest appliances, an electric kettle stalled it during our tests. For a fridge, a router, lighting or charging devices, though, it delivers without a hitch. A young, promising product that could use a bit more output power.
Frequently asked questions: Fossibot balcony solar battery
Yes, in its standard 800 W configuration: installation is designed to be plug-and-play, with no extra wiring, in a matter of minutes. Above 800 W of inverter output, local regulations may require a qualified electrician and registration with the grid operator.
The 800 W figure is the grid-tied injection power for standard balcony use. The 1200 W figure is the off-grid output, usable as a backup battery during a power cut.
By adding up to four FBP1200-B packs, total capacity grows from 1958 Wh to 9790 Wh, with a stackable, modular installation and no complex wiring.
Yes, its off-grid output delivers up to 1200 W and its backup (UPS) mode switches over in about 1 ms, fast enough not to interrupt most sensitive electronics.
Expect around €549 to €699 for the unit alone in early 2026 depending on ongoing promotions, excluding FBP1200-B expansion packs sold separately.
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Published on 25/08/2026