On paper: a technically solid compact station
With 538 Wh of capacity, a LiFePO4 chemistry claimed for 3000 cycles at 80 % and 600 W of continuous power (1200 W in Watt+ mode), the Growatt Vita 550 targets the same uses as rival compact stations: camping, van life, occasional remote work. It stands out with a particularly fast mains recharge and very generous connectivity for its class. Growatt, better known for its home solar inverters, brings real technical know-how to it, but the product's distribution in France now raises questions.
A backup function, not a true uninterruptible power supply
The maker's messaging highlights a backup function for mains outages. In practice, this is not a true uninterruptible power supply (UPS) in the strict sense: it is impossible to power a device and recharge the station at the same time, since the mains output cuts out during charging. An emergency power system (EPS) mode does exist and automatically switches the output over if the grid fails during a charge, but the maker's own documentation states that this is a non-professional function, without instant switchover, and advises against using it for equipment sensitive to power continuity. A buyer looking for true UPS protection for a computer or network equipment should look elsewhere.
Watt+ mode: 1200 W reserved for resistive appliances
Watt+ mode (1200 W, against 600 W continuous) lowers the voltage supplied to the connected device to widen the available power range. The maker explicitly reserves it for resistive appliances: iron, hair dryer, space heater, air fryer, kettle, coffee maker. It states that it does not support appliances with strict voltage requirements, wording that implicitly targets regulated electronics and motors. No test with a motor-driven appliance (drill, pump, compressor) has been documented to confirm this limit in practice. Another point worth knowing: Watt+ mode is off by default and only turns on from the app.
Delivered capacity
Delivered capacity actually falls between 82 and 84 % of the claimed figure on the mains output, or about 440 to 450 Wh out of the claimed 538 Wh, under a 300 to 350 W load. On the DC/USB output, delivered capacity climbs to about 93 %, or 503 Wh, a gap consistent with the usual conversion losses of an inverter. These two figures corroborate each other, which strengthens their reliability.
Fan: noisy while charging, quiet on light discharge
The fan is clearly audible during mains charging, even at a modest charging power. During plain low-power discharge, by contrast, it stays quiet: the perceived noise level therefore depends heavily on the operating regime (charging or discharging) rather than on any inconsistency between the figures themselves.
Bluetooth, Wi-Fi and app: all present, reliability uneven
The station can also be controlled from a mobile app (myGro, over Bluetooth and Wi-Fi), which shows the charge status, enables Watt+ mode and allows remote control. The experience remains uneven from one device to another: Wi-Fi connection or account creation difficulties arise, particularly on iOS, while other setups find it runs smoothly. An induction charging pad (about 15 W) is built into the top, handy for a compatible smartphone.
Connectivity: ten outputs, with a few caveats
With ten outputs in total, the Vita 550 remains very well equipped for its class: two 230 V mains sockets (against three on the North American version of the same product), one 100 W USB-C port, three USB-A ports (only one delivering the full 18 W, the other two staying more limited), a 12 V car socket and DC outputs. The LCD screen shows the essentials without needing the app for basic use.
The most important point: still finding it in France
The price observed is 399 €, down from the European launch price of 599 € in 2023. But the product's actual availability in France now raises questions, beyond the already known fact that distribution is focused on the North American market. Several signals converge: the sales channel identified by this site shows an out-of-stock status with no restocking date announced, the maker's official product pages for this model are no longer accessible, and the Vita range has disappeared from the maker's current catalogue in favour of newer ranges. A buyer interested in this station must check its actual availability before any purchase, rather than relying on the listed price alone.
Who it suits, and who it does not
It suits anyone who finds a unit in stock and wants a compact station with fast recharging, good connectivity and durable LiFePO4 chemistry, without needing a true UPS function.
It does not suit anyone who needs reliable uninterruptible protection for sensitive equipment, or anyone who prefers to buy from an established, lasting sales channel in France.
