Browse all Marstek solar inverter models. 6 inverters available.
Marstek Energy is a Shenzhen company that started out making power banks before moving into solar, and it is now best known for balcony solar and plug-in home batteries in Europe. Trade press followed its launches: pv magazine covered the Jupiter balcony storage system at SNEC in Shanghai in 2024, and the low-priced Venus A battery in September 2025.
Its products are sold largely online, through the company’s own shops and marketplaces, with Germany’s balcony solar market a main target.
Alongside its batteries, Marstek sells the MST-MI microinverters for plug-in systems, rated at 600, 800 and 1,000 W. Each has two inputs, so one unit serves two panels, and each size comes in W and G versions. The 800 W model matches the output limit that Germany sets for plug-in balcony systems. Marstek’s Jupiter and Venus storage units combine a battery with their own inverter and are separate products.
With a microinverter there is no string to size. Each panel connects to its own input, so check that one panel fits one input. All MST-MI models accept up to 60 V per input and track between 25 and 55 V. A typical 400–450 W panel with an open-circuit voltage around 37–41 V stays safely below 60 V even on a frosty morning, and a larger 144-cell panel near 50 V still fits, with less margin.
Each input takes up to 16 A, enough for large-format panels with 182 mm or 210 mm cells. Power is the practical limit: the 800 W model shares 800 W between two panels, so a pair of 450 W panels will be capped around midday. The string calculator checks your panel against the microinverter’s input limits.