myenergi Solar Inverters

The idea behind myenergi was simple: charge an electric car with your own solar power. Lee Sutton and Jordan Brompton founded the company in 2016 in Grimsby, Lincolnshire, where it still has its headquarters and manufacturing, and their first products were zappi, a solar-aware EV charger, and eddi, a diverter that sends surplus solar into a hot water tank.

Backed early by angel investors including former Tesco chief executive Sir Terry Leahy, and later by a £30 million investment from Energy Impact Partners, myenergi announced libbi, its first home battery, in November 2022, built to work alongside zappi and eddi.

myenergi inverter range

The only inverter in the line-up is the one inside libbi. It is a single-phase hybrid with two trackers for solar panels, sold as a package of inverter and battery. The base system pairs a 3.68 kW inverter with a 5.1 kWh battery; up to three more modules take storage to 20.4 kWh, and above 5.1 kWh the inverter can be upgraded to 5 kW.

The model code reads the same way: in LIBBI-510Sh the 5 is the inverter power in kilowatts and the 10 the battery capacity in kilowatt-hours, so a LIBBI-305Sh is the 3.68 kW inverter with 5 kWh.

What myenergi is known for

Getting the most out of surplus solar. libbi, zappi and eddi are designed to work together, so spare solar can go to the car, the hot water or the battery. The trade-off is scope: libbi is a single-phase home product, not a general-purpose inverter range.

Matching panels to a myenergi libbi

libbi accepts up to 580 V on each of its two maximum power point trackers (MPPT) and tracks between 80 and 560 V. In a British winter a string’s open-circuit voltage rises roughly 8–10% above the datasheet figure, so ten 49 V panels reach about 535 V, within the limit, while eleven would pass 580 V on a frosty morning. Two strings, one per roof face, suit the two trackers.

Each tracker takes 15 A with an 18 A short-circuit ceiling. Many 430–450 W panels built on 182 mm cells run at 13–14 A and fit, but 210 mm cell panels at 17–18 A would be clipped and can exceed the short-circuit limit. The string calculator checks your panel against libbi’s cold-weather voltage, MPPT window and per-tracker current.