Ingeteam Solar Inverters

In 1972 four engineers — Javier Madariaga, Víctor Mendiguren, Miguel Gandiaga and Alberto Belaustegui — came home from postgraduate studies in Germany and founded TEAM, short for Técnica Electrónica de Automatismo y Medida. That company grew into Ingeteam, a Spanish power-electronics group headquartered in Zamudio, near Bilbao, and still controlled, with a 57.4% stake, by the four founding families.

Solar is only one of its fields. Ingeteam builds converters, generators and control systems for wind, hydro, battery storage, railways, ships, mining and green hydrogen, employs more than 4,000 people in 15 countries and invests about 5% of turnover in research. It entered photovoltaics in the 1990s, and its 2025 central inverter for utility plants reaches 5.4 MW in a single unit.

Ingeteam inverter range

For homes and businesses, everything sits under the INGECON SUN name. The 1Play models are single-phase (3 and 6 kW), the 3Play models three-phase, from 10 kW up to the 110 kW INGECON SUN 110TL M9. The STORAGE versions are hybrids, from 3 to 6 kW single-phase and 10 to 30 kW three-phase.

The suffix is useful: TL marks a transformerless design, and the digit after M on the string models is the number of maximum power point trackers (MPPTs). An INGECON SUN 50TL M4 is a 50 kW unit with four trackers, a 20TL M2 a 20 kW unit with two.

What Ingeteam is known for

Industrial engineering applied to the rooftop. Ingeteam’s background is utility-scale power conversion for wind farms and solar plants, and Wood Mackenzie’s global inverter manufacturer ranking for the first half of 2025 gave it a Grade A accreditation alongside four Chinese makers, just outside the top ten.

For homeowners the line-up is compact: two single-phase string sizes and a handful of hybrids, rather than the dozens of variants some volume brands offer.

Choosing panels for an Ingeteam inverter

The single-phase INGECON SUN 3TL is the tight case: it allows 500 V, tracks from 50 to 490 V on one input and takes 15 A. Ten panels with a 45 V open-circuit voltage read 450 V on the label and nearly 500 V at −10 °C, so nine is the safer count. The STORAGE 1Play hybrids take 550 V but only 13.5 A per tracker, which clips 182 mm-cell modules working near 14 A.

The three-phase models are roomier: the 15TL and 20TL M2 allow 1,100 V and 30 A per tracker, enough for two strings in parallel, but they need at least 160 V to start tracking. The string calculator checks any INGECON SUN model against your panel for cold-weather voltage, the MPPT window and per-tracker current.