INV Series single-phase off-grid hybrid inverter, 1.2–10.5 kW

One platform, six power classes

The INV covers the range most off-grid systems actually need: 1.2 kW for a cabin, 3.6 kW for a small house, 10.5 kW for a workshop with a welder. The inverter topology is the same across the series — high-frequency PWM, pure sine wave, a 100 A MPPT charger — so the installation manual, the monitoring app and the spare-parts list are shared.

What changes with power class is the battery voltage. The 1.2 and 2 kW units run on 12 V, the 3.6 and 5 kW on 24 V, and the 6.5 and 10.5 kW on 48 V. That progression matters: at 12 V a 2 kW load draws 167 A, which needs cable most installers would rather not pull.

Surge, transfer and dual output

The 200 % peak rating lasts ten seconds — long enough to start a fridge compressor, a circular saw or a 1 hp well pump. For loads with a longer inrush, parallel a second unit rather than relying on the surge rating repeatedly.

The transfer time is under 10 ms, which is fast enough that most IT equipment rides through without a UPS. The dual AC output lets you put critical loads on one terminal and shedable loads on the other; when the battery drops below a set state of charge, the inverter drops the second circuit first.

Charging from solar and grid together

The MPPT charger takes 40–450 V on the 24 V and 48 V models, which covers four to eight 550 W panels in series without a separate charge controller. Grid charging is programmable by time window, so a site on a time-of-use tariff can charge at night and discharge into the evening peak.