What is TommaTech Uno Atom 3.3 kW Single-Phase Inverter?
This inverter family, whose series name is Atom, is designed for small-scale roofs. The TommaTech Uno Atom 3.3 kW Single-Phase Inverter delivers 3.3 kVA of nominal power, has a single-phase AC output, measures 267 × 328 × 116 mm and runs quietly with natural cooling; it is positioned as one of the mid-power steps of the family.
At this power level the upper limit for the PV array is 4950 Wp, which is about 1.5 times the nominal AC power and lets the inverter use its rated power for longer as irradiance changes through the day. The maximum input current is 14 A, and the highest AC current at the output is 14.3 A.
The low start-up voltage (70 V) and the MPPT lower limit, which goes down to 55 V, help production start even in the morning and evening hours when irradiance is weak.
Key technical specifications
| Feature | Value |
|---|---|
| Nominal AC power | 3300 VA |
| Max. PV array power | 4950 Wp |
| Max. DC voltage | 550 V |
| MPPT voltage range | 55-530 V |
| Start-up voltage | 70 V |
| Number of MPPTs | 1 |
| Max. AC current | 14.3 A |
| Max. efficiency | 98% |
| Protection rating | IP65 |
| Dimensions (W × H × D) | 267 × 328 × 116 mm |
| Weight | 6 kg |
Which projects is it suitable for?
3.3 kVA is a suitable power class for detached houses and small business roofs aiming to cover the daytime consumption and air-conditioning load of a family of three to five.
Use in Antalya and Solar Nexo support
In sunny Antalya, the success of a small inverter depends on correct placement: a shaded wall, free airflow and keeping cable runs short. The IP65 housing gives flexibility outdoors; the Solar Nexo team manages the process from mounting through commissioning and provides technical support afterwards. The datasheet can be downloaded from the document section on the page; our engineering team can help with technical details.
