DEYE SUN-15K hybrid 3-phase inverter 15 kW (SM2)

The SUN-15K is the lower-power variant in the DEYE SM2 generation series for low-voltage battery systems of 40–60 V. In the Czech Republic it holds the legally valid certificate SZU-B-01549-25 (Strojírenský zkušební ústav – Engineering Test Institute, 19/8/2025) and may be permanently connected to the distribution grid under the rules in force since 1/1/2025.

Asymmetric three-phase output of up to 7.5 kW per phase evens out an uneven distribution of loads across the phases. The inverter automatically compensates for a shortfall on a loaded phase and does not load the free phases. For short peaks it handles 100% overload for 10 seconds — enough to start a compressor, pump or generator without difficulty.

Two independent MPPT trackers (160–650 V) let you connect panels on differently oriented roofs without losing output. Maximum PV input power is 24 kW — a good compromise for medium-sized home PV systems of 12–18 kWp.

A charge/discharge current of 260 A combined with a voltage range of 40–60 V suits a 15S or 16S battery system. Communication with the BMS over CAN or RS-485 — the inverter is fully compatible with BAKOM battery packs.

Smart Load function — a dedicated input/output to which you can connect a generator, a string inverter or an electric water heater. It works much like a power diverter (wattrouter): surplus electricity is intelligently redirected to another load instead of the grid.

Monitoring via the Solarman platform (Wi-Fi, Ethernet or LTE dongle). IP65 protection and an operating range of −40 °C to +60 °C allow installation directly outdoors, with no need for a plant room. Smart air cooling keeps noise below 60 dB.

10-year warranty — the first 5 years cover all parts and labour, the second 5 years cover all parts except the LCD display and fan, excluding labour. The package includes a wall bracket, 4× wall plugs, 3× current sensors 100 A/50 mA, a lead-acid battery temperature sensor and a Wi-Fi dongle.