Full explanation
Key functions: (1) MPPT tracker(s) for PV (2–3 independent inputs allow panels with different orientations); (2) Battery Management — charge/discharge LFP or LiIon; (3) Grid-tie — surplus sales under Net Billing; (4) EPS (Emergency Power Supply) — on grid failure, automatically shifts critical loads to battery+PV within 10–20 ms. Price April 2026: 10 kW Deye SUN-10K-SG01 UAH 50–70k; 15 kW Huawei SUN2000-15KTL UAH 75–95k; Fronius GEN24 Plus 10 kW UAH 90–115k (European quality, 10-year warranty). Cheap no-brand Chinese inverters are 40–50% of the price but fail in 2–4 years. Critical farm settings: (1) charge priority — Grid-Charge-Min (charge from grid to 30–40% if outage forecast); (2) EPS settings — immediate or 1–3 s delay; (3) export limit (0–100% of rated) per oblenergo requirements. Certification: DSTU IEC 62109-2:2015 is mandatory; DSTU EN 50549-1:2019 for grid connection.