Full explanation
ISO 8528-1:2018 defines 4 classes: (1) COP (Continuous Operating Power) — 100% constant load 24/7, longest life; (2) PRP (Prime Power) — unlimited hours at 70% average load with 10% overload 1 h in 12, for farms with frequent and long outages (2–8 h/day); (3) LTP (Limited Time Prime) — 500 h/year at 100%; (4) ESP (Emergency Standby Power) — 200 h/year at 70% load, for rare outages (<2 h/week). During Ukraine's 2022–2025 grid-strike period PRP became the default for large farms. Prices April 2026: ESP 10 kW Honda Euro 5 — UAH 55–75k; PRP 10 kW Stamford/Perkins — UAH 140–200k; PRP 50 kW — UAH 600k; PRP 100 kW — UAH 900k–1.2M. Additional costs: ATS, 200–1,000 L fuel tank, soundproofing, AdBlue/DEF for Stage V. Fuel: low-sulphur diesel DSTU 7688:2015. Winter: CFPP −20°C winter diesel + Grotamar 71/82 biocide additive.