Eligibility criteria for solar water heater to be financed under the REECL Programme

Definition:

Solar thermal products for hot water generation covered by EN 12975 and EN 12976 including systems for space heating:

Eligibility Criteria:

Flat plate collectors:

Conversion factor: > 0.75, Loss coefficient a1: < 4 W/m² K or

Annual solar yield, domestic hot water: > 600 kWh/m² (*)

Evacuated tube collectors:

Conversion factor: > 0.75, Loss coefficient a1: < 1.5 W/m² K or

(*) Climate: Sofia, collector orientation: South, cold water: 10°C, hot water: 50°C--