Table 1 General specifications and thermal and electrical characteristics of the PVT solar collector.

General specifications

 Empty weight

46.6 kg

 Cell numbers

60

 Absorption plate

Copper

 Thermal conductivity of the plate

385 W m⁻¹ K⁻¹

 Plate dimensions

1645 × 978 × 104 mm

 Capture surface

1.55 m²

 External coil diameter

22 mm

 Cover

Glass

 Cover thickness

4 mm

 Insulation

Rock wool

 Insulation thickness

60 mm

Thermal specifications

 Maximum pressure

6 bar

 Capacity

1.27 L

 Optical performance

0.507

 Coefficient of thermal losses (a1)

4.934 W m⁻²  K⁻¹

 Coefficient of thermal losses (a2)

0.021 W m⁻²  K⁻¹

 Stagnation temperature

148.9 °C

Electrics specifications

 Power

255 W

 Open-circuit voltage (Vac)

37.9 V

 Nominal voltage (Vmpp)

31.25 V

 Short-circuit current (Iac)

9.30 A

 Nominal current (Impp)

8.70 A

 Maximum reverse current

15.0 A

 Maximum system voltage

1000 V