Table 1 Specifications of the hot water...

Table 1

Specifications of the hot water heat pump and the solar PV system

Equipment	Specifications	Details
Hot water heat pump	Rated heating capacity	3.6 kW
	Power supply	240 V single phase/10 Amp
	Compressor type	Rotary
	Compressor input capacity	900 W
	Refrigerant	Propane
	Tank storage capacity	260 L
	Maximum water temperature	60 °C when using the heat pump alone, 70 °C when using a heating element
Karra-250Wp PV module	Number of PV panels	12
	Panel dimension (L x W x H)	1,667 $\times$ 1000 $\times$ 40 mm
	Total panel area and installed location	19.2 $m^{2}$ and on a north-facing roof with 5 $°$ pitch
	Reference cell temperature and insolation	25 °C and 1000 W/m²
	Modules short-circuit current at reference conditions	8.8 A
	Module open-circuit voltage at reference conditions	37.7 V
	Module voltage at max power point at reference conditions	30 V
	Module current at max power point at reference conditions	8.3 A
	Number of cells per panel	60
Karra-300Wp PV module	Number of PV panels	24
	Panel dimension (L x W x H)	1,667 $\times$ 1000 $\times$ 40 mm
	Total panel area and installed location	40.0 $m^{2}$ and on a north-facing roof with 30 $°$ pitch
	Reference cell temperature and insolation	25 °C and 1000 W/m²
	Modules short-circuit current at reference conditions	9.65 A
	Module open-circuit voltage at reference conditions	40.1 V
	Module voltage at max power point at reference conditions	32.93 V
	Module current at max power point at reference conditions	9.11 A
	Number of cells per panel	60

Equipment	Specifications	Details
Hot water heat pump	Rated heating capacity	3.6 kW
	Power supply	240 V single phase/10 Amp
	Compressor type	Rotary
	Compressor input capacity	900 W
	Refrigerant	Propane
	Tank storage capacity	260 L
	Maximum water temperature	60 °C when using the heat pump alone, 70 °C when using a heating element
Karra-250Wp PV module	Number of PV panels	12
	Panel dimension (L x W x H)	1,667 $\times$ 1000 $\times$ 40 mm
	Total panel area and installed location	19.2 $m^{2}$ and on a north-facing roof with 5 $°$ pitch
	Reference cell temperature and insolation	25 °C and 1000 W/m²
	Modules short-circuit current at reference conditions	8.8 A
	Module open-circuit voltage at reference conditions	37.7 V
	Module voltage at max power point at reference conditions	30 V
	Module current at max power point at reference conditions	8.3 A
	Number of cells per panel	60
Karra-300Wp PV module	Number of PV panels	24
	Panel dimension (L x W x H)	1,667 $\times$ 1000 $\times$ 40 mm
	Total panel area and installed location	40.0 $m^{2}$ and on a north-facing roof with 30 $°$ pitch
	Reference cell temperature and insolation	25 °C and 1000 W/m²
	Modules short-circuit current at reference conditions	9.65 A
	Module open-circuit voltage at reference conditions	40.1 V
	Module voltage at max power point at reference conditions	32.93 V
	Module current at max power point at reference conditions	9.11 A
	Number of cells per panel	60

Source(s): Authors' own work

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