Comparison solar Collectors

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	ALTEK SD-T2L-10	Roda RSSCV20C	ALTEK SD-T2-24	ALTEK SC-LH2-10	Viessmann Vitosol 100-FM SV1F	ALTEK SC-LH3-30	ALTEK AC-VGL-25	WOLF CFK-1	Atmosfera RNB 58-1800/30-250	Atmosfera RPA 58-1800/20-170	Atmosfera RPA 58-1800/24-200	Vaillant auroTHERM VFK 145V	ALTEK AC-VG-50	ALTEK SC-LH2-30	Atmosfera SPK F4M	Eldom VHP 12	Paradigma Aqua Paket 3xAqua Plasma 15/40	Solar-Tec PHP-58/1800/20	Star Energy SVK-20/14 Ekonom	Axioma AX-10HP24	Axioma AX-20HP24	Axioma AX-30T	Axioma AX-20T	Sun Rain TZL58/1800-20	Sun Rain TZ58/1800-30R1A	ALTEK SC-HD-30 Drainback	ALTEK Premium TZ58/1800-30R1A	WOLF Topline TopSon F3-1	Bosch Solar 4000 TF FCC 220-2V	ALTEK SC-LH3-20	Vaillant auroTHERM VFK 145H	Atmosfera RNB 58-1800/15-130	Atmosfera RNB 58-1800/20-170	Atmosfera RPA 58-1800/30-250	ALTEK SP-C-15	ALTEK SP-C-20	ALTEK SP-C-24	ALTEK SP-C-30	ALTEK SP-H-15	ALTEK SP-H-20	ALTEK SP-H-24	ALTEK SP-H-30	ALTEK SD-T2-10	ALTEK SD-T2-15	ALTEK SD-T2-20	ALTEK SD-T2-30	Atmosfera CBK-Nano-Plus-20	Atmosfera CBK-Nano-Plus-30	Atmosfera CBK-A-20	Atmosfera CBK-A-30
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Type	thermosiphon	flat	thermosiphon	vacuum	flat	vacuum	vacuum	flat	thermosiphon	thermosiphon	thermosiphon	flat	vacuum	vacuum	flat	vacuum	vacuum	thermosiphon	vacuum	vacuum	vacuum	thermosiphon	thermosiphon	thermosiphon	vacuum	vacuum	vacuum	flat	flat	vacuum	flat	thermosiphon	thermosiphon	thermosiphon	thermosiphon	thermosiphon	thermosiphon	thermosiphon	thermosiphon	thermosiphon	thermosiphon	thermosiphon	thermosiphon	thermosiphon	thermosiphon	thermosiphon	vacuum	vacuum	vacuum	vacuum
Loop system	open	closed	open	closed	closed	closed	open	closed	open	closed	closed	closed	open	closed	closed	closed	closed	closed	closed	closed	closed	open	open	open	closed	closed	closed	closed	closed	closed	closed	open	open	closed	closed	closed	closed	closed	closed	closed	closed	closed	open	open	open	open	closed	closed	closed	closed
Mounting	inclined	horizontal	inclined	universal	universal	universal	inclined	inclined /15° – 75°/	inclined	inclined	inclined	inclined	inclined	universal	inclined	inclined	inclined	inclined	inclined	inclined	inclined	inclined	inclined	inclined	universal	inclined	inclined	inclined /15° – 75°/	inclined	universal	horizontal	inclined	inclined	inclined	inclined	inclined	inclined	inclined	inclined	inclined	inclined	inclined	inclined	inclined	inclined	inclined	inclined	inclined	inclined	inclined
Suitable for	DHW	DHW	DHW	heating and DHW	heating and DHW	heating and DHW	pool heating	heating and DHW	DHW	DHW	DHW	DHW	pool heating	heating and DHW	heating and DHW	DHW	heating and DHW	DHW	DHW	heating and DHW	heating and DHW	DHW	DHW	DHW	DHW	DHW	DHW	heating and DHW	DHW	heating and DHW	DHW	DHW	DHW	DHW	DHW	DHW	DHW	DHW	DHW	DHW	DHW	DHW	DHW	DHW	DHW	DHW	DHW	DHW	DHW	DHW
Year-round use																											/-20 ~ +90 °C/
Design
Absorber material				copper	copper	copper								copper	copper	aluminium-copper				copper	copper				copper	copper	copper			copper																			copper	copper
Absorber area		1.89 m²	2.51 m²	0.94 m²	2.31 m²	2.42 m²			3.13 m²	2.09 m²	2.56 m²			2.42 m²	1.87 m²		3.45 m²		1.76 m²						2.79 m²	2.42 m²	2.79 m²		1.92 m²	1.61 m²		1.56 m²	2.09 m²	3.13 m²	1.57 m²	2.09 m²	2.51 m²	3.13 m²	1.57 m²	2.09 m²	2.51 m²	3.13 m²	1.04 m²	1.57 m²	2.09 m²	3.13 m²	1.6 m²	2.41 m²	1.6 m²	2.41 m²
Aperture area	0.94 m²	1.92 m²		0.81 m²	2.33 m²	2.82 m²	2.35 m²	2.1 m²				2.35 m²	4.7 m²	2.82 m²		1.89 m²	3.49 m²	1.86 m²	2.5 m²	0.94 m²	1.86 m²	2.79 m²	1.86 m²	2.34 m²	2.41 m²	1.88 m²	2.41 m²	2 m²		1.88 m²	2.35 m²																1.87 m²	2.81 m²	1.86 m²	2.81 m²
Total collector area		2.07 m²		1.28 m²	2.51 m²	3.84 m²		2.3 m²				2.51 m²		3.84 m²	2 m²	2.16 m²	3.99 m²			1.72 m²	3.34 m²				4.9 m²	4.51 m²	4.9 m²	2.3 m²	2.09 m²	2.6 m²	2.51 m²
Tube type	coaxial vacuum heat pipe		coaxial vacuum direct heating	coaxial vacuum direct heating		coaxial vacuum direct heating	coaxial vacuum direct heating		coaxial vacuum direct heating	coaxial vacuum direct heating	coaxial vacuum direct heating		coaxial vacuum direct heating	coaxial vacuum direct heating		coaxial vacuum direct heating			coaxial vacuum heat pipe	coaxial vacuum heat pipe	coaxial vacuum heat pipe				coaxial vacuum heat pipe	coaxial vacuum heat pipe	coaxial vacuum heat pipe			coaxial vacuum direct heating		coaxial vacuum direct heating	coaxial vacuum direct heating	coaxial vacuum direct heating	coaxial vacuum direct heating	coaxial vacuum direct heating	coaxial vacuum direct heating	coaxial vacuum direct heating	coaxial vacuum heat pipe	coaxial vacuum heat pipe	coaxial vacuum heat pipe	coaxial vacuum heat pipe	coaxial vacuum direct heating	coaxial vacuum direct heating	coaxial vacuum direct heating	coaxial vacuum direct heating	coaxial vacuum heat pipe	coaxial vacuum heat pipe	coaxial vacuum heat pipe	coaxial vacuum heat pipe
Tube size (øxH)	58x1800 mm		58x1800 mm	58x1800 mm		58x1800 mm	58x1800 mm		58x1800 mm	58x1800 mm	58x1800 mm		58x1800 mm	58x1800 mm		58x1800 mm			58x1800 mm	58x1800 mm	58x1800 mm	58x1800 mm	58x1800 mm	58x1800 mm	58x1800 mm	58x1800 mm	58x1800 mm			58x1800 mm		58x1800 mm	58x1800 mm	58x1800 mm	58x1800 mm	58x1800 mm	58x1800 mm	58x1800 mm	58x1800 mm	58x1800 mm	58x1800 mm	58x1800 mm	58x1800 mm	58x1800 mm	58x1800 mm	58x1800 mm	58x1800 mm	58x1800 mm	58x1800 mm	58x1800 mm
Number of tubes	15		24	10		30	25		30	20	24		50	30		12	21	20	20	10	20	30	20	20	30	30	30			20		15	20	30	15	20	24	30	15	20	24	30	10	15	20	30	20	30	20	30
Technical specs
Max. pressure				10 bar	6 bar	10 bar		10 bar				10 bar		10 bar		10 bar	10 bar			6 bar	6 bar				6 bar	10 bar	6 bar	10 bar	6 bar	10 bar	10 bar								6 bar	6 bar	6 bar	6 bar					6 bar	6 bar	6 bar	6 bar
Efficiency	95 %			75.3 %		74.7 %	95 %	76.7 %				79 %	95 %	74.2 %	84.9 %		68.7 %			73.4 %	73.4 %	92 %	92 %		95 %	95 %		80.4 %	76.1 %	75.3 %	79 %																		95 %	95 %
Mirror reflection coef. p								5 %																				5 %
Glass transparency coef. t								95 %				91 %																95 %			91 %
Absorber absorption coef. α		95 %			81.3 %							95 %			95 %	96 %											94 %				95 %																		95 %	95 %
Absorber emissivity coef. ε		5 %										5 %			5 %	4 %											6 %				5 %																		5 %	5 %
Stagnation temperature					145 °C			196 °C				171 °C			208 °C										270 °C	250 °C	270 °C	196 °C			171 °C																		250 °C	250 °C
Heat loss coef. k1					3.849 W/m²*K			3.669 W/m²*K				2.41 W/m²*K			3.778 W/m²*K		0.613 W/m²*K											3.235 W/m²*K			2.41 W/m²*K
Heat loss coef. k2					0.045 W/m²*K			0.018 W/m²*K				0.041 W/m²*K			0.016 W/m²*K		0.003 W/m²*K											0.0117 W/m²*K			0.041 W/m²*K
More specs
In box	1 collector water heater	1 collector	1 collector water heater	1 collector	1 collector	1 collector	1 collector	1 collector	1 collector water heater	1 collector water heater	1 collector water heater	1 collector	1 collector	1 collector	1 collector	1 collector	3 collectors	1 collector water heater	1 collector	1 collector	1 collector	1 collector water heater	1 collector water heater	1 collector water heater	1 collector	1 collector	1 collector	1 collector	1 collector	1 collector	1 collector	1 collector water heater	1 collector water heater	1 collector water heater	1 collector water heater	1 collector water heater	1 collector water heater	1 collector water heater	1 collector water heater	1 collector water heater	1 collector water heater	1 collector water heater	1 collector water heater	1 collector water heater	1 collector water heater	1 collector water heater	1 collector	1 collector	1 collector	1 collector
Expansion vessel	5 L																					5 L	5 L
Water heater capacity	100 L		240 L						250 L	170 L	200 L							200 L				300 L	300 L	200 L								130 L	170 L	250 L	150 L	200 L	240 L	300 L	150 L	200 L	240 L	300 L	100 L	150 L	200 L	300 L
Electric heater			/1500 W/						/2500 W/	/2500 W/	/2500 W/																					/2500 W/	/2500 W/	/2500 W/	/1500 W/	/1500 W/	/1500 W/	/1500 W/	/1500 W/	/1500 W/	/1500 W/	/1500 W/	/1500 W/	/1500 W/	/1500 W/	/1500 W/
Frame material	steel		steel	aluminium		aluminium	aluminium		steel	steel	steel		aluminium	aluminium						aluminium	aluminium	steel	steel	steel	aluminium	aluminium	aluminium		aluminium	aluminium		steel	steel	steel	steel	steel	steel	steel	steel	steel	steel	steel	steel	steel	steel	steel	aluminium	aluminium	aluminium	aluminium
Dimensions (WxHxD)		1041x1988x90 mm		802x1990x188 mm	1056x2380x73 mm	2385x1960x1360 mm		1099x2099x110 mm				1233x2033x80 mm		2390x1990x188 mm	1006x1988x85 mm	1500x2060x155 mm	2433x1641x110 mm		1575x2050x160 mm						2420x2010x145 mm		2420x145x2010 mm	1099x2099x110 mm	1032x2026x67 mm	1635x1960x1360 mm	2033x1233x80 mm
Collector weight	215 kg	37.2 kg		40 kg	39 kg	100 kg	160 kg	36 kg				38 kg	320 kg	108 kg	40 kg	44 kg	62 kg	105 kg	61 kg	40 kg	68 kg	108 kg	78 kg	71 kg	106 kg		106 kg	40 kg	30 kg	68 kg	38 kg																71 kg	105 kg	75 kg	110 kg
Added to E-Catalog	january 2018	july 2017	june 2017	january 2019	january 2019	january 2019	april 2019	august 2020	june 2017	june 2017	june 2017	july 2017	july 2017	july 2017	january 2018	april 2018	january 2019	january 2019	january 2019	april 2019	april 2019	april 2019	april 2019	april 2019	april 2020	june 2020	june 2020	august 2020	january 2018	january 2019	july 2017	june 2017	june 2017	june 2017	june 2017	june 2017	june 2017	june 2017	june 2017	june 2017	june 2017	june 2017	june 2017	june 2017	june 2017	june 2017	july 2017	july 2017	july 2017	july 2017