TEST REPORT. No. AR 13 TEST 089 Rev.3 13/0167. Cat. 0

Transcription

1 LAB N 0951 TEST REORT No. AR 13 TEST 089 Rev.3 13/0167 Cat. 0 Standard EN : 2006 Thermal solar systems and components Solar collectors art 2: Test methods Issued to: Eclipse Italia srl C.so Venezia, Milano Italy Manufacturer Sample/s description: Model/Type reference : Twinsun : Eclipse Italia srl Nozza di Vestone Loc.Merlaro (BS) Italy Test result: ass Annexes: 4 The test results indicated in this paper are exclusively referred to the described sample/s and in the specified conditions of measure. Any other extension of the results to other sample/s or other conditions of measure are to be considered outside to the scope of this document. The partial replication of the present test report is forbidden if it is not authorized in writing by Albarubens S.r.l To check the authenticity of this test report, see website: authentication section. This document supersedes Test report No. AR13TEST089-Rev.2 issued on 2014/01/10 ALBARUBENS Srl Via Gaudenzio Ferrari 21/N Saronno (VA) Italy Issue date: February 13, 2014 Head of the Laboratory Eng. Giuseppe Terzaghi TRF_I rev.04 age 1 of 22

2 Test Report No. : AR 13 TEST 089 Rev.3 Test performed by : Eng. Giuseppe Terzaghi / Fabio Zapparata / Daniel Frascoli Written by : Dr. Marina Cancellier, h.d. Verified by : Eng. Giuseppe Terzaghi Approved by : Eng. Giuseppe Terzaghi Issued date [YYYY/MM/DD] : 2014/02/13 Summary of testing: Tests performed (name of test and test clause): 5.2 Internal pressure tests for absorbers 5.3 High-temperature resistance test 5.4 Exposure test 5.5 External thermal shock test 5.6 Internal thermal shock test 5.7 Rain penetration test 5.9 Mechanical load test 5.10 Impact resistance test 5.11 Final inspection 6.1 Thermal performance testing of liquid heating collectors Testing location: Albarubens srl via Consorziale Saronnino, 70/ Origgio (VA) Italy Copy of marking plate: Not present icture of sample: Figure 1: Front / Rear view of test sample age 2 of 22

3 a) b) c) d) e) Figure 2: Detail view of the module: a) J-box, b) V, c) grounding mark, d) water outlet, e) connections and Do not disconnect underload mark GENERAL INFORMATIONS Abbreviations used in the report: Manufacturer s Specification: MS Mean temperature of heat transfer fluid [ C]: t m Ambient or surrounding air temperature [ C]: T a or t a Global hemispherical solar irradiance [Wm -2 ] G* Reduced temperature difference (= (t m T a )/G*) [m 2 KW -1 ]: T* m Zero-loss collector efficiency (η at T* m = 0), reference to T* m : η 0 Heat loss coefficient [Wm -2 K -1 ]: a 1 Temperature dependence of the heat loss coefficient [Wm- 2 K -2 ]: a 2 Absorber area of collector [m 2 ]: A A Aperture area of collector [m 2 ]: A a Gross area of collector [m 2 ]: A G Specific heat capacity of heat transfer fluid [Jkg -1 K -1 ]: c f Data not provided by the customer Collector incidence angle modifier K θ ossible test case verdicts: - test case does not apply to the test object... : N/A - test object does meet the requirement... : ass () - test object does not meet the requirement... : Fail (F) age 3 of 22

4 Testing: Date of receipt of test item [YYYY/MM/DD]... : 2013/06/21 Date (s) of performance of tests [YYYY/MM/DD]... : Start 2013/06/27 End 2014/02/12 General remarks: This report shall not be reproduced except in full without the written approval of the testing laboratory. The test results presented in this report relate only to the item(s) tested. Any additional text/description/comment, reported in Supplementary information *, refers to opinions and interpretations, not accredited by ACCREDIA. "(see remark #)" refers to a remark appended to the report. "(see Annex #)" refers to an annex appended to the report. "(see appended table)" refers to a table in the Test Report. (*) refers to not accredited by ACCREDIA. Description of test item construction: TECHNICAL SECIFICATIONS REFERRED TO THE THERMAL ART OF THE MODULE IN THE VT SYSTEM ISSUED BY THE ALICANT Sample...: Applicant s name... : License Holder... : Manufacturer... : Trade Mark... : Brand name... : Random sampling from production rototype submitted by client Eclipse Italia srl Eclipse Italia srl Eclipse Italia srl Eclipse Italia Srl Twinsun Ratings Max working temperature [ C]... : Max working pressure [bar]... : Rated (recommended) flow rate [l/m2h]... : Collector Manufacturer... : Model... : CGA Technologies Twinsun evolution one Glazed flat plate Vacuum tube Heat pipe single glass tube Vacuum tube Heat pipe double glass tube Collector type... : Vacuum tube U tube Vacuum tube filled with water Without covering Unglazed Other: Hybrid hotovoltaic Thermal Module (VT) Serial product... : YES / NO Drawing number... : Collector loop flow range [kg/s]... : 0, age 4 of 22

5 Operating pressure [ka]... : 300 Stagnation temperature at 1000 W/m 2 and 30 C ambient temperature [ C]... : Collector mounting... : H -V Support metal frame material (if any)... : Number of collectors... : 85 Any Gross length [mm]... : 1662 Gross width [mm]... : 998 Gross height [mm]... : 45 Gross area [m 2 ]... : 1,66 Aperture area [m 2 ]... : 1,58 Absorber area [m 2 ]... : 1,58 Weight empty [kg]... : 31 Weight without glazing [kg]... : 31 Fluid capacity [l]... : 1 Number of covers... : Cover material... : Cover thickness [mm]... : Cover solar transmittance [%]... : Absorber material... : Absorber s dimensions [mm x mm x mm].. : olietilene + film Aluminium Absorber dry weight [kg]... : 8.5 Absorber Fin width [mm]... : Absorber Fin thickness [mm]... : 2 Solar absorptance α... : Hemispherical emittance ε... : Surface treatment... : Construction type... : Number of risers... : Riser diameter or dimensions [mm]... : Distance between risers [mm]... : Aluminium 1630x966 Back thermal insulation thickness [mm]... : 20 Side thermal insulation thickness [mm]... : Insulation material... : Casing material... : Sealing material... : Other limitations... : Comments on collector design... : olipropilene + film aluminium Aluminium Any age 5 of 22

6 Heat transfer medium... : Water-propylene glycol mixture (% of the mixture: < 30) Alternative acceptable heat transfer fluids. : Test item particulars Accessories and detachable parts included in the evaluation... : Options included... : Components list Any -- Tested with photovoltaic circuit loaded near the maximum power (V-ON) Item Supplier Item code Notes Material Glass Absorber sheet Manifold tubes Absorber tubes Collector insulation Collector back sheet Collector frame Tape sealant Supplementary information *: We certify that Eclipse Italia srl has improved the absorber area of the TWINSUN hybrid system from 1.51 m 2 to m 2 in the meantime of the testing, which corresponds to approximately an increase of 4.3% of the absorbing surface (see Annex # 4). Due to this consideration, the amount of thermal energy will be greater, hence also the performance of the hybrid system increases proportionally. In relazione ai test termici appena conclusi sui moduli ibridi TWINSUN di Eclipse Italia srl, con assorbitore da 1,51 mq di superficie, attestiamo che la stessa Eclipse Italia s.r.l. ha nel frattempo provveduto a migliorare l assorbitore portando le dimensioni dello stesso a circa 1,574 mq di superficie che corrisponde a circa il 4,3% di superficie captante in più (vedi Annex # 4). In conseguenza a quanto sopra anche la quantità di energia termica, quindi la performance del sistema ibrido aumenta in modo proporzionale. age 6 of 22

7 Description of test item construction: BILL OF MATERIALS AND DESIGN ARAMETERS REFERRED TO THE HOTOVOLTAIC ART OF THE MODULE MODULE TYE/S Model designation... : TWINSUN _250 Module dimensions (l x w x h) [mm]... : 1663 x 998 x 45 Module area [m²]... : 1,66 Module weight [Kg]... : 21 SOLAR CELL Cell type technology... : oly Cell manufacturer/model... : Webel Solar Cell manufacturing location... : India Cell dimensions L x W [mm]... : 156 x 156 Cell thickness [µm]... : From 180 to 220 Cell area [cm²]... : 243,36 IDENTIFICATION OF MATERIALS Front cover... : Temperated Glass Front manufacturer/model/thickness... : Interfloat / CONE 4mm Front max temperature [ C]... : Rear cover... : olyester Rear cover manufacturer/model/thickness... : Effegidi 50/190/100 E Rear max temperature [ C]... : Encapsulant type... : EVA Ultra fast cure Encapsulant manufacturer/model... : STRE 15420/UF Frame type/material... : Anodized Alluminium Frame manufacturer... : MM automotive Adhesive for frame... : Double-sided tape Adhesive manufacturer/model... : TESA 4957 Adhesive for junction box... : Silicon Adhesive manufacturer/model... : Dow Corning 744 otting material, if any... : None Internal wiring dimension between cells... : 0,15 x 2 mm Internal wiring dimension between strings... : 0,25 x 7 mm Soldering material... : Sn96,5 Ag3,5(Lead Free) Soldering material manufacturer/model... : Schlenk Metalfolien L-Sn96,5-Ag3,5 Other... : None age 7 of 22

8 IDENTIFICATION OF COMONENTS Junction box type/manufacturer... : Junction box voltage and current rating [V, A]... : Junction box intended for use with conduit?... : Junction box max temperature [ C]... : Cable... : Cable voltage and current rating [V, A]... : Connector... : Connector voltage and current rating [V, A]... : Cables and connectors max temperature [ C]... : Bypass diode type/manufacturer... : Bypass diode rating [A]... : Tyco Electronics 1000V. 13A No 85 C ambient temperature Solar grade 4mmq 1000V Tyco Electronics 1000V Bypass diode max junction temperature [ C]... : 200 C Bypass diode Thermal resistance from junction to leads (RTHJL) [ C/W]... : Bypass diode Thermal resistance from junction to case (RTHJC) [ C/W]... : MODULE DESIGN MINIMUM DISTANCES Minimum distances Between cells... : Minimum distances Between cell and edge of laminate... : Minimum distances Between any current carrying part and edge of laminate... : 85 C ambient temperature AM-Schottky Bypass Diode SL1515 2mm MODULE DESIGN ELECTRICAL CONFIGURATION Total number of cells... : 60 Serial-parallel connection of cells... : 60 Cells per bypass diode... : 20 No. of bypass diodes... : Sample/s identification: Lab. identification codes Serial Number Date when manufactured Supplementary information *: Sample # and # are involved in the V retesting point e of the IECEE Retest Guidelines. age 8 of 22

9 Record of test sequence and summary of main results: EN Thermal solar systems and components Solar collectors art 2: Test methods Clause Requirement + Test Date [YYYY/MM/DD] Start End Results Remarks Verdict 5.2 Internal pressure for absorbers 2013/09/ /09/17 See table High temperature resistance 2013/09/ /09/13 See table Exposure test 2013/06/ /09/17 See table External thermal shock First 2013/09/ /09/17 Second 2014/01/ /01/25 See table Internal thermal shock First 2013/09/ /09/13 Second 2014/01/ /01/26 See table Rain penetration test 2013/09/ /09/17 See table Freeze resistance test Not performed N/A 5.9 Mechanical load test 2013/09/ /09/17 See table Impact resistance test (optional) 2013/09/ /09/17 See table Dismantling final inspection 2013/09/ /09/17 See table Thermal performance testing 2013/06/ /09/ /02/ /02/12 See table Supplementary information *: SECIAL REQUIREMENT FOR ERFORMANCE DETERMINATION OF VT COLLECTORS (Note: Text according to Decision D7.M10) For Solar Keymark certification of VT collectors, the measurements of the thermal performance shall be performed with electrical production under M conditions. In addition, an optional thermal performance determination without electrical production (open circuit for V-Module) is possible. For the electrical load applied for the electrical production an appropriate solution for the M tracking shall be used. SKN Resolution R1.M14 & R5.M15 Solar Keymark Scheme Rules for VT collectors. age 9 of 22

10 5.2 TAB. 1: Internal pressure for inorganic absorbers Sample #...: Test installation...: Maximum allowed working pressure MS [ka]...: Test conditions... : Results Remarks: No failure observed Supplementary information *: none Outdoor Indoor Test ambient temperature [ C] -- Test pressure [ka] 600 Test duration [min] 15 otential failure Absorber leakage Deformation such to establish permanent contact between absorber and cover Breaking or permanent deformation of collector fixing points or collector box Vacuum loss Accumulation of humidity in form of condensate on the inside of the transparent cover of the collector exceeding 10% of the aperture area Other: Failure occurred Verdict age 10 of 22

11 5.3 TAB. 2: High temperature resistance Sample #...: Test installation...: Test conditions... : Collector tilt angle [ ] Outdoor Indoor Solar simulator Average irradiance [W/m 2 ] 978 Average surrounding air temperature [ C] 23.3 Average surrounding air speed [m/s] 0.23 Average absorber temperature [ C] 54.7 Duration of test [min] 60 Calculated collector stagnation temperature [ C] 62.1 Results otential failure Absorber leakage Deformation such to establish permanent contact between absorber and cover Breaking or permanent deformation of collector fixing points or collector box Vacuum loss Accumulation of humidity in form of condensate on the inside of the transparent cover of the collector exceeding 10% of the aperture area Other: Additional information required if an evacuated tubular collector was tested The temperature of the collector was measured at the location shown below: Failure occurred Additional information required if the absorber temperature was measured using a special fluid The collector was partially filled with and the average pressure was a, which corresponds to the average absorber temperature of C. Remarks: The module was mounted on a tracker during the test. Supplementary information *: none N/A Verdict age 11 of 22

12 5.4 TAB. 3: Exposure test Sample #...: Collector tilt [ ]... : Collector azimuth [ ]... : Total days in which H > 14 MJ/m 2... : 30 Total hours with G > 850 W/m 2, air temperature > 10 C... : 30 Supplementary information *: none (Inspection after exposure test) Collector fluid loop N/A The module was mounted on a tracker N/A The module was mounted on a tracker otential problems Evaluation 1 Verdict Swelling of pipes and components N/A N/A Fluid leakages N/A N/A Cracking N/A N/A Warping N/A N/A Corrosion N/A N/A Collector otential problems Evaluation 1 Verdict Cracking/ warping/ corrosion/ rain penetration of the collector box/ fasteners 0 Cracking/ adhesion/ elasticity of the seals/ gaskets 0 Cracking/ crazing/ buckling/ delamination/ warping/ outgassing of the cover/ reflector 0 Cracking/ crazing/ blistering of the absorber coating 0 Deformation/ corrosion/ leakage/ loss of bonding of the absorber tubes and headers 0 Deformation/ corrosion of the absorber mountings 0 Water retention/ outgassing/ degradation of the thermal insulation 0 Mounting structure otential problems Evaluation 1 Verdict Strength/ Safety 0 Safety equipment otential problems Evaluation 1 Verdict Loss of function/ Safety N/A N/A 1 Evaluation scale: 0 No problem 1 Minor problem (requirement apart from testing not fulfilled) 2 Severe problem (requirements for testing not fulfilled) N/A Inspection to established the condition was not possible Supplementary information *: none age 12 of 22

13 5.5 TAB. 4: External thermal shock test Sample #... : Test installation... : Test combined with exposure test... : Test combined with high temperature resistance test... : Test conditions... : Results Outdoor Indoor Shock n : 1 2 Collector tilt angle [ ] Average irradiance [W/m 2 ] Minimum irradiance [W/m 2 ] Average air temperature [ C] Minimum air temperature [ C] reconditioning period [min] Absorber temperature before spraying [ C] Flow rate of water spray [l/min] Temperature of water spray [ C] Duration of water spray [min] 5 5 otential failure Absorber leakage Deformation such to establish permanent contact between absorber and cover Breaking or permanent deformation of collector fixing points or collector box Vacuum loss Accumulation of humidity in form of condensate on the inside of the transparent cover of the collector exceeding 10% of the aperture area Other: Additional information required if an evacuated tubular collector was tested The temperature of the collector was measured at the location shown below: Failure occurred Additional information required if the absorber temperature was measured using a special fluid The collector was partially filled with and the average pressure was a, which corresponds to the average absorber temperature of C. Remarks: No failure detected Supplementary information *: none Verdict age 13 of 22

14 5.6 TAB. 5: Internal thermal shock test Sample #... : Test installation... : Test combined with exposure test... : Test combined with high temperature resistance test... : Test conditions... : Results Outdoor Indoor Shock n : 1 2 Collector tilt angle [ ] Average irradiance [W/m 2 ] Minimum irradiance [W/m 2 ] Average air temperature [ C] Minimum air temperature [ C] reconditioning period [min] Absorber temperature before flowing [ C] Flow rate of heat transfer fluid [l/min] Temperature of heat transfer fluid [ C] Duration of flow [min] 5 5 otential failure Absorber leakage Deformation such to establish permanent contact between absorber and cover Breaking or permanent deformation of collector fixing points or collector box Vacuum loss Accumulation of humidity in form of condensate on the inside of the transparent cover of the collector exceeding 10% of the aperture area Other: Additional information required if an evacuated tubular collector was tested The temperature of the collector was measured at the location shown below: Failure occurred Additional information required if the absorber temperature was measured using a special fluid The collector was partially filled with and the average pressure was a, which corresponds to the average absorber temperature of C. Remarks: No failure detected Supplementary information *: none Verdict age 14 of 22

15 5.7 TAB. 6: Rain penetration test Sample #... : Test installation... : Collector mounted on... : Method used to keep the absorber warm... : Test conditions... : Results Outdoor Indoor Open frame Simulated roof Hot water circulation Exposure of collector to solar irradiation Collector tilt angle [ ] 45 Water flow rate [kg/(s)] 0.06 Temperature of heat transfer fluid [ C] 27 Duration of water spray [h] 4 otential failure Water penetration Absorber leakage Deformation such to establish permanent contact between absorber and cover Breaking or permanent deformation of collector fixing points or collector box Vacuum loss Accumulation of humidity in form of condensate on the inside of the transparent cover of the collector exceeding 10% of the aperture area Other: Remarks: No rain penetration and No failure detected Supplementary information *: none Failure occurred Verdict age 15 of 22

16 5.9 TAB. 8: Mechanical load test Sample #... : Method used to apply positive pressure to the cover... : ositive pressure test of the collector cover Loading with gravel or similar material Loading with water Suction cups ressurisation of collector cover Test conditions... : Maximum pressure load [a] 2400 Supplementary information *: none Negative pressure test of fixings between the cover and the collector box Method used to apply negative pressure to the cover... : Test conditions... : Maximum pressure load [a] Supplementary information *: Not performed Method used to apply negative pressure to the cover... : Suction cups ressurisation of collector box Negative pressure test of collector mountings Loading with gravel or similar material Loading with water Suction cups ressurisation of collector cover Test conditions... : Maximum pressure load [a] 2400 Supplementary information *: none Results Supplementary information *: none otential failure Absorber leakage Deformation such to establish permanent contact between absorber and cover Breaking or permanent deformation of collector fixing points or collector box Vacuum loss Accumulation of humidity in form of condensate on the inside of the transparent cover of the collector exceeding 10% of the aperture area Other: N/A Failure occurred Verdict age 16 of 22

17 5.10 TAB. 9: Impact resistance test (optional) Sample #... : Test installation... : Collector orientation... : Test method used... : Outdoor Indoor Vertical Horizontal Steel ball Ice balls Results otential failure Failure occurred Verdict Absorber leakage Deformation such to establish permanent contact between absorber and cover Breaking or permanent deformation of collector fixing points or collector box Vacuum loss Accumulation of humidity in form of condensate on the inside of the transparent cover of the collector exceeding 10% of the aperture area Other: Supplementary information *: Test parameters from of IEC Ice ball size [mm]: 25 (avg) Ice ball weight [g]: 7.53 (avg) Ice ball velocity [m/s]: 23 (avg) Number of impact locations: 11 Remarks: Impact Locations Shot Location 01 A corner of the module window, not more than 50mm from the frame 02 Edge of the module, not more than 12mm from the frame 03 Over edges of cells, near an electrical joint 04 Over edges of cells, near an electrical joint 05 Over points of minimum spacing between cells 06 Over points of minimum spacing between cells On the module window, not more than 12mm from one of the points at which the module is fixed to the supporting structure On the module window, not more than 12mm from one of the points at which the module is fixed to the supporting structure 09 On the module window, at points farthest from the points selected above 10 On the module window, at points farthest from the points selected above 11 Any points which may prove especially vulnerable to hail impact age 17 of 22

18 5.11 TAB. 10: Final inspection Sample #...: / / / Collector loop pipes otential problems Evaluation 1 Verdict Swelling of pipes and components N/A N/A Fluid leakages N/A N/A Cracking N/A N/A Warping N/A N/A Corrosion N/A N/A Water retention/ outgassing/ degradation of the insulation N/A N/A Collector otential problems/failures Evaluation 1 Verdict Cracking/ warping/ corrosion/ rain penetration of the collector box/ fasteners 0 Cracking/ adhesion/ elasticity of the seals/ gaskets 0 Cracking/ crazing/ buckling/ delamination/ warping/ outgassing of the cover/ reflector 0 Cracking/ crazing/ blistering of the absorber coating 0 Deformation/ corrosion/ leakage/ loss of bonding of the absorber tubes and headers 0 Deformation/ corrosion of the absorber mountings 0 Water retention/ outgassing/ degradation of the thermal insulation 0 Mounting structure otential problems Evaluation 1 Verdict Strength/ Safety 0 Safety equipment otential problems Evaluation 1 Verdict Loss of function/ Safety 0 1 Evaluation scale: 0 No problem 1 Minor problem (requirement apart from testing not fulfilled) 2 Severe problem (requirements for testing not fulfilled) N/A Inspection to established the condition was not possible Supplementary information *: none age 18 of 22

19 6.1 TAB. 11: Thermal performance for glazed solar collectors Sample #... : Test method... : Indoor Mean solar irradiance [W/m 2 ]... : -- Type of the lamps... : -- Shading of longwave radiation... : yes / no Outdoor 6.1 Outdoor Steady state 6.1 Indoor Steady state 6.3 Outdoor Quasi dynamic Latitude/ Longitude... : N / E Collector tilt [ ]... : N/A The module was mounted on a tracker Collector azimuth... : N/A The module was mounted on a tracker Orientation of absorber tubes during testing (horizontal or vertical)... : Vertical T m T a in K ower output per collector unit [W] Irradiance [W/m 2 ] Note: The reported values are for normal incidence. Instantaneous efficiency curve: age 19 of 22

20 Reference area... : Reference area: Aperture area A a Reference area: Absorber area A A Absorber area (used for curve) [m 2 ]... : Aperture area (used for curve) [m 2 ]... : 1.6 Fluid flow rate used for the test [l/min]... : 1.82 Gross collector area [m 2 ]... : -- Supplementary information *: The instantaneous efficiency is defined by: Second order fit to data: Conversion factor µ 0A / µ 0a... : 0.62 (Based on Absorber Area / Aperture Area) Heat transfer coefficient a 1A / a 1a [W/(m 2 K)]... : 25.6 (Based on Absorber Area / Aperture Area) Temp. dependent heat transfer coefficient a 2A / a 2a [W/(m 2 K 2 )]... : Specific eak power [W peak /m 2 ]... : eak power (G = 1000 W/m 2 ) per collector unit [W peak ]... : Incidence Angle Modifier (IAM) at : 0.96 Observed Failures (major failure, defined in of EN : 2006) if any... : none Supplementary information *: (Based on Absorber Area / Aperture Area) For VT module, the IAM shall be determined only for angle of incidence of 50 C. Compared to modules under test, we have verified that Eclipse Italia srl has increased by 4.3% the surface of the absorber now equal to 1,574 square meters (1630 x 966 mm). Therefore we can estimate that the majority recovered energy from the absorber, increases in a proportional way the peak power that passes from W measured to approximate W. Rispetto ai moduli sottoposti a test, abbiamo verificato che Eclipse Italia srl ha aumentato del 4,3 % la superficie dell'assorbitore ora pari a 1,574 mq (1630 x 966 mm). ossiamo stimare quindi che la maggior energia recuperata dall'assorbitore, faccia aumentare in modo proporzionale la potenza di picco che passa dai 620,4 W rilevati, ad approssimativi 647,1 W End of Test Report No. AR 13 TEST 089 Rev age 20 of 22

21 List of Annexes Annex 1: List of measurement equipment Annex 2: Statement of the estimated uncertainty of the test results Annex 3: Model to be included in the test report Annex 4: New absorber drawing area Annex 1: List of measurement equipment Description Identification # Application Astronomic tracker , 5.3, 5.4 Cart for hydraulic test Manometer 20 bar Rain test fixture , 5.7 ortable timer Dynamometer Mechanical load 4.70/ Marking gauge Hail launcher Freezer Digital caliper Small weighing scale Camera Thermal console , 5.3, 5.4, 5.5, 5.6, 5.7, 6.1 Annex 2: Statement of the estimated uncertainty of the test results The measurement uncertainties stated in this document have been determined according to EA-4/02. they were estimated as expanded uncertainty obtained multiplying the standard uncertainty by the coverage factor k corresponding to a confidence level about 95%. Normally, this factor k is 2. Annex 3: The photovoltaic modules with the models Tested type Cell number Cell size [mm] Module size [mm] Cell technology Rated power [W] TWINSUN_ x x 998 oly 250 * Extended VT module type without need of re-testing (according to IECEE Retest Guidelines ): Type * Cell number Cell size [mm] Module size [mm] Cell technology Rated power [W] TWINSUN_XXX x x 998 oly TWINSUN_XXX x x 998 oly TWINSUN_XXX x x 687 oly age 21 of 22

22 Annex 4: New absorber drawing area age 22 of 22