Product Name: Prostar 280W Poly Solar Module 280 Wp Factory Directly 60 Cells Polycrystalline PV Solar Module for Home Model NO.: PPS280P-60 Material: Polycrystalline Silicon Certification: ISO, CE Condition: New Application: Industrial Number of Cells: 60PCS Warranty: 25 Years Model No.: PPS280p-60 Maximum Power (Pmax): 280W Maximum Power Voltage (Vmp): 32.3V Module Efficiency Stc: 17.14% Solar Cell: 5bb Junction Box: IP68 Rated Cell Orientation: 60 Cells(6*10) frame: Aluminium Alloy OEM: Acceptable Connector: Mc4 Cable: PV Cable Glass: 3.2mm Trademark: Prostar Transport Package: Standard import Package Specification: 1650x990X40 Origin: China HS Code: 8541402000 Product Description 280W Polycrystalline Solar ModuleProstar multicrystalline silion solar panels (sometimes called polycrystalline solar panels) are made from polycrystalline solar cells, but polycrystalline solar cells are cheaper to make than monocrystalline cells. To make apolycrystalline ingot, you simply melt aload of silicon and then pour the molten liquid into abig box where it solidifies. This is alot simpler than growing amonocrystalline ingot on amulti million dollar crystal growth machine from atiny seed over days or weeks until you have abeautiful shiny cylinder made of asingle crystal of silicon!Prostar multicrystalline silicon solar panel 280 watt made by 60 cells, is particularly suitable for utility scale installations. Thanks to the excellent temperature coefficient, ahigh yield is guaranteed also at high temperatures.Advanced encapsulation material with multi-layered sheet laminations to enhance cell performance and provide along service life. Bypass diodes minimize power drop caused by shade and ensure excellent performance in low-light environments.To convert this wafer into asolar cell, they have to be processed in almost exactly the same way as monocrystalline wafers, i. e. they are cleaned, textured, diffused and anti-reflection coated before the electrical conductors are printed on.The only real differences between amono and polycrystalline solar cell are:1) Polycrystalline solar cells are perfectly square;2) Polycrystalline solar cells have grain boundaries (clearly visible) which slightly reduce the solar efficiency by making it abit harder for the electrons to flow.So does mean multicrystalline silion solar panel 280 watt is inferior to monocrystalline? Not really, because the multicrystalline cells' square shape means that when they are laid up into the panel, there is no wasted space. This makes the efficiency of atypical polycrystalline solar panel almost identical to atypical monocrystalline module these days.Polycrystalline cells were previously thought to be inferior to Monocrystalline because they were slightly less efficient, however, because of the cheaper method by which they can be produced coupled with only slightly lower efficiencies they have become the dominant technology on the residential solar panels market. Product Features &Benefits:1. Higher energy yield:- Outstanding performance at low irradiance- The 60 high-efficiency cells with 5busbar decrease ohmic losses and increase the yield- Maximum energy yield at low NOCt(dirty effect)- Improved energy production through reduced cell series resistance- IP67 junction box available long-term weather endurance2. Increased system reliability:- Enhanced system performance stability with PID resistant technology- Tempered 3.2 mm safety glass for optimal mechanical stability and transparency- Enhanced system reliability in extreme temperature environment with special cell level stress release technology- Great for solar street light or off-grid applications from marine-related to dry camping3. Extra value to customers:- Positive power tolerance up to 5w- EL tested solar modules; no hot-spot heating guaranteed- Stronger 40mm robust frame to hold 5400Pa load- Salt mist, ammonia and blowing sand resistance apply- To seaside, farm and desert environment- 25 years linear performance warrantyTechnical Specifications:Product Name280WPoly Solar PanelBrandProstarModelPPS280P-60Module Efficiency STC(%)17.14%Cell Type5BB Polycrystalline SiliconMaximum System Voltage1000VDCCell Number60 Cells (6*10)Maximum Solar Charge Current15AMaximum Power (Pmax)280WpFront Glass3.2mmMaximum Power Voltage (Vmp)32.3VJunction BoxIP67 RatedMaximum Power Current (Imp)8.69AframeAluminium AlloyOpen-circuit Voltage (Voc)39.4VConnectorMC4Short-circuit Current (Imp)9.20ACablePV CableSize1650x990x40mmWeight17.2Kg