How Do Monocrystalline Panels Aid Community Projects | Efficiency, Space Use, Output

Mono-crystalline silicon photovoltaic panel efficiency reaches as high as 22%, occupying land little, suitable for community projects.

Every kilowatt can yearly generate electricity about 1,200–1,500 kWh, can be used for school lighting or public facilities.

Through optimizing angle installation and grid-connected energy storage, raise output stability and space utilization rate.

Efficiency

Thoroughly eat light rays

The current market is adopting 182 millimeters or 210 millimeters large size silicon wafer's mono-crystalline photovoltaic panels, its mass production level's cell cell internal photoelectric conversion efficiency has already stabilized at 24.5% to 25.8% interval. Putting mono-crystalline cell cell through high density interconnection craft packaged into standard module after, whole piece panel's external conversion efficiency maintains at 22.5% to 23.2%.

One budget is 150,000 US dollars' community micro power grid if purchasing 500 pieces rated power 580 watts' mono-crystalline panels, at every square meter 1000 watts' standard lighting testing condition under, extremely high conversion efficiency can let the system output 290 degrees pure electric energy every hour. Mono-crystalline silicon material's 1.12 electron volts' forbidden band width exactly matched the solar spectrum's energy most concentrated's visible light waveband, letting photon stimulate out electron-hole pair's probability elevated 18.5%.

· Adopting thickness only is 130 micrometers to 150 micrometers' N-type silicon wafer base, its minority carrier lifespan can be as long as 1000 microseconds to 1500 microseconds, compared to the early period industrial standard's P-type silicon wafer fully high out 3.5 times to 4 times.

· Module outer layer's tempered glass surface covered has one layer thickness accurately at 70 nanometers to 90 nanometers between's silicon nitride anti-reflection coating, forcedly will 380 nanometers to 780 nanometers wavelength range inside's visible light reflectance press low to 1.2% below.

· Combining main busbar quantity reaching 16 strips' ultra many main busbar welding craft, cell front side's silver paste shading area from past's 3.5% large amplitude shrank to 1.1%, internal micro current's transmission distance average shortened 2.6 millimeters.

Withstand big sun

In an environment where the temperature reaches 40 Celsius degrees on a summer day, noon, installed on the community building's roof's mono-crystalline panel backplate, the actual physical temperature usually soars to 65 Celsius degrees to 72 Celsius degrees. The regular module's internal working temperature every rising 1 Celsius degree, output power will just follow it drop. New generation N-type mono-crystalline panel's highest power temperature coefficient is strictly controlled at -0.26%/°C to -0.29%/°C between, compared to old style poly-crystalline panel -0.40%/°C's temperature coefficient had a huge change.

When the actual temperature of a mono-crystalline panel's compared to 25 Celsius degrees' standard testing temperature is high out 45 Celsius degrees, due to high temperature causing power loss rate only is 11.7%, and under poly-crystalline panel will lose 18%. Towards one installed capacity is 250 kilowatts' community roof power station, 6.3% gap in every day high temperature continuously's 4 hours inside, system can additionally snatch back 63 degrees electricity's effective output.

· Solar energy panel's PN junction at high temperature will cause open circuit voltage to produce every Celsius degree about 0.25% to 0.28% cliff style dropping, and short circuit current will only obtain 0.04% insignificant's increasing amplitude, mono-crystalline panel through improving doping craft offset 0.08% voltage dropping amplitude.

· Using possessing -0.28%/C low temperature coefficient's mono-crystalline module to substitute high attenuation module, every year at inverter matching and cable heat dissipating system's additional design budget can fully save 14% to 17% purchasing expense.

· In the yearly average, having 110 days with air temperature exceeding 32 Celsius degrees' arid climate zone, the low temperature coefficient characteristic can let one 100 kilowatt-hour photovoltaic system in the whole July month produce more output of 1450 degrees to 1600 degrees' high value electricity amount.

Shadow can also withstand

The community roof frequently faces ventilation pipes, communication antennas, as well as tree branches and leaves, bringing random blocking. 144 half-piece mono-crystalline module's circuit structure played a very big role. Laser cutting technology will originally complete mono-crystalline cell cell one split into two, causing system internal working current from 13 amperes half chopped to 6.5 amperes.

Internal current dropping half brings very obvious effect, due to resistance heat loss and current's square becomes direct proportion, panel internal's ohmic loss immediately dropped 75%. The whole piece panel is physically divided into 3 pieces, respectively, independent operating series connection sub-blocks. When a certain sub-block is one wipe width, 20 centimeters, the tree leaf shadow covers even 50% of the area, and the panel internally placed's 3 pieces bypass diodes will automatically disconnect the affected block.

· Every piece rated voltage is 42 volts' mono-crystalline module inside contains 144 pieces half-piece batteries, they are by 3 pieces rated current high reaching 20 amperes to 25 amperes' bypass diodes guarded, will local blocking bringing's whole piece module stopping machine risk lowered 66.6%.

· 13 amperes big current cut as 6.5 amperes after, mono-crystalline panel at full load operating time internal's local heating temperature average dropped 1.8 Celsius degrees to 2.4 Celsius degrees, local hot spot effect's occurring probability reduced 68%.

· Matching with voltage withstanding level reaching 1500 volts' new type cable, every strip direct current string maximum can series connection assemble 28 pieces working voltage is 41.5 volts' mono-crystalline module, compared to the past's 1000 volts system, every string more connected 9 pieces panels, cable purchasing amount reduced 31%.

Extremely withstand aging

Photovoltaic panel installed immediately faces long-time lighting impact as well as system high voltage bringing's potential induced reaction, new generation N-type mono-crystalline module at entering operation's initial 1000 hours inside, light-induced degradation numerical value is controlled at 0.4% to 0.8%'s extremely low range, far better than industry average 2.5%'s first year dropping electricity rate. From 2nd year start until 30th year's extremely long operating cycle inside, panel every year's linear power attenuation upper limit will not exceed 0.4%.

Aiming at an 85 Celsius degrees environment temperature matching 85% relative humidity's double extreme testing cabin inside, at continuous applying electricity 192 hours conducting potential induced degradation testing after, panel's overall output power dropping amplitude merely only has 0.85% to 1.1%. One consuming funds 180,000 US dollars built's 200 kilowatts community level system, relying on extremely low's physical attenuation speed, at 30 years life cycle ending time still can maintain 87.4% also is 174.8 kilowatts' strong output capability.

· In total, the time length is 30 years' financial calculating cycle inside, according to the local power grid, every degree of electricity is 0.14 US dollars' unified purchasing price, and the yearly average 0.4%'s ultra low attenuation rate can let the system accumulatively produce high reaching 7.8 million degrees of electricity, create 1,092,000 US dollars' total electricity fee income.

· Will mono-crystalline panel's average investment recovery period from expected's 7.5 years large amplitude shrank to 5.8 years, at recovered all equipment cost after's remaining 24.2 years time inside, system produced's every one degree electricity all has 100% pure profit.

· Adopting containing POE material double-sided micrometer level packaging glue film's mono-crystalline double-sided module, the back side can additionally absorb the environment's diffuse reflection light rays, at reflectance reaching 30% light color cement roof can obtain additional 8% to 12.5% power generation gain.

Space Use

Roof more install panels

Size is 2278 millimeters multiplied by 1134 millimeters' standard large size mono-crystalline photovoltaic panel, single piece physical occupying land area accurately at 2.58 square meters. One piece nominal output 580 watts' module, every square meter area can rigidly squeeze out 224.8 watts' power generation power. In one high-rise apartment and public supporting facility composed of a mixed community inside, the community activity center's flat roof usable net area is usually limited to 400 square meters to 600 square meters.

In the 500 square meters' building top layer space, paving every square meter produces 164 watts of power's old-style polycrystalline silicon panel, full calculation can only arrange a total capacity of 82.4 kilowatts' array. Will equal space all substitute as mono-crystalline equipment, installed total capacity will instantly soar to 112.4 kilowatts. More than 30 kilowatts capacity in daily average effective lighting 4.5 hours' region, every day can out of thin air more manufacture out 135 degrees pure electric energy.

· Mono-crystalline silicon crystal lattice arrangement's consistency lets surface receiving light area's effective utilization rate reach 98.5%, every square centimeter silicon wafer on accommodated's PN junction quantity compared to traditional material more out 14%.

· Area restricted's community project inside every increasing 1 kilowatt's system capacity, equally shared to every watt's inverter purchasing expense, bracket installing manual fee and cable material fee will follow the trend drop 0.03 US dollars to 0.05 US dollars.

· Total installed capacity reaching 100 kilowatts' system if on paving area can save down 120 square meters, freed up's idle space can stuff down one set capacity is 250 kilowatt-hours' container style energy storage cell pack.

Spacing how to leave

The system design stage will set the photovoltaic module's tilting installation angle at 15 degrees to 20 degrees between, used to balance sunshine receiving cross-sectional area and array front rear bringing's shadow length. In the north latitude 35 degrees to 40 degrees' temperate zone region, the winter solstice day noon sun altitude angle drops to the lowest's 26.5 degrees time, height is 0.6 meters' bracket front row will at rear direction project out as long as 1.2 meters' physical shadow zone.

Adopting mono-crystalline half-piece technology's module due to upper lower circuit independent operating, allows planning engineers to plan front and rear row's safety spacing from conservative's 1.5 meters large amplitude compress to 1.1 meters. Arranging data's fine tuning can let the whole community's roof's ground coverage ratio (GCR) from regular's 55% pull high to 68% above.

· Will array spacing shrink 0.4 meters after, every 100 square meters' installing flat surface can hold more stuff in two rows, totaling 12 pieces of mono-crystalline panels, bringing an additional 6.9 kilowatts' absolute increase in amount.

· In a flat roof adopting an east-west direction back-to-back's 10-degree included angle herringbone shape arranging scheme, completely eliminated front-rear row's shadow spacing, can will 500 square meters area's array capacity again towards up push high 22% reaching 137 kilowatts.

· Community building roof edge pre-left's fire channel width must strictly keep at 1.2 meters to 1.5 meters, mono-crystalline panel's high power density guaranteed at deducting occupying land area high reaching 18%'s aisle after still can satisfy original design's power generation indicator.

Calculate clear load-bearing account

One piece 580 watts double-sided double glass mono-crystalline module's net weight is usually 32.5 kilograms up and down, matching thickness 2.0 millimeters' aluminum alloy installing bracket, equally shared to every square meter roof surface's static dead load is about 14.5 kilograms to 16.8 kilograms. Built on an exceeding 15-year-old community public building, its roof's pre-left additional live load remaining amount usually only has every square meter 150 kilograms.

If the surface is unable to punch a hole destroying the waterproof layer's region adopting cement counterweight block ballasting scheme, every square meter's system total weight will suddenly increase to 45 kilograms to 60 kilograms. Mono-crystalline module uses fewer boards, achieving equal total power, from the physical level large amplitude slashed towards aging roof surface's continuous heavy pressure.

· Assembling a 100 kilowatt community power station, choosing to use mono-crystalline panels needs 172 pieces, total weight about 5590 kilograms; choosing to use poly-crystalline panels needs 312 pieces, total weight reaches 8580 kilograms, roof enduring's total static pressure load lightened 34.8%.

· Installing point location's reduction lets penetrating style chemical anchor bolt's using quantity synchronously drop 44%, at occupying land 300 square meters' aging asphalt waterproof roof surface on punching hole quantity from 240 pieces sharply drop to 134 pieces.

· When encountering wind speed reaching every second 35 meters' 12 level hurricane time, wind-facing surface receiving force total area reducing 120 square meters' mono-crystalline array, towards building load-bearing main pillar producing' lateral shear force suddenly drops 2.8 tons.

The back side also works

Module back side's glass light transmittance reaches 98%, matching internal special craft's N-type silicon wafer structure, double side rate indicator can stabilize at 80% to 85% between. When photovoltaic panels are installed at a distance of roof ground height 0.5 meters above the bracket, below's white color waterproof coating or light color gravel surface can provide 25% to 30% albedo.

Mono-crystalline panel back side received ground reflection light after, at noon high illuminance time segment can for every piece rated power 580 watts' panel increase 45 watts to 65 watts' instantaneous power output.

· In one usable length, width each is 20 meters' square shape roof matrix inside, completely not changing installing drawing and physical occupying land boundary, back side power generation gain can let yearly total output from 145,000 degrees electricity rigidly pull high to 162,000 degrees electricity.

· High reflectance white color TPO flexible roof rolling material matching mono-crystalline double-sided panel, every investment of 1 US dollar used for improving roof surface reflection condition, can in as long as 25 years' operating cycle inside exchange back 6.8 US dollars' additional electricity fee income.

· In the winter season, the snow amount reaching 30 centimeters' high latitude community region, the ground surface accumulated snow's albedo high reaches 80%, double-sided mono-crystalline module back side's violent heating can accelerate panel front side ice snow melting, will system due to accumulated snow physical blocking causing's stopping machine days from every year 14 days shrink to 5 days within.

Output

Weak light outputs electricity

Mono-crystalline silicon cell internal's minority carrier lifespan can reach 1500 microseconds, at early morning 6 o'clock or dusk 18 o'clock environment lighting intensity dropping to every square meter 150 watts' extremely low threshold time, module internal's exciton separating speed rate still can maintain at peak value state's 12.5%.

When the sun's altitude angle is situated at 15 degrees to 20 degrees' interval inside, light rays penetrating the atmosphere layer producing refraction and scattering will cause the spectrum inside the blue light waveband proportion large amplitude increase, mono-crystalline panel surface covered with 75 nanometers thickness silicon nitride coating can will wavelength at 400 nanometers to 500 nanometers interval's short wave photon absorption rate lock at 94% above.

Regular poly-crystalline modules in the morning usually need to wait for the environment radiation amount reaching every square meter 250 watts just to activate the system starting voltage, mono-crystalline modules can early will open circuit voltage push rise to 220 volts' inverter lowest starting standard, will every day's effective power generation window period physically prolonged 45 minutes to 60 minutes.

Meteorological monitoring data sample displays, in yearly average, rainy days reaching 140 days' cloudy climate zone, mono-crystalline array relying on early late low illuminance time segment intercepted's weak light ray, can in 25 years' life cycle inside will system's equivalent full load operating time from expected's 1050 hours forcedly pull high to 1180 hours, overall power generation output amount's dispersion degree compared to theoretical calculating value shrank 3.8%.

Stabilize voltage

One machine rated power is 15 kilowatts' community water supplying pressurizing pump at starting instant will produce a high reaching 85 amperes' surge current, causing local micro power grid's voltage at 0.05 seconds inside to produce a high reaching 12% violent fluctuation. The total capacity is 150 kilowatts' mono-crystalline array at noon 12 o'clock to afternoon 14 o'clock's peak time segment, can continuously output exceeding 220 amperes' big current.

Through matching three-phase string style inverter's maximum power point tracking algorithm, the system can use every second 800 times' extremely high frequency real-time scan module's voltage and current curve, will output alternating current's total harmonic distortion rate firmly suppressed at 1.5% 's safety line within.

Continuous 90 days' high load operating record indicates, configuring a mono-crystalline photovoltaic system's community internal power grid, its alternating current output frequency's variance is controlled at 0.02 hertz within, static voltage's standard deviation maintains at 1.8 volts, completely eliminated micro power grid terminal violent fluctuation towards community residents' precise home using appliance producing's irreversible physical damaging probability.

Cloudy day watching rainstorm

In the environment, illuminance only has every square meter 80 watts to 100 watts' continuous rainstorm weather inside, the sky is by thick reaching several thousand meters' cumulonimbus cloud layer completely covered, arriving ground's light ray 90% above all is environment diffuse reflection light. Relying on surface micrometer-level pyramid texturing craft bringing's optical light trapping effect, mono-crystalline silicon wafer is able to will various angles incident's diffuse reflection photon repeatedly refract into crystal lattice internal, large amplitude increased photon and electron colliding's occurring probability.

Situated in a severe natural environment inside, one piece rated nominal output is 580 watts' mono-crystalline panel still can maintain 35 watts to 50 watts' absolute usable power. Will 500 pieces of the same specification panels series connection parallel connection connect into the power grid, even if at light ray most dark's thunderstorm weather inside, the whole system can also maintain 25 kilowatts around's basic power output.

In as long as 12 months' cycle's 1000 pieces independent meteorological data sampling points inside, mono-crystalline system at lighting intensity lower than every square meter 200 watts' time segment inside, accumulatively contributed whole year total power generation amount's 14.5%, its weak light environment under's actual power generation transforming return rate compared to laboratory regression model predicting's average median high out 2.4 percentage points.

Matching big cell

Configuring total capacity is 400 kilowatt-hours' lithium iron phosphate cell pack, needs photovoltaic system at every day's limited lighting window period inside provide big rate's charging current. Mono-crystalline array at weather clear's time segment can output maximum 150 kilowatts' instantaneous charging power, using 0.37C's charging rate at 2.8 hours inside will cell pack's state of charge from 15% rapidly charge energy pull rise to 95%.

When suffering cloud layer blocking causing output power appearing every minute exceeding 15%'s cliff style dropping time, panel terminal configured's smart optimizer will at millisecond level time inside adjust series connection circuit's overall impedance, prevent input cell pack's current happening violent oscillation.

Through statistical variance analysis, adopting high power density mono-crystalline panel for energy storage system charging, can will cell single body's internal temperature difference from regular's 4.5 Celsius degrees shrink to 2.1 Celsius degrees, slowed down cell negative pole material's crystal lattice expanding speed rate, will whole community energy storage cabin's daily average capacity attenuation rate press low to ten thousandth 0.6 below.

Withstand high temperature

In an environment where the air temperature is climbing to 42 Celsius degrees, the wind speed drops to every second 0.5 meters, still, the brutal summer heat environment inside, installed on the roof's mono-crystalline module backplate, physical temperature will approach 75 Celsius degrees' limit peak value. Relying on -0.27%/C's extremely low power temperature coefficient, system actual output power's dropping amplitude is forcedly limited at 13.5% range inside.

Comparing it under it, the temperature coefficient is high, reaching -0.38%/C's old-style polycrystalline equipment at the same high temperature roasting, its output power will suddenly decrease 19%. The total amount is 200 kilowatts' community power station, 5.5% efficiency difference value every day as long as 5 hours' high temperature time segment inside will produce an exceeding 55 degrees electricity net output gap.