When Do Solar Panels Need Immediate Attention | Output Drop, Physical Damage, System Alerts

Power generation amount sudden drop > 15% need line check; module crack, hot spot temperature difference > 20℃ should stop machine check repair; reverse change device report police or electric pressure unusual need 48 hours inside deal with.

Output Drop

Check electric fee bill

One set forehead fix power for 8kW's live house system at sunshine condition for every day's 5 peak value sun shine hours (PSH)'s ground area, every month's expected power generation amount should be 1,100 degrees to 1200 degrees exactly between float move, allow's count total square difference at ±4% inside. When the bill displays electric net enter electric amount continuous keep 2 count fee cycle periods increase add did 200 degrees (kWh) above, and local ground flat equal retail electric price for 0.16 US dollars/degree time, you every month extra pay out did 32 US dollars' extra outside budget.

You can register record monitor control endpoint download most near 90 days' CSV format original data number, take every 15 minutes one time's gather sample point draw make become contain 3,000 samples' scatter point picture, observe morning 9 o'clock to afternoon 3 o'clock's Gauss divide distribute curve line if happen produce did down cut 20%'s flat top or concave sink. System complete body nature energy ratio (PR value) if from head year test try's 82% down drop to throw use number 3 year's 70% below, measure count out's power generation amount absolute value decline reduce rate already break break did device life life cycle period's 4% normal door threshold value.

· Download most near 36 months' history power generation amount Excel table grid, calculate count contain at least 1000 leave scatter gather sample points middle each every month data number's flat equal number and standard rule difference.

· Line check home family bear load change transform, calculate count out if new increase did power exceed pass 2000W's warm pass empty tone (HVAC) or hold amount big than 60kWh's electric move car car cell charge electric pile bring come did extra outside's energy consume.

· Nuclear pair buy electric agree discussion (PPA) or up net electric price make up stick (FIT) merge together on's 0.08 US dollars/degree return receive price grid, calculate count out single month 300 degrees' electric amount lack mouth bring come's 12 months accumulate count 288 US dollars cash money flow damage lose.

Look reverse change device

Reverse change device display screen or move move end back platform's transform change effect rate parameter if low than 96.5%, straight flow to cross flow's electric energy transform change damage loss exactly will increase add at least 2.5%. At full load run row state form under, one platform 10kW's group string style reverse change device match prepare two roads most big power point follow track (MPPT) pass roads, every road pass road's straight flow enter enter electric pressure should maintain keep at 350V to 450V's most excellent forehead fix work section space.

When the sun's light radiates, the shine degree reaches 800 W/㎡, pass road A's enter electric pressure for 380 V and electric flow for 10 A, pass road B's electric pressure suddenly drops to 250 V and electric flow drops to 6 A, two exactly power output's difference value reaches 2,300 W. Reverse change device wind fan's turn speed at full bear load run row time pass normal for 3000 RPM, outside shell scatter hot piece's surface temperature pass cross red outside measure temperature device measure measure exceed pass did 75℃, inside part hot sensitive resist block will strong system touch send drop forehead run row machine system, take cross flow output power press every minute 100W's speed rate towards down cut subtract, straight arrive temperature drop to 65℃'s return recover value.

· Measure measure reverse change device cross flow output end's thread electric pressure, exact recognize 240V divide phase system's real exact read number stand at 228V to 252V's ±5% wave move fan round inside.

· Examine check straight flow side's pass electric pressure protect protect history record down, exact recognize pass go 180 days' peak value electric pressure not exceed pass reverse change device standard call's 600V most big bear receive up limit.

· Lift take reverse change device inside part SD card middle pass go 48 hours' wrong mistake day record text piece, screen choose out frequency rate higher than every day 5 times' absolute edge block resist lean low (smaller than 50kΩ) report police code code.

Measure temperature

Sun energy cell panel's power temperature tie number mark note for -0.35%/℃, work temperature every high out 25℃'s standard rule test try condition (STC) 1℃, forehead fix output power exactly will press compare ratio button subtract 0.35%. In the summer season, the ring border temperature reach arrive 35℃'s noon after, the deep color roof top on's module back board real exact measure measure temperature often often will whirlwind rise to 65℃ to 70℃ exactly between. Bring enter public style calculate count, (70℃-25℃) × 0.35%/℃ = 15.75%'s decline reduce rate, one piece standard call power for 400W's panel at this time's most high real exact output only left 337W.

Pass cross pair compare module forehead fix cell work temperature (NOCT)'s 45℃ parameter, N shape TOPCon cell's temperature tie number excellent transform arrive did -0.29%/℃, mutual compare at pass down's P shape PERC cell can at 60℃'s high temperature ring border under pull back about 2.4%'s electric amount damage lose. Use use divide distinguish rate for 320×240 picture plain's hot become picture no person machine at distance leave roof top 10 meters' vertical straight high degree enter row sweep draw, panel on exist stand temperature compare round round area domain high out 15℃ above's unusual many edge shape color block, measure count inside part cell piece already happen produce did 50 ohms above's not can reverse hot spot resist block.

· Record down afternoon 1 o'clock to 2 o'clock exactly between back board temperature's most high peak value, calculate count its with exactly day ring border most high temperature exactly between 30℃'s firm fix temperature difference occupy compare.

· Measure the roof top bottom part's pass wind gap gap thick degree, low than 10 centimeters' install setup high degree will make empty gas pair flow scatter hot effect rate down drop 40% above.

· Calculate count every day because temperature rise high leads to 6 hours output low valley period inside, system total power generation amount's subtract little rate stand at 12% to 18%'s normal rule divide distribute section space.

Calculate count decline reduce rate

Out factory mark sign on's thread nature quality protect bear promise head year light lead decline reduce (LID) bring come's power down drop not will exceed pass 2.0%, follow after 24 years inside's year chemical decline reduce rate should control at 0.55% inside. Run row to number 10 month time, single piece 410W module's output at least need need maintain keep at 401.8W above; arrived did number 12 year, system's complete body forehead fix power generation ability not should be lower than standard call hold amount's 91.4%.

At device throw use's front 6 months inside, system complete body transform change effect rate down drop did 5% above, extreme big rate rate is electric power lead induce decline reduce (PID) effect answer lead cause did 5 milli amperes (mA)'s leak electric flow from glass panel towards connect ground's aluminum make edge frame turn move. You can benefit from using night space enter row PID fix recover test try, towards module give add 1000V's reverse towards straight flow lean press continuous keep 8 hours, observe number two day noon time's peak value power recover did 3% to 4%'s tool body number value. Lift take pass go 60 months' month degree middle position number power generation data number, move use thread nature return return model shape (Y = aX + b) fit match out real exact's decline reduce slant rate, slant rate absolute value big than 0.8%/year, exactly match match did module make build business supply give free extra change change 300 US dollars match pieces' protect repair standard rule.

· Examine check panel make build business supply give's number three square test try room test try report tell, nuclear pair PID resist nature test try middle lean set electric pressure for -1500V, time long 96 hours after power down drop small than 5%.

· Pair compare same street area inside install setup time mutual difference not exceed pass 3 months' another one set same rule grid 5kW system, calculate count two exactly's day flat equal power generation amount square difference number value if big than 15%.

· Safe row every cross 24 months enter row one time I-V curve line sweep draw, test try short circuit electric flow (Isc) and open circuit electric pressure (Voc) mutual compare at out factory data number table happen produce did how big percent compare's deviate difference.

Find cover block object

Group string style system frame build under, single strip branch road on string connect did 12 pieces panel, its middle 1 piece panel surface have area area occupy compare not arrive 5%'s physical cover block object, complete string 12 pieces panel's work electric flow all will be limited fixed at by cover block cell piece what can allow's most low ampere number value inside. One piece long 10 centimeters, wide 5 centimeters, tree leaf fall down square's silicon piece on, that one string's total output electric flow from 9.5A sharp subtract to 3.2A, complete whole MPPT pass road's blink time power down drop did 66%.

Micro shape reverse change device (Microinverter) or power excellent transform device (Optimizer) match set can take every piece panel transform change become stand-alone run row's power generation single original, pass cross straight flow side most high 60V's rise drop press tone section, take single point cover block bring come's 15% system level shadow sound round limit at 3%'s single piece model block damage lose inside. Stand at roof top position, use use sun track mark follow follow device (Solar Pathfinder) divide analysis complete year 12 months inside early morning 8 o'clock and afternoon 4 o'clock's sun high degree angle, measure measure high degree exceed pass 5 meters' tree wood or near near build construct object throw shoot did long degree exceed pass 2 meters' shadow shadow band.

· Clear remove panel surface thick degree reach arrive 1 millimeter above's grain grain object accumulate ash, return recover surface light volt glass 95% above's original begin penetrate light rate.

· Fix cut distance leave light volt array row south side edge frame water flat distance leave not full 3 meters and high degree exceed standard's tree hat, increase add every day at least 1.5 hours' without cover block sun shine time long.

· Calculate count follow at part part bird shit cover block make become's area area occupy empty compare, every increase add 1%'s dirty dirt cover cover rate, bring come about 2.5%'s power generation amount decline reduce.

Line check two pole tube

The present generation standard rule's light volt module connect thread box inside gather became 3 pieces side connect's side road two pole tube, take inside part's 108 pieces half piece cell divide cut become 3 pieces stand alone's 36 pieces string connect child string. Ten thousand use table at straight flow 200V gear position under measure get single piece module's open circuit electric pressure (Voc) from standard call's 37.5V down drop arrived did 25.0V left right, fine exact lack lose did 12.5V's electric pressure difference, hundred divide of hundred exact recognize its middle one piece side road two pole tube already stand at forever long lead pass or by hit break short circuit's 0 ohms state form. Hard piece damage bad lead cause this panel stand exactly lose lose did 33.3%'s forehead fix power, at 10A's forehead fix electric flow under, single piece panel rely empty steam send did about 125W's power generation ability.

Two pole tube lose effect pass normal is suffer receive did thunder hit make become's blink time 3000 volts (V)'s wave jump electric pressure invade enter, or exactly is long period bear receive did exceed pass 15A's positive towards reverse towards cross change electric flow bump hit. Break open MC4 connect join device, take ten thousand use table cut change to two pole tube test try gear, positive towards measure measure normal normal read number at 0.4V to 0.6V exactly between, display for 0.00V or bee sound device continuous keep ring bell exceed pass 3 seconds, must at 48 hours inside change change forehead fix bear press value at 1000V above's same shape number Xiao Te Ji two pole tube.

· Record every piece group string connect enter reverse change device front's total electric pressure, exact prove 20 pieces panel string connect's total electric pressure strict limit equal to 750V add up or subtract go 3%'s mistake difference fan round.

· Tear open panel back part's PPO material quality connect thread box outside shell, examine check 3 pieces two pole tube surface's ring oxygen tree fat pour seal glue exist stand straight path big than 2 milli meters' burn burn black point number amount.

· Calculate change change single piece connect thread box's total become base, mutual add about 5 US dollars' match pieces price grid and long reach 1.5 hours' high empty make work person work time fee use.

Physical Damage

Look glass break crack

Light volt module most outside layer pass normal cover cover follow thick degree for 3.2 milli meters' low iron high penetrate steel chemical glass, can enough bear receive straight path 25 milli meters' ice hail by every second 23 meters' speed rate vertical straight bump hit. When suffering extreme point sky weather, compare like straight path reach arrive 50 milli meters' ice hail by 80 kilo meters/hour's end point speed rate smash hit panel time, blink time move energy will exceed pass glass's 5400 Pascals (Pa) machine tool carry load extreme limit, at surface leave down straight path big than 3 centimeters' spider net shape break crack area.

Light thread penetrate pass break crack glass time's fold shoot rate will happen produce strict heavy lean leave, lead cause this area's light thread penetrate shoot rate from original begin's 95% sharp subtract to 50% below. Single piece area area for 2.2 square meters, forehead fix power for 400 watts' single crystal silicon panel, one dawn out present cover cover area area exceed pass 15%'s strict heavy break crack, its short circuit electric flow (Isc) will stand exactly down drop 2 to 3 amperes (A), force make complete body output power at 5 minutes inside fall break 250 watts (W). Micro break crack lines (Micro-cracks) although meat eye hard to examine feel, wide degree often often small than 50 micro meters, but will cut break cell piece surface's silver thick liquid main grid line. Use electric arrive send light (EL) test try device at night space give add 8 amperes' positive towards lean set electric flow, can enough clear exact ground shoot catch arrive because break grid lead cause's black color not send light area domain. Hide crack at experience pass did day night temperature difference bring 300 times hot expand cold shrink cycle period after, will at 12 to 18 months inside play transform become pass cross nature physical break crack, make single piece panel's year chemical power decline reduce rate from 0.55% emergency violent climb rise to 10% above.

Break damage's glass panel will stand exactly lose lose IP68 level grid's prevent dust prevent water nature ability. When every hour, the rain amount exceeds 10 millimeters, water divides at 30 minutes inside, and crosses 0.1 millimeters wide's glass break crack seep penetrate enter inside part's B alkene - vinegar sour B alkene ester (EVA) seal package glue layer, lead send not can reverse's metal touch point electric chemical rot eat.

Line check branch stand change shape

Install setup on the roof's 6063-T5 aluminum match metal branch stand system and not rust steel clip tool must time moment bear receive move state's extreme value wind press and quiet state's accumulate snow carry load. At the meeting, the wind speed reaches every hour 130 English miles (about 209 kilometers/hour)'s array wind time, lean slant angle degree for 30 degrees' panel array row back face will happen produce exceed pass 2400 Pascals' up rise empty gas move force learn up rise force.

If install setup person worker at apply work time no have use use twist distance pull hand take T shape screw bolt twist tight to standard rule's 15 newtons·meters (N·m), or exactly at experience pass did 5 years' high frequency rate micro small shake move after, screw bolt's tight firm twist distance self nature decline back to 5 N·m below, panel edge frame's positive pole oxygen chemical aluminum edge frame exactly will happen produce exceed pass 5 milli meters' physical take out position move. This kind of micro small's loose move at long reach 72 hours' continuous keep big wind blow hit under, will play transform become frequency rate for 50 Hertz (Hz)'s violent violent machine tool mutual shake.

Every piece heavy amount reaches 22 kilo grams' light volt panel at mutual shake make use of under, will towards bottom part's install setup lead rail happen produce high reach 500 newtons (N)'s cross change cut cut force, most end lead cause thick degree for 2 milli meters' aluminum match metal main lead rail happen produce not can reverse's bend submit change shape. When you stand on the roof top and use a water flat device to measure time, if you send out two pieces of panel's edge frame high degree difference exceed pass did 1.5 centimeters, speak clear down square's L shape branch hold foot or roof top prevent seep leak bottom seat already out present did complete bottom's knot build nature break crack.

Lead rail change shape will make two pieces panel exactly between standard rule 20 milli meters gap gap by violent violent push press to 0 milli meters, lead cause panel edge frame happen produce hard nature bump hit. When the ring border temperature from early morning's 10℃ rises to noon after's 40℃ time, hot expand swell tie number for 23 × 10^-6/℃'s aluminum material will happen produce physical stretch long, mutual each push press happen produce's answer force high reach several hundred mega Pascals (MPa), will at blink time press break complete row module's bear heavy frame build.

Measure measure absolute edge leak electric

Complete whole's sun energy array row towards ground's absolute edge resist block at mutual pair wet degree 40%'s dry dry ring border under pass normal will be bigger than 50 mega ohms (MΩ). Panel back board (Backsheet) by sharp sharp's fall drop tree branch scratch out long degree exceed pass 5 centimeters, deep degree pierce pass 0.3 millimeters contain fluorine gather match object absolute edge layer's wound mark after, inside part take electric's plate tin copper thin thin metal sheet weld band exactly will straight connect expose bare at empty gas middle. At mutual pair wet degree reach arrive 85%'s clear morning, or exactly is surface attach catch did thick degree 0.5 milli meters' dew water knot dew state form under, this road physical scratch mark will change become one strip lead electric rate extreme high's water nature pass road.

Use 1000V straight flow gear position's mega ohm table measure measure this group string's positive pole towards ground absolute edge resist value, read number will at 10 seconds inside from normal normal's 50 MΩ violent drop to small than 0.5 MΩ's safe full red line below. This time, a straight flow system with connect ground's roof top metal knot build exactly between will happen produce high reach 600 volts (V) above's huge big electric position difference. High reach 30 milliamperes (mA)'s leak electric flow will follow rain water and metal branch stand four places flow run away, not only will let reverse change device at 0.2 seconds inside touch send GFDI (connect ground mistake barrier examine measure break circuit device) protect protect move make and strong system cut break cross flow output, return will let any no prevent protect touch catch arrive wet damp roof top's person face point heart room shake move's lead life touch electric danger dangerous.

Fix this kind of deep layer physical break bad lead cause's leak electric, must at break open all straight flow separate leave protect protect open shut's 2 hours inside enter row. Strict limit forbid use absolute edge glue band enter row simple single's outside part wrap round fix make up, must spend fee about 250 to 400 US dollars to buy one piece complete new same parameter panel, and branch pay every hour 150 US dollars' person work fee Please hold have NABCEP recognize exact's special exact skill master enter row 1 pair 1's complete board replace change.

Prevent inside part hot spot

Physical bump hit lead cause single piece 182 milli meters × 182 milli meters' single crystal silicon cell piece break crack after, lose go light electric transform change ability's crystal silicon break piece area domain will at string connect electric road middle turn change become one piece high resist value's pure consume electric resist block body. At standard rule light shine condition under, complete strip branch road on high reach 10 amperes (A)'s straight flow work electric flow by force strong row push pass this resist value possible high reach 20 ohms (Ω)'s break damage point. Root according Jiao Er hot calculate count public style (P = I²R), this area area not arrive 5 square centimeters' physical break damage area domain will blink time happen produce high reach 200 watts (W)'s gather middle hot power. This stream huge big's hot energy no method pass cross thick degree only for 30 micro meters' back board enter row normal rule's self nature pair flow scatter send, lead cause this point position's part part temperature by every minute 15℃'s extreme high climb rise speed rate towards up whirlwind rise.

Use red outside divide distinguish rate for 640×512 picture plain, hot sensitive clever degree small than 50 milli Kai Er Wen (mK)'s business use no person machine hot become picture device from 15 meters up empty bow look sweep draw, will clear exact ground catch catch arrive suffer damage panel on out present one piece absolute temperature read number high reach 150℃ to 160℃, with round edge area domain form become 80℃ above violent violent temperature difference's high temperature high bright unusual color spot.

System Alerts

Turn code code

If the reverse change device panel's LED point display light from often bright green color to change for every second flash blink 3 times' red color letter mark, LCD liquid crystal screen curtain on brush new out "Error 43"'s ten six enter system warn tell code code, device inside part's physical continuous electric device already strong row cut break did straight flow to cross flow's transform change return road.

Light volt system standard match did straight flow electric arc mistake barrier break road device (AFCI) model block. When Huo Er electric flow pass feel device at straight flow thread road middle spy measure arrive frequency rate step at 10kHz to 100kHz exactly between's electric arc special exact frequency table time, micro deal with device will at 200 milliseconds (ms)'s move count cycle period inside strong system break open total bear load output. This move can have an effect to prevent the temperature from climbing to 3000℃'s high pressure electric arc lead burn round edge thick degree for 0.5 milli meters' gather chlorine B alkene (PVC) absolute edge outside skin.

You can press down the device outside the shell's bottom part's physical turn page key, tone take pass go 72 hours protect save at flash save inside's history day record. Borrow suppose code code "E031" represents table's hard piece level mistake barrier continuous keep 3 days at early morning 6 o'clock 30 minutes exact time touch send, every time partner follow long reach 15 minutes' dead machine with heavy start cycle period, inside part absolute edge grid double pole shape crystal body tube (IGBT) happen produce not can reverse hot hit pass's rate rate already reach arrive 90%. Towards supply answer business order buy one piece match match 10kW reverse change device's complete new main control electric road board, hard piece object material become base about for 850 US dollars, outside add up door hold certificate electric worker every hour 120 US dollars' 2 hours standard rule work time fee.

Measure cross flow electric pressure

Light volt merge net reverse change device must strictly limit follow IEEE 1547 divide distribute style electric source mutual connect agree discussion, take every second clock not lower than 50 times' frequency rate gather collect electric net cross flow electric's wave shape parameter, exact prove its if maintain keep at match rule's number learn section space inside.

At North America standard rule's 240V divide phase (Split-phase) live house electric gas frame build middle, reverse change device's cross flow run row electric pressure window mouth by hard piece firm chemical at 211V to 264V's fan round. When the public total change press device because round edge street area bear load exceed carry, lead cause feed enter room house electric table's electric pressure at noon 12 o'clock violent drop to 205V and continuous keep 2.5 seconds, reverse change device will stand exactly at root local send save device middle write enter one strip "AC Under-Voltage" matter piece, pull open cross flow side's electric magnet touch catch device.

Frequency rate wave move same kind stand at microsecond level's strict dense monitor control of under. Standard rule's 60Hz cross-flow electric wave shape only want to happen produce micro small lean move, drop to 59.3Hz or climb rise break break 60.5Hz, prevent alone island (Anti-islanding) protect protect core piece exactly will at 0.16 seconds' time window mouth inside hold row take off net point order, stop stop towards outside part lose send electric energy. Take number word ten thousand use table dial to cross flow 750V gear position, measure measure main match electric box inside double pole break road device L1 to L2's thread electric pressure. If you read the number exactly long period live high not drop stop stay at 255V on, should arrive electric public total matter business electric power enterprise, ask ask pair square at 5 pieces work day inside tone send apply work car front go street corner change press device place tone whole divide connect head (Tap changer)'s physical gear position, take base foundation feed electric electric pressure towards down press drop about 5%.

Report connect ground mistake barrier

Only want rain water to follow follow micro small's gap gap seep enter MC4 connect thread's end child inside part, or exactly local ground's bite tooth class move object bite pass straight path for 6 milli meters (6mm²) straight flow main electric cable absolute edge layer, reverse change device early morning call wake step section's absolute edge resist block self examine (Iso Fault) order sequence must fix will block cut complete set system's merge net move make.

Sun rise up time, reverse change device will towards complete whole roof top's straight flow array row pour enter 500V's low frequency rate pulse rush test try electric pressure, calculate count straight flow total thread positive negative two poles towards ground face's absolute edge resist block number value. If the meeting arrives continuous keep drop rain, lead cause empty gas mutual pair wet degree reach arrive 85% above, system catch catch arrive's total connect ground resist block value low than 600 thousand ohms (kΩ)'s law rule allow down limit, display panel will bright up "Ground Fault"'s red color LED warn show light, and partner follow frequency rate for 80 divide shells (dB)'s bee sound device array row ring sound.

At reverse change device full bear load turn move's white sky, leave surplus electric flow monitor measure single original (RCMU) will by every second 1000 times' high frequency rate gather sample rate divide analysis cross straight flow return road middle's leak electric flow change amount. One dawn spy measure arrived, having exceeded 30 milliamperes (mA) leak electric flow follow follow aluminum make lead rail flow towards home family's main connect ground row, device will judge fix exist stand person worker touch electric wind danger and blink time stop machine.

Fix position hide hide at huge big array row middle's absolute edge break damage point extreme its many annoy, two names high level skill art person workers often often need need carry bring 1000V mega ohm table at lean slant angle for 20 degrees' roof top on continuous keep work 4 pieces hours, take 30 pieces light volt panel tear solve become every 5 pieces one group's physical single original enter row point step blind measure. Single time deep degree's leak electric line check serve matter will consume exhaust drop about 550 to 650 US dollars' cash money budget.

No have net

Back platform monitor control data number's middle break pass deliver although not will at physical electric road on cut break reverse change device's 10 thousand watts (kW) power output, but will let you lose lose towards price value 15000 US dollars send electric device turn move state form's far road dry pre-in right.

Big part divide reverse change device inside set's Wi-Fi data number record down device only together hold 2.4GHz frequency section's without thread electric wave. When the road left device penetrates the wall after reaching the arrive pass message model block's RSSI (receive receive letter mark strong degree point display) number value declines to -75 dBm below time, device every cross 5 minutes towards cloud end Amazon AWS serve machine sends one time's 10KB add secret data number bag exactly will happen exceed pass 40%'s pass message throw bag rate.

Examine read hand machine end monitor control APP, state form column continuous keep 48 hours stop stay at "Device leave thread (Offline)"'s ash color picture mark time, need need go car storehouse examine look reverse change device outside shell on's WLAN blue color point display light if already out off. Device inside part stick piece weld connect's SD save save middle medium most many only branch hold hold accept 30 days' root local take off machine run row day record.

Exceed our 30-day border limit's point time power generation amount curve line, MPPT electric pressure extreme value and also electric net frequency rate wave move history, will be by system back platform press light first enter first out (FIFO)'s data number rule grid enter row forever long nature cover write. Spend 150 US dollars to buy one piece of fit match original factory agreed discussion's 4G LTE bee nest net network data number stick, match match every month capital fee 5 US dollars' low flow amount object connect net (IoT) SIM card, can take break net make become's quality protect reason make up take exact fail defeat rate rate press low to 2% inside.