How Can Solar Panel Theft Be Prevented | Mounting Security, Monitoring Tracking

Adopting anti-theft bolts and reinforced brackets can lower the risk of being stolen by about 80%; installing GPS tracking and video monitoring to realize real-time positioning; regularly inspecting and establishing asset coding and registration system to elevate management controllability.

Mounting Security

Change anti-theft nails

Normal thickness being 35 millimeters' photovoltaic aluminum alloy frame using standard M8 outer hexagonal bolt fixing time, single piece bolt's conventional disassembly time normally is lower than 12 seconds. Putting 4 corners' standard hardware parts replaced with diameter 8 millimeters' 304 stainless steel plum blossom with column anti-theft screws, is able to make carrying conventional tools personnel's disassembly consumed time increase about 450%.

Installing this type of fastener needs to match the inner diameter being 5 millimeters' dedicated plum blossom screwdriver, applying 18 newton meters to 22 newton meters' torque only then can it be completely locked tight on the ground rail. Market on single piece carrying anti-rust coating's anti-theft bolt procurement unit price fluctuates between 0.45 US dollars and 0.65 US dollars. If adopting one-way anti-retreat nut, when the wrench applied's torque exceeds 15 newton meters, its 12-millimeter wide hexagonal drive head will happen physical fracture.

· Fracture after base will leave behind a height of only 2.5 millimeters' smooth semi-circular top surface.

· Fixture contactable force-bearing area from 113 square millimeters suddenly drops to not enough 10 square millimeters.

· Friction coefficient lower than 0.15's smooth surface makes 10 inches specification's pliers unable to provide exceeding 50 newtons' grabbing force.

· For a set output power of 400 watts' photovoltaic panel, upgrading 4 pieces of anti-disassembly accessories' overall material budget normally will not exceed 2.8 US dollars.

· Single person operating 4 pieces anti-retreat nuts' installation cycle average maintains at 3 minutes to 4 minutes within.

Weld dead bracket

Toward tilt angle at 15 degrees to 30 degrees between the ground photovoltaic array, universally adopting cross-section size being 40 millimeters multiplied by 40 millimeters' 6061-T6 aluminum alloy square tube as main load-bearing guide rail. At a thickness reaching 3.2 millimeters, the metal connector joint place, using an output current of 120 amperes' argon arc welding machine conducting continuous full welding operation, length being 5 centimeters' single strip full weld seam is able to bear as high as 8500 newtons' vertical pulling force. The single piece area being 1.9 square meters, weight about 22 kilograms' solar panel, passing through 4 pieces force-bearing points' metal fusion welding after, its anti-wind load test standard can be elevated to 2400 pascals.

· Destroying a physical connection point needs an operator to carry a rated power of at least 1000 watts' portable angle grinder.

· Equipped with a diameter of 115 millimeters, a thickness of 1.2 millimeters' resin cutting blade, continuous cutting single weld seam's consumed time will exceed 4 minutes.

· Angle grinder at 8500 revolutions/minute's high-speed running under, will produce exceeding 95 decibels' continuous high-frequency noise.

· Metal friction splashing sparks coverage range can reach 2.5 meters to 3 meters.

· High decibel and visual characteristics obvious's operation, at night environment illumination lower than 10 lux's situation under, will make being discovered exposed probability rise 85% above.

· Adding the full welding process will make the early-stage construction cost of a per kilowatt installed capacity rise about 18 US dollars, and the overall construction cycle extend about 15%.

Fill seam block edge

Photovoltaic module backplane and color steel tile roof between's standard installation air gap normally maintains at 10 centimeters to 15 centimeters' interval inside. Using thickness being 2 millimeters, hole diameter being 15 millimeters' galvanized steel wire mesh putting four surroundings side faces' open space completely sealed, can large amplitude lower structure internal modules exposure rate.

The installing size being 2000 millimeters, multiply 150 millimeters' single piece side edge steel mesh sheet, needs using 5 pieces diameter being 6 millimeters' self-tapping screws with 400 millimeters' fixed spacing put it anchored on roof load-bearing purlin. Side edge physical sealing after, thickness exceeding 5 centimeters' operation arm or length exceeding 20 centimeters' mechanical telescopic tool unable to probe into panel back part's junction box region.

· Hole diameter 15 millimeters' mesh structure opening rate maintains at 65% around.

· At wind speed being 3 meters/second's natural ventilation environment under, backplane bottom part's heat dissipation air circulation amount will only reduce 12%.

· Panel at noon 12 o'clock to afternoon 2 o'clock between's working peak temperature average rising amplitude is controlled at 1.5 degrees Celsius within.

· 1.5 degrees Celsius's temperature small amplitude fluctuation toward monocrystalline silicon cell's power generation conversion efficiency influence is not up to 0.3%.

· Covering 100 square meters of roof array's anti-theft mesh material and labor total installation fee is about 240 US dollars.

Smear glue

At installation, pressing the block's inner side and aluminum alloy frame contacting's surface, squeeze out a width of 8 millimeters, and a thickness of 3 millimeters polyurethane structural glue strip. Single module moisture curing type adhesive at an environment temperature of 25 degrees Celsius, relative humidity being 50% condition under, passing through 24 hours' chemical reaction then can reach 70% curing strength level. Completely cured after chemical glue layer anti-shear strength can reach 2.5 megapascals, breaking elongation rate parameter exceeds 400%. At 4 pieces aluminum alloy installation fixtures, place respectively apply length being 40 millimeters' adhesive tape, needs exceeding 450 kilograms' static physical pulling force only then can make glue layer happen peeling fracture.

· Length being 30 centimeters' carbon steel pry bar at force arm magnification rate being 10's condition under, applying 45 kilograms' single point downward pressing gravity unable to destroy chemical bonding structure.

· Every tube capacity being 300 milliliters, the polyurethane structural glue retail unit price is about 8.5 US dollars.

· Single tube 300 milliliters glue is able to satisfy 15 pieces rated power being 350 watts panel's 4 corners bonding smearing need.

· Colloid material at bearing zero below 40 degrees Celsius to 90 degrees Celsius's high low temperature cycle impact under, bonding strength's annual attenuation rate is controlled at 1.5%.

· At the 25-year system design life cycle end period, residual adhesion force parameter still can keep initial factory parameter's 60% above.

Bury flat running wires

Array back face's direct current cable standard cross-sectional area is 4 square millimeters, external wrapping thickness being 1.5 millimeters' cross-linked polyethylene polymer insulation layer. Putting originally natural drooping sag reaching 15 centimeters' cable, using anti-ultraviolet level being UV-5R's black nylon cable tie, with every interval 30 centimeters' fixed spacing tightly stick tied in width being 30 millimeters' aluminum alloy C-type guide rail inner side groove inside. Connecting adjacent two pieces of panels' MC4 waterproof joint standard length is about 90 millimeters, needs to put it pushed into a depth of 45 millimeters' guide rail internal space to conduct hiding.

· At not having reserved exceeding 5 centimeters operation space's situation under, bare hands pulling out male female joints needs to apply exceeding 80 newtons' parallel pulling force.

· Not hidden joint's loose system being tool cut off single root cable's physical consumed time only needs 3 seconds.

· Running wire hiding modification makes cutting off 2 strips positive negative pole loops looking for cutting point's average troubleshooting consumed time increased to 45 seconds.

· According to per megawatt installed capacity, containing about 2500 pieces of modules, standardized cable hiding tying will increase about 60 personal labor hours.

· Per watt's cable bridge frame protection and labor installation cost budget will float up 0.015 US dollars.

Monitoring Tracking

Hang night vision probe

At a distance of solar array edge 15 meters to 20 meters' diagonal position, set up height being 4.5 meters' galvanized steel pipe vertical pole, top part install physical resolution reaching 3,840 multiply 2160's 8 million pixels outdoor level infrared spherical camera. Lens focal length at 2.8 millimeters to 12 millimeters between supports motorized zoom, is able to cover a diagonal field of view angle reaching 120 degrees' horizontal physical space.

When the environment illumination drops to 0.01 lux's deep night environment, equipment built-in's 8 pieces high power 850 nanometers wavelength infrared LED fill light lamps will automatically turn on, projection distance can extend toward outside to 40 meters. Matching a unit nominal power being 150 watts' independent monocrystalline silicon power supply small panel as well as capacity being 12 volts, 50 ampere hours' lithium iron phosphate accumulator cell, video recording equipment at continuously encountering 7 pieces no sunlight's overcast rainy day haze climate under, still is able to maintain average per hour consuming 0.8 amperes current's 24 hours uninterrupted video recording operation.

· Built-in NPU chip possesses 1.2Tops' AI computing power, per second can process frame rate reaching 30 frames' video stream data.

· Humanoid moving detection algorithm in 15 meters radius inside's trigger accuracy rate exceeds 98.5%, animal crossing or tree leaves shaking leading to's false alarm probability is compressed to per month lower than 3 times.

· Screen inside appearing height exceeding 1.2 meters' upright moving object time, alarm signal through built-in's 4G all network pass module transmitting to mobile phone end's time delay is strictly controlled at 1.5 seconds within.

· Procuring a set carrying independent off-grid power supply system's AI anti-destruction camera hardware budget at 220 US dollars to 350 US dollars fluctuates.

· Equipment internal inserting a piece capacity being 256GB, writing speed reaching V30 standard's MicroSD memory card, adopting H.265 video compression coding format, can at bit rate being 2048Kbps' setting under cycle overwrite saving nearly 28 days' local high-definition video recording data.

Hide concealed positioning

Selecting array inside proportion being about 5%'s edge photovoltaic panel modules, at back face's black aluminum alloy frame groove or junction box's gap place, using thickness being 1.2 millimeters' 3M VHB double-sided acrylic foam tape sticking a piece outer shell size being 85 millimeters multiply 45 millimeters multiply 15 millimeters' miniature GPS positioning terminal. The bare machine weight is only 65 grams, the outer shell protection level reaches IP67 standard, and is able to withstand water depth of 1 meter's soaking pressure for 30 minutes without water leaking, completely able to resist outdoor environment annual precipitation reaching 2000 millimeters region's heavy rain washing.

The hardware internal integrated has a piece capacity of 10,000 milliampere hours' non-rechargeable type lithium thionyl chloride cell. Put it configured as every interval 24 hours through LTE Cat-M1 narrow band Internet of Things network toward server sending one time containing longitude, latitude, cell remaining voltage and temperature parameters' data packet, single time communication consumed's electric quantity average is only 0.15 milliampere hours, enough to support as long as 60 months' extremely low power consumption standby life.

· Software background setting a taking installation point as circle center, radius being 50 meters' electronic geographical fence parameter boundary.

· Once the panel happens displacement breaking through the set's 50 meters radius boundary, equipment built-in's gyroscope sensing to continuous lasting time exceeding 5 seconds' 5 hertz frequency vibration, will trigger working mode forcedly switching.

· System tracking frequency will be from every day 1 time jump to every interval 60 seconds, forcing uploading 1 time real-time longitude latitude coordinates.

· Through receiving sky inside L1 frequency band's GPS and GLONASS dual star positioning signal, in an open outdoor environment with no tall buildings shading, horizontal position error median is controlled at 2.5 meters to 4.5 meters interval range.

· Single piece miniature positioning hardware's procurement fee is about 45 US dollars, adding on every year produced's 12 US dollars Internet of Things data card annual fee, allocated to single piece rated power 450 watts' photovoltaic panel on's anti-theft expenditure is about whole board initial procurement cost's 1.8%.

Stick vibration sensing

Finally, reaching 6 meters' galvanized steel C-type load-bearing guide rail, every interval 12 meters' physical spacing using two strips width being 8 millimeters' stainless steel cable ties tighten a piece based on LoRaWAN protocol's wireless vibration sensor. Equipment internal mounted's micro-electro-mechanical system three-axis accelerometer sensitivity is extremely high, is able to capture the amplitude lower limit only being 0.05g (gravity acceleration)'s tiny mechanical deformation and high frequency knocking vibration.

When using a rated power of 800 watts' hand electric drill at a distance sensor 3 meters outside's metal bracket to drill a hole, the drill bit cutting metal produces a 800 hertz to 1200 hertz frequency vibration wave will in 0.2 seconds inside following aluminum alloy frame transmit to sensor internal circuit board. The microprocessor continuously calculates out 5 pieces of vibration samples' variance exceeds the factory set's safe threshold 2.5 times, the radio frequency chip will transmit 14dBm's transmitting power toward the outside broadcast high frequency alarm signal.

· Adopting the 915 megahertz license-free frequency band transmitted's LoRa spread spectrum signal, at vegetation coverage rate lower than 30%'s open plain zone, wireless line-of-sight transmission radius highest can break through 15 kilometers.

· A unit manufacturing cost about 180 US dollars' outdoor type LoRaWAN gateway at most is able to simultaneously carry and concurrently process up to 2000 pieces of bottom layer sensors' uploaded burst traffic load.

· The Node sensor relies on the built-in nominal voltage being 3.6 volts, capacity being 2,400 milliampere hours' ER14505 AA type lithium cell supplying power, static sleep current is smaller than 2 microamperes.

· If, according to average, every year 20 times vibration alarms' frequency is calculated, node module's design maintenance-free life cycle lower limit is as long as 8.5 years.

· At the main control box, configuring a unit's working voltage to be 24 volts' industrial level sound light alarm, receiving sensor signal's 1.5 seconds within, alarm will release sound pressure level as high as 115 decibels' high frequency howling sound, sound propagation coverage range's straight line radius exceeds 300 meters.