What Devices Can a 200W Solar Panel Run | Fans, Small Appliances, Portable Refrigerator

200W panel daily produces about 1 degree electricity.

Through controller connect 100Ah cell, can supply 50W fan operate 15 hours or drive car refrigerator.

Operate need face directly sunlight in order to ensure conversion efficiency.

Fans

AC fan

The USA family indoor most common used's 110V AC floor fan usually equipped with a physical diameter of 16 inches to 20 inches' metal or polymer plastic fan blade. One unit standard's 20-inch AC box type fan at 60 Hz mains power frequency under use 2 gear medium speed operate time's nominal rated power is about 55W. Want to let this 110V AC equipment work on a 12V solar energy DC system, you need a circuit inside series connect one unit at least provide 300W continuous peak output power's pure sine wave inverter.

l Inverter at put 12V DC convert into 110V AC's high frequency step-up process inside will produce 12% to 15% physical heat energy loss.

l Add on this 15% circuit conversion loss after, the original Mark 55W's AC fan actual will from the lithium iron phosphate cell pack inside extract 63.2W's continuous load power.

l Use one 200W panel in 24 hours to collect 640Wh total available electricity quantity divided by 63.2W's actual load data, this unit's 20-inch big fan can operate 10.1 hours.

l Purchase one unit 300W pure sine wave inverter's retail budget falls between 40 US dollars and 70 US dollars up and down.

l Inverter turn on and not plug load time's static standby power consumption is about 0.4A to 0.6A.

Calculate loss

Connect fan and DC power supply's AWG14 specification pure copper cable at every 10 feet's physical extension length will produce about 0.02 ohms' inherent resistance. When 10A's DC current passes through this 10-foot-long metal cable, the two ends will measure out 0.2V's voltage drop, corresponding to 2W's circuit heat energy loss. In order to put voltage drop numerical value strictly control at 3%'s safety tolerance range inside, at 20 feet's wiring distance inside, connect a 50W big power fan must use a cross-section area larger than 3.3 square millimeters' AWG12 thick cable.

l When the outdoor environment temperature rises from 25°C to 40°C, pure copper cable's physical resistivity will increase according to 0.393%/°C's temperature coefficient proportion.

l Temperature rise causes resistance increase, which will make the overall power supply circuit's transmission efficiency drop by 1.5%.

l 12V cigarette lighter plug metal shrapnel connection place's contact resistance is usually around 0.05 ohms.

l If the metal plug surface experiences 3 months' natural weathering and an oxidation layer appears, the contact resistance value will soar to 0.2 ohms and bring extra 4W's useless heat power consumption.

Wind speed and noise

One unit power mark as 18W's DC fan at input 5V voltage under's start operate rotation speed is per minute 800 revolutions, can at direct front 0.5 meters place produce per second 1.5 meters' breeze flow speed. When the input end voltage is PWM solar energy controller stabilized at 14.4V, DC motor's rotation speed will present 1.8 times' linear proportion elevate to per minute 2200 revolutions' maximum peak value. At per minute 2200 revolutions' full load working condition under, 3 pieces of fan blades able to stable output per hour 350 cubic feet's effective air flow volume.

l Per hour, 350 cubic feet's flow volume can put a tent inside a 2 cubic meters closed space's air convection frequency large amplitude elevate 3 times.

l Rotation speed every upward increase 20%, fan blade cuts air, producing mechanical noise decibel number will from base's 35dB sharp climb to 55dB's medium noise level.

l When you put the fan's physical tilt angle upward to 45°degrees, the slant direction of the air flow can put 2.5 meters high ceiling nearby accumulate heat air's replacement rate elevate 40%.

l Every three months, give motor bearings a drop of 2 milliliters' industry lubricating oil, which can lower 0.01's physical friction coefficient.

l Friction coefficient's lower able to put overall electric energy into wind energy's operate efficiency elevate 2.5%.

Can blow how long

The overall internal volume is 10 cubic meters. Closed RV space inside, 1 unit continuous operating power is 20W's fan can turn on's front 15 minutes inside let local body feel surface temperature drop 2°C to 3°C. If at fan air inlet front part 30 centimeters place one 2 kilograms heavy and physical temperature is -5°C's ice block, water evaporates absorb heat effect will put blow out's air flow temperature further forcefully lower 4°C. Equip single block 50Ah capacity's 12V lithium iron phosphate cell able to provide 600Wh's full load absolute energy storage space.

l This 600Wh's full electricity capacity allows you at night time 0 sunshine's 10 hours of sunshine at night, and the whole process turns on 2 power same is 20W's ventilation cooling equipment.

l 2 units 20W equipment at 10 hours' operating cycle inside total consume off 400Wh electricity quantity.

l 400Wh's electricity consume quantity exactly occupies off that block 50Ah cell pack 66.6%'s available discharge depth.

l Second day morning 6 o'clock sun rise after, 200W solar energy panel only needs to use 130W's effective work power continuous shine 3.1 hours.

l 3.1 hours' 130W power input can put this 400Wh's night time electricity quantity gap use 100%'s proportion completely supplement full.

Buy how big size

If your single-day solar energy system total electricity generation budget is 100% fixed at 640Wh, distribute all heat dissipation equipment's electricity quantity proportion at data on suggest strictly maintain at 25% to 30%'s interval. According to 25%, calculate obtain come out's 160Wh single day distribute quota, exactly at power consumption budget on suitable operate 1 unit nominal power is 20W, physical diameter is 12 inches' medium type desk fan. This unit's 20W equipment is used every day, 8 hours' work cycle full load operate, consume off that 160Wh's stipulated electricity quantity, leaving out the remaining 75% 480Wh share give 45W car refrigerator or 15W camp lighting use.

l Market carry with built-in 10,000mAh independent ternary lithium cell's folding fan sell price be uniform fixed at 30 US dollars to 60 US dollars' retail interval.

l Internal charging circuit board supports highest 15W's USB-C fast charge standard current input.

l Through a 200W solar energy panel, back match's 18W standard PD protocol interface, you can at 2.5 hours' time span inside put 10,000mAh's built-in cell from 0% strong charge to 100%.

l Completely break away input cable after, built-in cell can use single time consume 3W power's 1 gear breeze mode continuous operate long reach 12.5 hours.

Small Appliances

Boil coffee machine

One unit standard's 120V AC drip type coffee machine at heating 300 milliliters of water's 3-minute cycle inside, will instant extract high reach 600W's peak power. In order to let this 600W's load at 12V solar energy system inside operate, you must install one unit continuous output power mark as 1,000W, conversion efficiency is 85% pure sine wave inverter. Pass through this 85% inverter efficiency convert calculate after, cell pack end actual bear's physical discharge power will climb to 705.8W. A pot contains 50 grams of coffee powder and 4 cups of liquid. This 3-minute physical operation only consumes about 35.3 Wh's absolute electricity quantity.

At a single block 200W panel, every day provides 640Wh available total budget inside, this 35.3Wh's energy consumption only occupies 5.5% of the quota. The coffee machine single-time brew produce's 90°C high-temperature hot water that can maintain a room temperature of about 25 minutes' best drink temperature. Every 6 months, input 5 US dollars to purchase professional descaling agent to clean the internal stainless steel heating tube, can put overall heating efficiency up 4%.

Camp watch TV

One unit screen diagonal size is 32 inches' LED backlight LCD TV, at 75% brightness and 50% volume setting under standard operating power is 40W. One unit nominal power is 15W's streaming media TV stick use time, the whole entertainment system's physical total load reaches 55W. When you continuous watch time length is 120 minutes' 1080P resolution movie time, this set 55W's system total will extract 110Wh's electric energy from the energy storage cell inside. Put TV screen brightness from 75% to adjust low to 40%, can let equipment's real-time power consumption reading drop 12W.

110Wh's electricity consume quantity equal to consume off 12V 50Ah lithium iron phosphate cell full electricity capacity 600Wh inside's 18.3%. Single block 200W panel at 1,000W/m² sunshine under use per hour 160W's speed charge electricity, only need work 41 minutes then can put this 110Wh's electricity deficit completely fill supplement. This unit weight is only 4.5 kilograms' LCD TV can be placed on a load-bearing ability of 10 kilograms' folding aluminum alloy table surface.

Ceramic slow stew pot

Capacity is 3 quarts' family use ceramic slow stew pot at set as 2 gear low temperature mode time, its internal heating wire's continuous resistance consumes electricity at 120W's level. Want to cook one pot of heavy reach 1.5 kilograms' beef block, equipment need at this 120W's low power status under continuous operation for 4 hours. If you add pot inside, add 300 milliliters temperature is 15°C's cold water, heat to 100°C boiling status will extra increase 22 minutes' full load operating time.

4 hours' physical heating process accumulate consume 480Wh electricity quantity, again superimpose 15% of 110V AC inverter heat energy conversion loss, the final cell end loses' actual energy is 552Wh. 552Wh's huge electricity consumption quantity occupies off 640Wh single day solar energy total electricity generation quantity's 86.2%. Purchase one unit 120W slow stew pot's market price usually fluctuates between 25 US dollars and 40 US dollars. The thickness is 5 millimeters' silicone insulation sleeve wrap pot body outside, able to put overall heat loss rate reduce 12%.

Medical breathing machine

Sufferers with sleep apnea syndrome use CPAP breathing machines, turn off the humidifier and heating pipeline function after, its 12V DC motor's base operate power only is 15W. At night, the long reach 8 hours' standard sleep cycle inside, this unit's 15W's equipment total will consume 120Wh's physical reserve electricity quantity. If you turn on the set temperature is 25°C's humidifier panel, overall energy consumption will instantly soar to 55W, leading to 8 hours' single time total electricity consumption quantity multiply increase to 440Wh.

440Wh's data you must prepare one block, the lowest nominal capacity is 40Ah's 12V lithium iron phosphate cell, can guarantee single night's safety power supply not interrupt. This unit equipment at per minute 15 liters' air flow volume under produce's noise level be controlled at only 26 decibels. Breathing machine internal's H11 level HEPA filter net requires every interval 180 days to conduct one time thorough replacement, single time maintenance material fee is 12 US dollars. At altitude, the environment under 2000 meters' height, the breathing machine's internal motor needs to increase 10% of the operating load to compensate for the thin air density.

Electricity consume quantity compare

In order to put every day 640Wh's solar energy electricity generation quantity conduct 20% to 80% proportion's accurate distribution, we need to compare 7 kinds of common small home appliances at different work cycle under specific electricity quantity consume parameters. Exceed 300W's big power equipment will lead to 12V system cables producing exceed 10% voltage drop, therefore need to increase wire cross-sectional area to 4.0 square millimeters. When the cell pack's remaining electricity quantity percentage drops to 15% low position warning line time, the inverter will at 0.1 seconds inside auto cut off 110V AC output port.

Wiring and cost

Construct one able to accommodate above 800W accumulate instant load's complete off-grid electrical system, need to purchase in unit price is 120 US dollars' 1,000W pure sine wave inverter. Connect inverter and 50Ah lithium iron phosphate cell's 3 feet long AWG4 specification pure copper cable, at bear 80A limit current time will produce about 45°C's surface work temperature. Purchase 2 strips 3 feet long's AWG4 cell connect line's retail fee is 18 US dollars. The installation specification is 50mm x 30mm's wiring terminal time, and applying 15 newton meters' physical torque can ensure contact surface's conductivity reaches 99.8%.

At the circuit positive pole, series connect one rated value is 100A, response time smaller than 0.5 seconds' DC air switch, will for you bring 25 US dollars' extra budget. Every 36 months, replace one time aging's wiring terminal and 15A fuse, its material maintenance cost is strictly compressed at total equipment cost price's 2%. One strip length is 15 feet's 14AWG AC extension line can bear a maximum of 1800W's transmission power, market sell unit price is 14 US dollars.

Portable Refrigerator

The market on one unit physical volume is 45 liters' 12V DC car compressor refrigerator, at empty load status under connect power supply's initial start instant will produce high reach 65W's peak power. When the box body's internal digital temperature sensor detects an air temperature drop to the set's 4°C standard refrigerator value, the compressor's continuous operating power will stabilize at 40W's average value level. At environment temperature is 25°C's sunshade tent inside, this unit 45 liters equipment's physical operate cycle proportion usually maintain at 25% to 30%'s fluctuate interval inside.

According to 28%'s median operating ratio, the refrigerator extracts electric energy from the lithium iron phosphate cell pack inside the actual extract's total sum of 11.2Wh every hour. Pass through continuous 24-hour non-interrupt refrigerate cycle, this equipment accumulates consume's absolute total electricity quantity reach 268.8Wh. 268.8Wh's single day electricity consumption quantity exactly occupies one block 200W solar energy panel every day 640Wh total electricity generation budget's 42.0%. Purchase one unit with pure copper wire coil compressor's 45-liter portable refrigerator needs to expend 280 US dollars to 450 US dollars' equipment procurement fee. Compressor internal fill's 40 grams R134a environment-protect refrigerant able to support long reach 8 years' 8000 times effective start-stop cycle.

At 55°C's extreme high temperature car cabin inside closed loop test, the compressor needs to maintain 85% of the limit operating load rate, leading to a single day overall electricity consumption quantity presenting a 120% surprising growth rate, instant soar to 591Wh's extreme high data peak value.

Drop temperature and temperature difference

Put 5 liters of temperature is 20°C's normal temperature pure water put into the refrigerator, the internal drop temperature, the physical system needs to consume 45W full load power continuous operation 2.5 hours just to reach 5°C's drink standard. 2.5 hours' continuous cold process single-handedly consume off 112.5Wh's electricity quantity, make 200W panel at noon 12 o'clock collect's 2 hours effective electricity generation quantity be 100% offset. When the outside environment temperature and refrigerator internal set's -18°C freeze target between exist exceed 40°C's absolute temperature difference time, equipment's make cold efficiency will present a 0.8's negative correlation coefficient cliff style drop.

At machine body outside wrap one layer thickness is 15 millimeters, density is 30 kg/m³ polyurethane insulation sleeve, can put box body surface's heat conduct rate lower 22%. Heat conduction rate drop 22% brings real economic benefit every day, saving about 59Wh's cell electricity quantity. One unit rated power 50W's double open door 60-liter refrigerator freezer all-in-one machine, its left side 30-liter refrigerator room set at 3°C, its average electricity consumption is 1.8 A. Right side 30 liters freeze room at -15°C working condition under's consume electricity current increase to 2.5A, double cabin same time operate 24 hours' total energy consume standard deviation expand to 15Wh.

Every turn on one time length width size is 40 centimeters x 30 centimeters' refrigerator top cover and stay time exceeds 15 seconds, box inside 30% cold air will instantly conduct convection with outside, cause compressor want extra use 45W full power operate 12 minutes to repair 0.5°C's temperature deviation.

Connect cell use

In order to match a 45-liter refrigerator every day, 268.8Wh's base electric energy consumption quantity, you configure's 12V lithium iron phosphate cell effective remaining capacity must all the time be higher than 30%. One block mark 100Ah's 12.8V cell own 1,280Wh's total capacity, even if at 90% DOD depth discharge standard, it can also provide 1,152Wh's available energy. 1,152Wh's net capacity at not have 200W solar energy panel conduct any supplement electricity's continuous rain day inside, enough to support one unit operate ratio is 28%'s 45 liters compressor refrigerator independent survive 102 hours.

When a 200W panel uses 18V and 8A's work parameter towards this 100Ah cell input current time, the MPPT controller needs 1.8 hours just to put off's 268.8Wh electricity quantity quota use 98%'s charge electricity efficiency completely fill full. The cross-sectional area is 2.5 square millimeters' AWG 14 pure copper DC power supply line at pass through 3.5A's refrigerator start current time, its 2 meters physical length on produce's voltage drop only has 0.08 V.

0.08V's micro small voltage fluctuates completely fall at compressor built-in BMS cell management system set's 10.5V to 11.0V low voltage protect threshold's absolute safety range inside. At -10°C's winter season, the cold camp in, the lithium iron phosphate cell internal electrolyte activity will lower, leading to overall discharge capacity appearing 15%'s statistical probability shrink.

Market price 150 US dollars' carry with Bluetooth monitor module's smart cell pack, every interval 5 seconds will through 2.4GHz frequency towards mobile phone APP send contain voltage, 3.5A current, 78% remaining electricity quantity and also 2 electric cells measured 22°C temperature data's 128 bit encrypt message pack.

Semiconductor cold box

Compared to internal carry mechanical compressor equipment, one unit volume is 24 liters' no compressor semiconductor cold hot box's retail price is large amplitude compress to 40 US dollars to 65 US dollars' low position interval.

Rely on Peltier effect work's semiconductor module not have any physical stop machine cycle, its constant operate power deadly anchor at 48W's fixed numerical value. 48W's equipment continuous conduct electricity work 24 hours will produce high reach 1,152Wh's surprising electricity consumption quantity, completely break through 200W solar energy panel every day 640Wh's maximum electricity generation ability upper limit. Semiconductor cold hot box's maximum make cold limit only can compare outside environment temperature low 18°C to 22°C.

At 35°C's high temperature outdoor environment, the box inside 24 liters space's center lowest temperature can barely maintain at 15°C, exist 100% lead to internal fresh meat ingredient at 4 hours inside bacteria quantity exceed standard's deteriorate probability. Semiconductor heat dissipation fan use per minute 3500 revolutions' high frequency rotation speed continuous exhaust wind, at a distance of 1 meter place collect's noise sample data constant at 55 decibels' noisy interval. Weight only is 3.8 kilograms' plastic box body at use life reach 15000 hours after, semiconductor make cold piece's energy conversion efficiency will happen 30%'s not reversible physical attenuation.

Due to semiconductor equipment 24 hours 1,152Wh's energy consume gap high reach 512Wh, you must put solar energy panel's array total power from single block's 200W expand to 400W, and add extra 180 US dollars budget purchase one block extra's 50Ah cell to balance electricity variance.

Maintain and ventilation

Put the compressor refrigerator in a place at a distance from the car's metal trunk internal wall, only leave a 5-centimeter narrow small space in, will cause the exhaust hole's front part's air convection resistance to sharply increase by 40%.

Ventilation not smooth makes compressor outer shell's physical surface work temperature from normal's 45°C rapid climb to 65°C's high danger status, trigger system energy consumption present positive correlation straight line increase 18%. Every 30 days, use a soft hair brush to clean one area, which is 150 square centimeters. The aluminum make condenser heat dissipation fin's 0.2 millimeters thick dust, can retrieve back 5% of heat exchange efficiency loss. The internal area is 0.15 square meters, and the plastic refrigerator inner bladder surface if attached off thickness exceeds 3 millimeters' condense frost, overall make cold speed rate's decline curve slope will reach 0.15.

Cut off 12V DC power supply, let the condense tube temperature return to 10°C above, conduct the complete melt ice process, only need to spend 35 minutes' physical wait time. Car refrigerator back part 2 metal hooks at bear 20 kilograms' total load weight bump travel time, its physical pull resistance strength's quality parameter be strictly set at 500 newtons above. When vehicle use per hour 80 kilometers' speed pass through drop is 10 centimeters' speed bump time, refrigerator bottom 4 thickness is 8 millimeters' rubber shock absorb pads can put transmit give compressor's physical amplitude large amplitude lower 65%.

Pay 8 US dollars to procure one strip length is 1.8 meters' 16AWG carry with 15A built-in glass tube fuse's DC cigarette lighter power supply line, can effectively put metal plug seam place's heat produce probability from 2.5% to 0.5%.