Last updated: 2026-11-04
A solar powered CCTV security system needs a panel sized from the daily load in watt-hours divided by winter peak sun hours and a 0.7 derating factor. For one camera and a 4G router drawing 216 Wh a day at 2 winter sun hours, that is about 154 W of panel and a 108 Ah battery at 12 V.
A site manager has a yard, a gate and no mains within 200 meters, and the quote for trenching a cable is larger than the quote for the cameras. In that situation a buyer starts looking at a solar powered CCTV security system. The idea works, but only when the panel and battery are sized from the worst month of the year and from the night load, not from the camera's headline wattage.
What a solar CCTV system has to power
A solar CCTV system has to power the camera, the recorder or 4G router that moves the video, any heater in cold climates, and the infrared illuminator that runs all night. A solar CCTV security system is a camera installation that takes its energy from a solar panel, a charge controller and a battery instead of from the grid. Every watt the cameras and network gear draw has to be produced by the panel and stored by the battery.
A pan-tilt-zoom unit adds motor current whenever it moves, which is why a PTZ solar security camera needs a larger budget than a fixed one.
Night load decides the size of the system. Infrared lamps, the router and the recorder all run while the panel produces nothing, so the battery must carry the whole night and the panel must refill it the next day. Sizing from the daytime draw alone gives a system that fails first in winter, at 3 a.m., when the footage matters most.
For heavier PTZ cameras, the guide on solar power for high-power PoE PTZ cameras covers typical watts, maximum demand, PoE class and cold operating limits.
Work out the daily load
The daily load is the sum of every device's power in watts multiplied by the hours it runs, giving watt-hours per day. Write down each device twice, once for daylight and once for night. Read the camera's draw from its datasheet with infrared off and on, because the two differ.
The formula is: daily load (Wh) = sum of power (W) x running hours. The table below works one example for a single fixed camera with a 4G router. The inputs are assumptions for the example, not measured values: the camera draws 4 W by day and 8 W at night with infrared on, the router draws 3 W continuously, and day and night are each 12 hours.
| Load | Power | Hours | Energy per day |
|---|---|---|---|
| Camera, daylight | 4 W | 12 h | 48 Wh |
| Camera, night with infrared | 8 W | 12 h | 96 Wh |
| 4G router | 3 W | 24 h | 72 Wh |
| Total | - | - | 216 Wh |
With several cameras the arithmetic is the same, with a recorder added. Take four of the same cameras, a recorder drawing an assumed 10 W around the clock and the same router. The day load is (16 + 10 + 3) W x 12 h = 348 Wh and the night load is (32 + 10 + 3) W x 12 h = 540 Wh, so the system needs 888 Wh a day.
Size the panel and battery
The panel size in watts equals the daily load divided by the peak sun hours of the worst month and by a derating factor that covers wiring, controller and temperature losses. Peak sun hours are the number of hours per day at which the sun would deliver 1 kW per square meter, which is the same as the daily solar energy in kWh per square meter.
The formulas are: panel (W) = daily load (Wh) / (peak sun hours x derating factor), and battery (Ah) = daily load (Wh) x days of autonomy / (usable fraction x system voltage). The worked example below assumes a derating factor of 0.7, 3 days of autonomy, and a usable battery fraction of 0.5 so the battery is not cycled deeply. These are design assumptions for illustration, and the real values depend on the battery chemistry and the site.
Winter is the design case, because a panel that covers the load in midsummer can fall far short in midwinter. The next table sizes the single-camera system from the 216 Wh load for three assumed values of peak sun hours.
| Assumed peak sun hours | Panel for 216 Wh/day | Season it represents |
|---|---|---|
| 2.0 h | 154 W | Dark winter month |
| 3.0 h | 103 W | Shoulder season |
| 5.0 h | 62 W | Clear summer month |
For the battery, 216 Wh x 3 days / 0.5 = 1,296 Wh, and 1,296 Wh / 12 V = 108 Ah. For the four-camera system, 888 Wh needs 888 / (2.0 x 0.7), about 634 W of panel, and 888 x 3 / 0.5 = 5,328 Wh, which is 444 Ah at 12 V or 222 Ah at 24 V. Check the numbers against the actual site data before ordering.
Remote sites with long cloudy spells need more days of autonomy, and the guide on solar power for wildfire monitoring transmission lines shows how that choice shifts the battery bank.
12V, 24V or PoE
A 12 V design suits one or two low-power cameras, while 24 V or PoE suits larger loads and longer cable runs, because a higher voltage carries the same power at lower current. The relation is current (A) = power (W) / voltage (V), and the loss in a cable rises with the square of the current.
| Load | Current at 12 V | Current at 24 V |
|---|---|---|
| 11 W (camera plus router at night) | 0.92 A | 0.46 A |
| 45 W (four cameras, recorder, router at night) | 3.75 A | 1.88 A |
| Cable loss for the same wire | Reference | One quarter |
The table shows that moving from 12 V to 24 V halves the current and cuts the cable loss for the same wire to one quarter. On a run of tens of meters between the battery box and the camera pole, a heavier load can drop enough voltage in the cable to push the camera below its minimum input at night; check the datasheet.
Many network cameras take PoE, which sends power and data on one Ethernet cable and needs an injector or switch at the battery end. The camera datasheet states which PoE standard or fixed voltage it wants, and the supply must match it. The guide on a 24V solar PoE camera and wireless bridge walks through that pairing in detail.
Pole, trailer or wall mounting
The mounting choice is set by where the camera needs to see from and how permanent the site is: a pole carries camera and panel together, a trailer moves the whole system, and a wall suits a sheltered position that faces the sun. Each option fixes how the panel is tilted, how the battery box is protected and which bracket fits.
A pole is the usual answer for a gate or perimeter. The camera sits high, the panel sits just below it facing the equator, and the battery box mounts lower for service access. The pole must resist wind on both panel and camera, so the bracket must clamp the panel firmly at the chosen tilt angle and the pole diameter must be stated before ordering.
A trailer suits temporary sites such as construction, events and car parks, and it lets the panel and mast be set up in a fixed pattern each time. The guide on a solar security camera trailer covers power and mounting for it, and the solar powered surveillance trailer buyer's guide covers panel and battery choices for the towed format.
For mounting hardware, LinkSolar handles OEM and custom bracket work, so panel tilt, pole clamp diameter and rail length can be specified to the project drawing. Send the pole outer diameter and the panel dimensions so the bracket matches. Have the pole and its foundation checked for the site's wind load by a qualified person.
What to send for a quote
A quote for a solar CCTV system needs the camera model's power draw, the number of cameras, the site location, the days of autonomy and the mounting type, because those inputs fix the panel, battery and bracket. LinkSolar is a China-based B2B supplier of custom & OEM solar panels, solar cells and mounting hardware, and specifies each project from these inputs.
Prepare the list below before asking, because missing items cause repeated questions and slow the work.
- List each camera, recorder, router or bridge with its rated power in watts and its supply voltage.
- State the number of cameras and the number of identical sites.
- Give the site location, or the worst-month peak sun hours from a solar data tool for it.
- Name the days of autonomy the site must survive without sun.
- Describe the mounting: pole outer diameter, trailer, or wall, and the tilt.
- Give the order quantity and the target market, since the market sets the labeling and document needs.
Project systems are quoted to the specification, and whether a given system can be supplied is confirmed at quotation.
FAQ
Do solar-powered security cameras actually work?
Solar-powered security cameras work when the panel and battery are sized for the worst month and for the night load. An undersized battery or sizing on summer sun will cause outages whichever camera is used. The sizing steps above give the panel and battery for any camera load.
How big a panel does one CCTV camera need?
A single camera with a 4G router drawing 216 Wh a day needs about 154 W of panel at 2 winter peak sun hours. At 5 peak sun hours the same load needs about 62 W. The result scales directly with the daily load, so measure your own draw first.
Is 12 V or 24 V better for a solar CCTV camera?
A 12 V system is simpler for one low-power camera, and 24 V is better for several cameras or long cable runs. The reason is that 24 V halves the current for the same power and cuts cable loss to a quarter. Always match the voltage to the camera datasheet.
Next step
The sizing above ends in a list of inputs, and the best next move is to fill it in for your site. Prepare the camera power draw, the number of cameras, the quantity and the target market, then Send your requirements on the Solar Security Camera page so the panel, battery and bracket can be specified from them.