Power Your Jobsite Camera with Solar — No Grid Required

What size solar panel do you actually need to keep a construction site camera running 24/7 — when there's no grid power, no permanent structures, and the camera has to move as the build progresses?

It's a common problem. Construction sites need security cameras from day one — before electrical rough-in, before the temporary power pole is up, sometimes before the foundation is even poured. Theft, liability documentation, progress time-lapses, OSHA compliance footage — the use cases stack up fast. But the power situation during early construction is basically "there is none."

That's where solar comes in. Here's how to spec it right so your camera doesn't die at 2 AM when someone's loading your copper wire into a pickup truck.

Step 1: Figure Out Your Camera's Actual Power Draw

This is where most people get it wrong. They search for "solar panel for security camera" and buy whatever's suggested. But construction site cameras aren't your Ring doorbell.

Most jobsite cameras are 4G cellular models — they have to be, because there's no WiFi on a dirt lot. And 4G radios eat power.

Here's the real consumption range:

Popular construction cameras like the Reolink Go Plus, Arlo Go 2, and dedicated jobsite cams (Sensera, OxBlue) fall somewhere in that 8–15 Wh/day range when recording motion-triggered clips and uploading over LTE.

The key variable: how often is the camera transmitting? A camera that snaps a few photos per hour uses a fraction of what a camera streaming live video all day consumes. Check your camera's spec sheet for standby current and active current, then estimate based on how many triggers per day you expect. Construction sites have a lot of motion during work hours — trucks, crews, equipment — so budget for the higher end.

Step 2: Size Your Solar Panel

The rule of thumb for off-grid solar: your panel should produce 2–3× your daily consumption to account for weather, angle losses, dust, and charging inefficiency.

For a single 4G camera drawing 8–15 Wh/day:

• Minimum panel: 8W. On a decent day (4–5 peak sun hours), an 8W panel generates about 32–40 Wh. After system losses (charge controller efficiency, battery charge/discharge, cable losses), you'll net roughly 20–28 Wh. That covers a camera in the 8–12 Wh/day range with a buffer.
• Recommended: 10–12W. Gives you headroom for cloudy streaks, winter months, or a camera that's more active than expected. Our 12W panel has a built-in controller running at 97.5% conversion efficiency — that matters more on overcast days where a PWM controller would lose 15–20% of available energy.
• Camera + lights or multiple cameras: 25W+. If you're running a camera plus a solar-powered floodlight for nighttime deterrence, step up to a 25W panel. Our 25W MPPT panel handles that load comfortably.

For context: our 8W multi-voltage panel supports switchable 5V/6V/9V/12V output, so it works with most camera charging voltages without a separate regulator. That flexibility matters on a jobsite where you might swap cameras between projects.

Step 3: Size Your Battery for Overnight + Bad Weather

The camera runs 24 hours. The sun doesn't. So you need enough battery to cover:

• Overnight: 12–16 hours of dark. At 8–15 Wh/day, that's roughly 4–10 Wh of overnight draw.
• Cloudy buffer: Plan for 2–3 days of minimal solar production. In the northeast US in November, you might get one good solar day out of five.

Battery sizing math:

Daily draw × autonomy days ÷ depth of discharge = battery capacity needed.

Example for a 12 Wh/day camera with 3 days of autonomy:

12 Wh × 3 days = 36 Wh needed. If using a 12V lead-acid battery (50% max depth of discharge), that's 36 ÷ 0.5 = 72 Wh → a 12V 6Ah battery. If using lithium (80% DoD), 36 ÷ 0.8 = 45 Wh → a 12V 4Ah LiFePO4.

Go lithium if the jobsite gets cold. Lead-acid loses 30–50% capacity below freezing. LiFePO4 retains 70–80% down to -20°C. Construction doesn't stop for winter, and neither should your camera.

Step 4: Mounting — This Isn't a Residential Install

Construction sites are temporary. Everything moves. Your solar setup needs to account for that.

Option A: Pole mount on temporary fencing or scaffolding.
This is the most common approach. A pole mount bracket clamps onto chain-link fence posts, scaffold tubes, or standalone poles. Advantages: keeps the panel elevated (less shade from equipment and material piles), adjustable angle, and easy to relocate as the build moves through phases. The pole mount kit fits standard 1.5"–3" poles — which covers most temporary fencing and scaffold tube diameters.

Option B: Tripod or weighted base.
For maximum portability. Set up next to the camera location, reposition in minutes. The downside: anything at ground level on a construction site will get bumped by equipment, buried in material deliveries, or driven over. Seriously. If you go this route, use a high-visibility base and keep it out of traffic lanes.

Mounting tip from our manufacturing side: Whatever mount you use, make sure the panel tilts toward true south (in the northern hemisphere) at roughly your latitude angle. A flat-mounted panel on a vertical fence post loses 20–30% of potential output. Our pole mount has adjustable tilt for exactly this reason.

Step 5: Ruggedize for Construction Conditions

A construction site is not a backyard. Your solar panel and battery face:

Dust. Constant. Earthwork, concrete cutting, drywall — it all coats the panel surface and cuts output. Wipe the panel weekly, or after any major dust-generating activity. A dusty panel can lose 15–25% output. ETFE-coated panels shed dust better than bare glass because of the hydrophobic surface, but nothing replaces a quick wipe.

Vibration. Heavy equipment, pile driving, concrete trucks. If your panel is mounted to scaffolding or a structure that vibrates, check all fasteners monthly. Locknuts or thread-locking compound (blue Loctite) on every bolt.

Theft of the panel itself. This is real. A $50–60 solar panel sitting on a fence is an easy target, especially on a site without 24-hour security (which is... the whole reason you need the camera in the first place). Use security fasteners (Torx or hex-socket bolts, not Phillips), and if the panel powers your only security camera, consider a cable lock as a visual deterrent. Some contractors mount the panel high enough on scaffolding that casual theft requires a ladder.

Weather exposure. No protected eaves, no overhangs. The panel takes full sun, rain, hail, and wind. Look for panels rated IP65 or higher. If your battery enclosure isn't NEMA 4X rated, put it in a weatherproof junction box. Moisture + battery connections = corrosion = eventual failure.

Step 6: Wiring and Voltage Matching

This trips up a lot of first-time setups. Your system chain: solar panel → charge controller → battery → camera.

Voltage matching matters. Most 4G security cameras run on 5V USB or 12V DC. If your panel outputs 12V and your camera wants 5V, you need a buck converter (or use a panel with switchable voltage output). Running 12V into a 5V camera without conversion will damage or destroy the camera. We've seen this on product reviews more times than we can count — "solar panel killed my camera" is almost always a voltage mismatch.

If you want simplicity, a panel with built-in charge controller and matched voltage output eliminates two potential failure points. Our 8W and 12W panels come with switchable voltage and integrated charging circuits for this reason.

What About Dedicated Construction Camera Systems?

Companies like Sensera, OxBlue, and EarthCam sell all-in-one solar construction camera packages — panel, battery, camera, mount, cellular, cloud storage. They work. They're also $200–500/month in subscription fees.

If you're a general contractor running multiple sites, those subscriptions add up. An alternative: buy a quality 4G camera ($100–200), pair it with an 8–12W solar panel ($52–59), a pole mount ($50), and a LiFePO4 battery ($30–60). Total hardware: $230–370, one time. You own the footage, you control the camera settings, and you move the whole rig from site to site.

The trade-off is setup time and troubleshooting. The all-in-one systems are plug-and-play. DIY means you're your own integrator. For a single camera, DIY makes sense. For 10+ cameras across multiple sites, the managed solution might justify the subscription.

Quick Sizing Cheat Sheet

The Bottom Line

Construction site cameras need power before the power shows up. Solar handles that — if you size correctly. The biggest mistakes are undersizing the panel (buy at least 2× your daily draw), skipping battery autonomy for cloudy days, and ignoring the dust/theft/vibration realities of a jobsite.

For a single 4G camera, an 8–12W panel with MPPT charging and a LiFePO4 battery covers most sites in most seasons. Need help matching a panel to your specific camera model and site conditions? Send us your camera specs and location — we'll confirm the right panel size before you order.