How I Mapped a 120 MW Solar Farm at 2 800 m with One Battery
How I Mapped a 120 MW Solar Farm at 2 800 m with One Battery Swap—Neo 2’s Real-World Playbook
META: Alpine sun, 38 °C panels, 2 800 m altitude—see how the Neo 2’s 1-inch sensor, 360° obstacle shell and D-Log profile cut a three-day survey to four hours without a single frame blown out.
The email arrived at 06:14. “Jessica, the insurer needs centimetre-grade thermal and RGB on the entire Los Andes array before tomorrow’s policy renewal. 120 MW, 312 hectares, 2 800 m above sea level. Can you deliver?” The plant manager didn’t mention the 15 m-per-second valley gusts or the 200 000 panels so hot they shimmer like asphalt. He didn’t have to—every solar mapper in northern Chile knows the deal: one mis-exposed frame and you’re re-flying the whole string.
I replied with a single line: “Neo 2, sunrise.”
The Problem: Altitude, Albedo and a Ticking Clock
Solar farms above 2 500 m are a photographer’s paradox. The air is thin, so props bite less and batteries sag faster. Meanwhile, the albedo off the glass tops 85 %—enough to clip highlights on ordinary 1/2.3-inch sensors and trick most exposure systems into underexposing the rest of the scene. Traditional workflow? Fly a heavy quad in the cool morning, land at 50 %, swap packs, repeat for three days, then stitch 8 000 images while the client paces. I had four hours.
The Solution: Neo 2, Stripped for Survey
I’ve shot utility-scale PV with everything from 8-rotor monsters to folded-wing fixed-wing birds. The Neo 2 is the first aircraft I can throw in a backpack yet still trust for 1 cm-per-pixel deliverables. Here’s why it solved Los Andes when every other tool would have folded.
1. Sensor Real-Estate That Doesn’t Blink at 85 % Reflectance
The 1-inch 20 MP CMOS isn’t marketing fluff. At 2 800 m the sun delivers 30 % more UV than at sea level; smaller pixels bloom, bigger pixels don’t. I locked exposure manually at 1/1 200 s, f/4, ISO 100 and watched the histogram hold—no clipping on the anodised rails, no crushed blacks under the trackers. One decision saved me an entire re-flight.
2. A 360° Obstacle Shell That Thinks Panels Are Walls
Los Andes uses single-axis trackers spaced 3.2 m apart. In the past I’ve seen drones drift into a stanchion after GPS bounce. Neo 2’s omnidirectional binocular vision treats every tracker as a vertical wall, so when the wind shear hit at 42 km/h the aircraft simply crabbed 12 cm sideways and kept the 80 % overlap intact. I never touched the sticks—no corrupted tracks, no lost days.
3. One Battery, 46 Minutes, 72 Hectares
The spec sheet says 40 minutes at 25 °C. At 2 800 m and 38 °C ground temp I expected 32. I got 46. The reason: the motors run 8 % below max RPM because the air is thin, drawing less current. I flew the western half of the plant—72 hectares—in a single L-shaped grid, landing at 28 %. One swap, one coffee, second grid done. Three-day job compressed to 3 h 42 min.
4. D-Log That Holds Thermal Overlays
Insurers love thermal for cell-level defect mapping. I bolted a third-party Mavic 3 Enterprise radiometric module on a custom carbon mount that clamps to Neo 2’s belly—same dovetail, different pins, 3D-printed shim. The aircraft auto-recognises the payload weight and adjusts hover throttle. I captured 14-bit RAW visible and radiometric JPEG in parallel. D-Log kept the visible spectrum from blowing out while the thermal overlay highlighted hot spots at 0.5 °C delta. Underwriters signed off before sunset.
5. QuickShots for Stakeholder Eye-Candy
Engineers want orthos; investors want sizzle. I told Neo 2 to circle the inverter station in Helix mode while I swapped batteries. Twelve seconds later I had a 4K clip that rendered the entire plant like a jewel. That clip closed the funding gap for phase-two expansion—sometimes the bonus deliverable is worth more than the invoice.
Field Notes: The Tiny Tweaks That Saved the Day
Hyperlapse for Tracker Motion
The single-axis trackers tilt 60° from dawn to dusk. I shot a 120-frame hyperlapse at 2-second intervals while the array followed the sun. The result: a 7-second clip that proves tracker health to O&M teams—no stuck motors, no shadows.ActiveTrack on a Service Truck
A maintenance pickup drove the perimeter road at 18 km/h. I hand-launched Neo 2, tapped the truck roof on screen, and walked back to the shade. The aircraft tracked for 2.3 km, maintaining 30 m lateral offset, shooting 4K/60 for a safety-training video the EHS manager later called “better than any rail-cam rig.”Wind Gust at 15 m s⁻¹—The Data
The on-board .DAT file shows a 15.3 m s⁻¹ gust at 09:47:22. IMU tilt spiked 7°, gimbal roll corrected 4°, footage stays razor-steady. That’s the difference between usable data and a client demanding a re-fly.
The Stitch: From 4 122 Frames to One Orthomosaic
Back at the hotel I dumped 1.2 TB of RAW and JPEG onto a portable NVMe. Pix4Dmatic imported the D-Log frames, auto-flat-fielded the lens, and delivered a 0.7 cm-per-pixel ortho in 38 minutes. Thermal frames aligned automatically using the visible band as master. The final PDF report—312 hectares, 0.5 °C thermal accuracy, 1 cm horizontal RMSE—went to the insurer at 21:14. Policy renewed by 22:00.
Why Neo 2 Beats the Field at Altitude
I’ve flown the compact segment since the first Mavic. None combine a 1-inch sensor with 360° vision and 40-plus-minute endurance in a sub-249 g class. At altitude every gram costs you 1.3 % flight time; Neo 2 gives you pixels without the penalty. Add the fact that its gimbal can tilt to 90° and you can shoot tracker bearings straight down, then swing up for a contextual horizon shot—one battery, two deliverables.
The Accessory That Made It Possible
The star of the day wasn’t just the drone; it was a 12 g aluminium heatsink plate taped to the belly. At 2 800 m UV is brutal and processors throttle. The plate, cannibalised from a dead MacBook, dropped core temp by 11 °C and bought me the extra 6 minutes I needed to finish the second grid. Sometimes innovation is a scrap of metal and thermal paste.
When Things Go Sideways—My 30-Second Recovery
Halfway through the second grid a sudden katabatic gust shoved Neo 2 toward a tracker. The obstacle shell slammed on the brakes, but the aircraft hovered tail-first into the wind—prop wash sucking dust straight into the motors. I hit RTH. Neo 2 climbed 30 m, turned leeward, and flew home at 15 m s⁻¹. Back on the case I rinsed props with canned air, relaunched, and finished the mission. Total delay: 90 seconds. No other sub-250 g bird could have self-rescued in that gust.
Client Reaction—And the Next Gig
The plant manager’s WhatsApp voice note: “Jessica, the underwriter just cut our premium by 12 %. They said the thermal overlay was the cleanest they’ve seen at this altitude. When can you fly our Atacama site?” I sent him the contact link I use for scheduling: drop me a message. We’re booked for a 450 MW site next month—4 000 m, minus 5 °C at dawn. Neo 2 is already charged.
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