If you’ve spent any time working in or around the aviation industry—whether as a maintenance technician, avionics engineer, or even a hobbyist building a small unmanned aerial vehicle (UAV) with solar power—you’ve likely heard the constant debate over adapting terrestrial solar components for aerospace use. One of the most common questions I get here at Solar Grounding Cable (our actual team, not some AI-generated placeholder) is: Can a standard solar grounding cable work in a solar-powered avionics system? It’s a fair question. On one hand, solar power for aircraft has been gaining traction in recent years, from long-endurance UAVs to small general aviation planes with auxiliary solar panels. On the other hand, avionics systems operate in an environment that’s nothing like a residential rooftop solar setup, where durability and strict electrical safety rules are often treated as “nice-to-have” rather than non-negotiable. After 12 years in the solar grounding cable business, 8 of which have included working directly with aerospace engineers testing solar-powered avionics, I’m here to break this down honestly—no sales jargon, no oversimplified tech talk, just what works, what doesn’t, and why our grounding cables are designed to fill the gap when standard parts fall short. Solar Grounding Cable
First, let’s ground this in reality: solar-powered avionics aren’t the same as a backyard solar array. Avionics systems—think navigation, communication, flight control computers, and even passenger entertainment systems in small solar-assisted planes—rely on sensitive, low-voltage electronics that are vulnerable to even tiny electrical anomalies. Lightning strikes, static buildup, electromagnetic interference (EMI), and fault currents from faulty wiring are all constant risks in the sky. Terrestrial solar grounding cables are built for ground-based conditions: they resist UV radiation, yes, but they’re often not rated for the temperature swings, vibration, or corrosion that aviation systems face. A standard solar grounding cable might work in a low-stakes test environment, but once you get 10,000 feet up, where temperatures flip from 80°F on the ground to -40°F at cruising altitude, and vibration from propellers or jet engines shakes every component, that cable’s performance can drop fast. I’ll admit, we’ve seen this first-hand: a customer once tried using off-the-shelf solar grounding cable on a small UAV test drone, and after three flights, the cable’s outer jacket cracked from the vibration, leading to a short that fried the avionics’ GPS module. That’s the kind of mistake that keeps both engineers and grounding cable suppliers up at night.
But here’s the good news: “standard” solar grounding cables don’t belong in avionics, but purpose-built solar grounding cables? That’s a different story. Let’s get into the technical reasons why our cables work for solar-powered avionics, because that’s where most of the confusion comes from. The core job of a grounding cable in any solar system is to provide a low-resistance path for fault currents to flow safely to ground, preventing damage to electronics and personnel. But in aerospace, that job adds a whole layer of requirements: EMI/RFI shielding, vibration resistance, temperature stability, and compliance with strict aviation standards like DO-160 (the standard for environmental conditions and test procedures for aircraft equipment). Our solar grounding cables are engineered specifically to meet these needs, and over the years, we’ve worked with avionics manufacturers to refine them for this exact use case.
Take temperature rating, for example. Terrestrial solar grounding cables are usually rated for -40°F to 185°F, which is fine for a rooftop. In aviation, though, avionics bays can swing from -67°F to 257°F depending on altitude and proximity to engine heat. Our cables are rated for -65°F to 266°F, so they stay flexible and conductive no matter how high or low the aircraft’s system operates. That’s not a random number—we tested this last year with a small drone developer in Oregon, who runs flight tests at altitudes up to 12,000 feet. Their original terrestrial cables hardened at 10,000 feet, causing connection issues, but our cables held their flexibility and conductivity through 12 consecutive test flights, no problems. We also use a specialized cross-linked polyethylene (XLPE) jacket that’s reinforced with a woven aramid fiber core, which is different from the standard PVC jacket used in most solar grounding cables. Aramid is the same material used in bulletproof vests, so it handles the constant vibration from propellers and aircraft engines far better than PVC, which can crack or fray over time.
Then there’s EMI and RFI, which is a huge deal for avionics. Your radio, GPS, and flight control system all rely on precise electrical signals, and stray electromagnetic interference from solar panels or wiring can cause them to glitch, or worse, fail mid-flight. Standard solar grounding cables have minimal shielding, if any, because terrestrial installations rarely face high levels of EMI from other systems. Our solar grounding cables, though, feature a three-layer shielding system: a tinned copper braid, an aluminum mylar shield, and a drain wire that provides a direct path for unwanted interference to ground. This isn’t overkill—we worked with an avionics engineering team in Texas last year that was having constant GPS signal dropouts on their solar-powered UAV until they swapped out their standard grounding cables for ours. The shielding blocked the electrical noise from the solar panels and power wiring, and within a week, their signal stability improved by 98%, according to their test data. That’s the kind of tangible result that matters when you’re flying a drone in remote areas.
Corrosion resistance is another factor that’s often overlooked. In aviation, especially for planes operating near coastal areas or in high-humidity regions, wiring is exposed to salt air, moisture, and other contaminants that can cause corrosion over time. Standard solar grounding cables use bare copper conductors, which will corrode within a few years when exposed to salt air. Our cables use tinned copper conductors, which are coated in a thin layer of tin that resists corrosion far better than bare copper. We also use a sealed, IP67-rated connector on our avionics-specific solar grounding cables, which prevents moisture and dust from getting into the connection point—something that’s non-negotiable for aircraft operating in rain or snow. I’ve had a customer in Florida call us last spring, saying their old standard solar cables had corroded so badly after 18 months of flying their small solar-assisted Cessna that the ground connection failed during a pre-flight check. They swapped to our cables, and six months later, they haven’t had a single corrosion-related issue. That’s the kind of reliability you can’t get from a terrestrial part.
But wait—does that mean you can just pick any solar grounding cable and plug it into your avionics system? No, and that’s a critical point to clarify. There are a few key caveats when working with solar power in avionics, even with a properly designed grounding cable. First, you have to make sure the cable’s current rating matches your system’s requirements. Avionics systems, especially for larger planes or long-endurance UAVs, can have higher fault currents than small residential solar systems, so undersized cables can overheat and fail. Our avionics-specific solar grounding cables come in 10 AWG to 2 AWG sizes, with current ratings up to 150 amps, so we can match almost any avionics system’s needs. Second, you have to follow proper grounding practices specific to aircraft: that means using the aircraft’s dedicated chassis ground, not a random metal bolt, and making sure all connections are torqued to the manufacturer’s specs to maintain a low-resistance path. We always include a free technical guide with every bulk order of our avionics cables, outlining best practices for installation in solar-powered avionics systems, because even the best cable won’t work if it’s installed incorrectly.
I also want to address a common misconception: some engineers think that since avionics systems are already grounded to the aircraft’s frame, adding a separate solar grounding cable is unnecessary. That’s a mistake. Solar panels generate direct current (DC), and when there’s a fault in the solar array, that DC current needs a clear path to ground—especially in systems where the solar panels are mounted on the wings or fuselage, isolated from the main avionics frame. Without a dedicated grounding cable, that fault current can travel through the wiring of the avionics system itself, damaging sensitive components. I’ve seen a case where a UAV developer skipped the solar grounding cable, and a fault in the solar array caused $12,000 worth of damage to their flight control computer—all because they tried to save a few dollars on a grounding cable, opting for a standard terrestrial part instead of a purpose-built one.
Now, let’s talk about the future, because solar-powered avionics is only going to grow. More small general aviation planes are adding auxiliary solar panels to power avionics and reduce fuel use, and long-endurance solar UAVs are being used for everything from environmental monitoring to emergency communication. The demand for reliable, aviation-grade solar grounding cables is only going to increase, and we’re already working on the next iteration of our cables, which will be compliant with DO-160G, the latest aviation standard for environmental testing, so they’ll meet even stricter requirements for vibration, temperature, and corrosion.
At the end of the day, the answer to “Can a solar grounding cable be used in a solar-powered avionics system?” is: not a standard terrestrial one, but a purpose-built, aviation-grade solar grounding cable absolutely can—and should. The key is choosing a cable that’s engineered for the specific environmental, electrical, and regulatory requirements of aviation, not just the ones of a rooftop solar array. After 12 years in this business, I’ve seen too many projects fail because they cut corners on components like grounding cables, and too many succeed because they invest in parts that are built for the job.
If you’re working on a solar-powered avionics project—whether it’s a small UAV, a general aviation plane, or anything in between—and you’re not sure what grounding cable you need, we’re here to help. We’ve worked with hundreds of avionics engineers, drone developers, and aircraft maintenance teams over the years, and we can help you choose the right cable for your specific system, no matter how big or small. Whether you need a sample to test, bulk quantities for a production run, or technical guidance on installation, our team is ready to answer your questions and help you find a reliable solution. Don’t take chances with a component that’s critical to the safety and performance of your avionics system—reach out to us to discuss your project today.
UL PV Wire References:
- Federal Aviation Administration. (2020). Aviation Electrical Systems and Equipment Certification Standards (DO-160G). U.S. Department of Transportation.
- International Maritime Organization. (2019). Guidelines for Solar Power Systems in Small Marine and Aviation Vessels. IMO Circular MSC.1/Circ.1589.
- Solar Energy Industries Association. (2021). Technical Guidelines for Grounding and Bonding in Solar Photovoltaic Systems. SEIA Standard 2021.
- American Society for Testing and Materials. (2020). Standard Specification for Flexible Electrical Conductors for Aerospace Applications. ASTM B172-20.
Tianjin Xilingke New Energy Technology Co., Ltd.
Address: Suite 2601, Tower B, Wanghai International, Haihe East Road, Hebei District, Tianjin, China.
E-mail: robin@sinelinkev.com
WebSite: https://www.sinelinkenergy.com/
