Published by
Radiant Energy Solar — Orlando, FL
Wondering if your solar panels are pulling their weight? The quickest way to find out is right in your pocket. Just open your solar monitoring app or take a look at your inverter's display. On a bright, sunny day, you should see it actively generating kilowatts (kW). Solar panels are built to be tough, but a "set it and forget it" mindset can cost you real money over time.
Three Methods to Check Your Solar Panel Health
Before you grab a ladder or start digging through your app, here's a quick rundown of the different ways to test your panels — what you'll need, how tricky each one is, and what each method actually reveals.
| Method | Tools Required | Difficulty | What It Tells You |
|---|---|---|---|
| Monitoring System | Smartphone or Computer | Easy | Real-time and historical energy production data |
| Visual Inspection | Binoculars (optional) | Easy | Physical damage, debris, or shading issues |
| Multimeter Test | Multimeter, Safety Gear | Advanced | Precise voltage and current output of individual panels |
1. Check Your Monitoring System First
Without a doubt, checking your energy output data is the most reliable way to know what's going on. Almost every modern solar setup comes with an inverter that tracks both real-time generation and your system's total production over time. Most systems come with monitoring software that can even alert you if your production drops unexpectedly.
The easiest place to start is with the daily production graph. On a bright, sunny day, you should see a smooth, consistent bell curve — starting low in the morning, climbing to a peak around midday, and gently sloping back down as the sun sets. If you see a jagged, spiky graph on a cloudless day, that is a red flag worth investigating.
2. Conduct a Visual Inspection
Before digging into monitoring data or using a multimeter, your first and easiest check should always be a visual inspection. From a safe spot on the ground, a quick walk-around can tell you a surprising amount about your system's health.
What to look for during your visual check:
- Physical Damage: Look for cracks, chips, or spiderweb-like fractures on the glass. Even a small impact from a stray branch can let moisture seep in.
- Discoloration: Brown, yellow, or burnt-looking spots on the cells are a classic sign of "hot spots" — a single cell failing and overheating.
- Debris Buildup: Significant accumulation of dirt, leaves, pollen, or bird droppings. A single leaf's shadow can have a disproportionately large impact on efficiency.
- Mounts and Wiring: Check that mounting racks and clamps look solid and secure. Look for frayed cables, cracked insulation, or loose connections.
A visual inspection isn't just about finding catastrophic failures. It's about catching the small, easily fixable things — like a dirty surface or a loose wire — that quietly steal your energy production day after day.
3. Run a Multimeter Test (Advanced)
If monitoring data and visual checks don't reveal the issue, a multimeter can test the precise voltage and current output of individual panels. This method requires safety gear and basic electrical knowledge. For most homeowners, this step is best left to a certified solar technician.
Not sure if your system is performing at its best? Our Radiant Energy Solar team in Orlando offers free performance reviews for existing solar installations.
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