Yes, a solar eclipse affects solar panels. As the Moon blocks sunlight, the amount of solar irradiance reaching the panels falls and PV generation drops. Your panels do not need to be switched off, they are not damaged, and output returns as the eclipse passes. In a grid-connected home, the grid — or your battery, if you have one — simply supplies more of the house while solar production is temporarily lower.
The 12 August 2026 total solar eclipse crosses Greenland, Iceland, northern Russia, Spain and a small corner of Portugal, while a partial eclipse is visible across a much larger area including much of Europe, northwestern Africa, most of Canada and parts of the northern United States. That wide visibility makes this a rare real-world test of how photovoltaic systems respond when incoming sunlight changes rapidly.
That combination makes the event a useful real-world demonstration of the single most important fact about photovoltaic systems: solar panels respond to available light, not to the clock or the panel's advertised wattage.
What happens to solar panels during a solar eclipse?
Solar photovoltaic panels convert incoming light into electricity. The IEA Photovoltaic Power Systems Programme notes that PV power output depends essentially on the solar irradiance reaching the panels. During an eclipse, the Moon creates a large, predictable reduction in that irradiance.
So the sequence for a rooftop system is straightforward:
- The Moon begins to cover the Sun.
- Available sunlight falls and the panels produce less DC power.
- The inverter converts whatever power is available, so its AC output also drops.
- At maximum eclipse, generation reaches a temporary low.
- As the Moon moves away, irradiance and solar output increase again.
Where is the 12 August 2026 solar eclipse visible?
NASA describes the 12 August 2026 event as a total solar eclipse along a path crossing Greenland, Iceland, northern Russia, the Atlantic Ocean, Spain and a small corner of Portugal. A partial solar eclipse is visible across a much larger part of the Northern Hemisphere.
| Region | What viewers can see | Why it matters for solar PV |
|---|---|---|
| Greenland, Iceland, northern Russia, parts of Spain & Portugal | Total eclipse along the path of totality | Solar irradiance can fall extremely sharply around totality |
| Much of Europe | Partial eclipse, often deep near the totality path | Rooftop PV output can show a pronounced temporary dip |
| Northwestern Africa | Partial eclipse | Solar generation falls in step with available irradiance |
| Most of Canada & parts of the northern United States | Partial eclipse | Effect varies by location, local time, weather and eclipse magnitude |
Exact timing and eclipse depth depend on your location. The important solar-energy point is universal: PV panels react to the sunlight that actually reaches them, so locations with a deeper eclipse should generally see a larger temporary change in output than locations where only a small part of the Sun is obscured.
Why local time matters for solar panels
A 4.5 kWp array is rated at 4.5 kWp under standard test conditions, but real-time output depends on the Sun's position, roof orientation, weather and temperature. An eclipse adds another temporary reduction in available light. That means two identical solar systems in different cities can show very different eclipse-day generation curves.
Will 90% eclipse coverage mean 90% less solar power?
Not exactly. The percentage of the Sun's disc that is obscured is not the same measurement as the percentage drop in electricity from your panels. PV generation depends on the total irradiance reaching the array, and that is influenced by direct sunlight, diffuse sky light, cloud, roof angle, temperature and the Sun's position.
However, the direction is clear: a deep partial eclipse produces a large and rapid temporary fall in solar generation. Energy system operators have seen this in previous eclipses. During the 2024 North American eclipse, the U.S. Energy Information Administration documented lower utility-scale solar output and higher grid demand from homes and businesses with rooftop solar. The 2015 European eclipse similarly produced a sharp, forecastable change in PV generation.
If the eclipse is visible from your location and you monitor your inverter app, do not be surprised if the solar curve looks very different from a normal clear day.
Use your household electricity use to estimate a suitable solar system size and expected annual generation. It is a much better benchmark than judging your system from one unusual eclipse event.
Use the Solar System Size CalculatorWhat happens in a home with solar panels but no battery?
For a normal grid-connected solar home, you usually do not need to do anything. If your panels are producing 1 kW while your home is using 2.5 kW, the missing 1.5 kW is imported from the grid. During the eclipse, the same process happens automatically as solar output falls.
During the eclipse
If solar generation falls and demand stays the same, grid import rises to fill the gap.
When the Moon moves away from the Sun and the panels recover, grid imports fall again. The eclipse does not require a reboot or a manual change to the inverter.
What if you have a solar battery?
A home battery can soften the effect you see at the meter. Depending on your battery settings, state of charge and power limit, the battery may discharge when solar generation falls below household demand.
That can turn the energy balance into:
Solar + battery home
If the battery has enough charge and power capability, grid import may remain low even while panel output drops.
Battery storage also helps at grid scale. EIA highlighted batteries as an important tool for balancing the electricity system during the 2024 eclipse because they can discharge when solar generation falls.
If you are deciding whether a battery is useful for your home beyond one eclipse, size it around your normal evening consumption and solar surplus, not around this rare event. Our Battery Storage Calculator is designed for that decision.
Could the solar eclipse cause a power cut?
A solar eclipse creates an unusual ramp down and ramp up in solar power, but it is also one of the most predictable changes an electricity system can face. Grid operators know the eclipse timing far in advance and can prepare other generation, storage and reserves.
Previous high-solar grids have managed eclipse events successfully. The IEA PVPS review of the 2015 European eclipse described the event as manageable with forecasting, reserve planning and coordination. EIA also reported that utilities prepared for the 2024 eclipse by scheduling other resources to supplement lost solar generation.
For an individual homeowner with a grid-connected solar system, the practical message is simple: you should not expect to manage the grid yourself or turn your panels off.
Does a solar eclipse damage solar panels or the inverter?
No. A solar eclipse is not harmful to PV equipment. From the panel's point of view, it is a temporary reduction in light — unusual in shape, but not fundamentally different from a fast-moving dark cloud reducing irradiance.
Solar panels are designed to operate across changing light levels every day. The inverter continuously adjusts to the available DC power from the array. When sunlight returns, output rises again automatically.
Will the eclipse affect your annual solar savings or payback?
For a household system, one eclipse is not a meaningful reason to change a solar investment decision. It reduces generation for a short period on one day. Your annual result is dominated by thousands of daylight hours across the year, electricity prices, system size, orientation, shading, self-consumption and export rates.
That means you should not use 12 August as a test of whether your solar installation is “working well” compared with a normal August day. The event is intentionally abnormal compared with a normal solar-production day.
Calculate the numbers that actually matter all year
Estimate annual solar generation, household savings and the effect of self-consumption using your own electricity use and prices.
Use the Solar Savings CalculatorA useful experiment for solar owners: watch your inverter curve
If the weather is reasonably clear, the eclipse gives solar owners a rare opportunity to see how quickly PV output can respond to a large change in irradiance. You can make the event more useful by recording:
- solar generation 15–30 minutes before first contact;
- generation every 10–15 minutes as the eclipse deepens;
- generation around maximum eclipse;
- battery discharge or grid import at the same times;
- cloud conditions, so you do not confuse cloud effects with the eclipse.
Do not compare raw kW readings with the panel system's kWp label. The system's rated kWp is a laboratory-style peak capacity, not a promise of real-time production. If you want a better explanation of this difference, read our guide to use our Solar System Size Calculator.
Solar eclipse viewing safety: panels do not make the Sun safe to look at
The most important eclipse advice has nothing to do with electricity. Never look directly at the Sun without proper protection during partial phases. NASA says regular sunglasses are not safe for viewing the Sun.
For direct viewing, use safe eclipse glasses or a handheld solar viewer that complies with the ISO 12312-2 international standard. Cameras, telescopes and binoculars require a proper solar filter attached to the front of the optics. A pinhole projector is a safe indirect-viewing alternative.
Frequently asked questions
Do solar panels work during a solar eclipse?
Yes, but their output drops as the Moon blocks sunlight. Solar PV output depends on the irradiance reaching the panels, so a deep partial eclipse can cause a sharp temporary fall in generation. Output rises again as the Moon moves away from the Sun.
Will the 12 August 2026 eclipse damage my solar panels?
No. A solar eclipse is simply a predictable reduction in incoming sunlight. It does not damage normal solar panels or require homeowners to switch their system off.
Will 90% solar eclipse coverage mean 90% less solar power?
Not exactly. Solar-disc coverage and PV output are related, but they are not identical measurements. Panel output depends on total irradiance, including diffuse light, cloud, roof angle, temperature and the Sun's low evening position. Expect a large temporary drop, not a precise one-for-one percentage.
What happens to a home with solar panels and no battery during the eclipse?
If solar generation falls below household demand, a normal grid-connected home simply imports more electricity from the grid. When solar output recovers, grid imports fall again automatically.
What happens if I have a solar battery during the eclipse?
Depending on your battery settings and state of charge, the battery may discharge to cover some or all of the shortfall while solar generation is low. If the battery cannot cover the load, the home imports the remainder from the grid.
Where is the 12 August 2026 solar eclipse visible?
The eclipse is total across parts of Greenland, Iceland, northern Russia, Spain and a small corner of Portugal. A partial eclipse is visible across much of Europe, northwestern Africa, most of Canada and parts of the northern United States. Exact timing and eclipse depth depend on location.
Sources and methodology
- NASA — 12 August 2026 total solar eclipse path and visibility
- NASA — eclipse viewing safety and ISO 12312-2 guidance
- U.S. Energy Information Administration — solar generation and grid response during the 2024 eclipse
- IEA PVPS — power-system operation during the 2015 European solar eclipse
Published 11 August 2026. Eclipse timings and coverage vary by location. Solar generation varies with weather, roof orientation, shading, equipment and system settings. This article is educational and is not engineering or electrical-safety advice.