Here’s why your solar PV arrays aren’t considered identical

When installing solar PV arrays, it is important that the panels are similar but not identical. If they are not similar, then the solar panel installation will not be as effective as it could be. This is because the panels in a solar panel installation must be aligned with each other to create an energy-producing unit. If there is even a small discrepancy in their dimensions, their performance will be compromised.

Solar PV arrays are a great way to reduce your carbon footprint and save on energy costs. However, you may have noticed that each panel in your array isn’t generating the same amount of power. There are various reasons why this may be the case. Solar panels are designed to convert sunlight into electricity. However, they can only do this efficiently if they’re placed in an optimal location. If one of your panels is shaded by a tree or building, it will produce less power than the others. Additionally, panels can become dirty or covered in snow, which can also impact their efficiency. Finally, each panel is slightly different, so some will naturally be more efficient than others. However, if you notice that one of your panels is consistently underperforming, it’s a good idea to have it checked out by a professional.

About solar PV arrays:

Solar photovoltaic (PV) arrays are groups of interconnected solar cells that capture sunlight and convert it into electricity. These panels come in a variety of sizes and shapes. They can be used for a variety of applications, from powering small electronic devices to providing electricity for entire communities. Solar PV arrays are made up of individual solar cells. These cells are made from silicon crystal “ingots.” The ingots are cut into thin, square solar wafers, which are then assembled into solar cells. The solar cells are then connected together to form the array.

These arrays can be configured in a number of different ways. However, it depends on the application for which they will be used. For example, a grid-connected solar PV array that is used to power a home or business will be configured differently than a stand-alone solar PV array that is used to provide electricity for a remote community. Solar PV arrays are typically mounted on rooftops or ground-mounted structures. They can be oriented in a number of different ways to maximize their exposure to sunlight. Solar PV arrays are an efficient and clean way to generate electricity, and they have the potential to play a major role in the transition from fossil fuels to renewable energy.

Variation in solar array sun exposure

Solar PV arrays are a great way to generate electricity, but they can be affected by shading. Shading can vary depending on the time of day and the location of the panel. The panels on the bottom left of the solar panel installation generated 2.71 Megawatt-hours (2,710 kilowatt-hours), whereas the panel on the top right produced 2.97 Megawatt-hours (2,970 kilowatt-hours). While the difference looks to be small, it is actually a 10% swing (based on the 2.71 MWh panel).

While part of the variance may be due to manufacturing variation as explained above, the majority of the difference is most likely due to shading variation. In fact, all of the panels on the west end (left) produce somewhat less than all of the panels on the east end (right). That means there is less shade on the array in the morning than in the afternoon. Solar panels are a great way to generate electricity, but it’s important to keep shading in mind when installing them.

Temperature changes

Solar panels are affected by the temperature. As the temperature of the solar panel increases, the output of electricity decreases. The temperature effect is not large, but it is significant when sizing inverters. Solar panels constantly convert the panel’s direct current to household alternating current. If the temperature of the solar array varies, this can result in unequal electricity generation. Solar PV arrays are a great way to generate electricity, but it is important to be aware of the temperature effects on them.


Solar PV arrays are a great way to generate clean energy, but they can be susceptible to soiling. Soot from a chimney, pollen, bird droppings, and other particles can all have an impact on panel performance. And that debris is unlikely to be dispersed uniformly across all of the panels in your array. This result in variances in panel output. So, it’s important to keep an eye on your panels and clean them off when necessary. A little bit of maintenance can go a long way towards keeping your solar PV array running at peak efficiency.

The panels’ angle/tilting

PV arrays are made up of solar panels, which are mounted on a frame and angled to face the sun. The angle of the panels is important as it affects how much sunlight they receive and how efficiently they convert it into electricity. Solar PV arrays are typically installed at a fixed angle. It means that the panels do not move to track the sun throughout the day. However, in some cases, solar panels are installed on tilting frames that allow the panels to be adjusted to follow the sun’s path. This can provide a boost to power production as more sunlight is captured during the day. However, it also means that each PV array is slightly different, as the tilt angle will vary depending on the location and time of year. As a result, no two solar PV arrays are exactly alike.

Read here: Solar Panels on Roof Shingles: Pros and Cons


When installing solar PV arrays, it is crucial to consider the importance of panel similarity while acknowledging that variations will exist. Ensuring similarity among panels is essential for optimal alignment and effective energy production. Factors such as shading, temperature changes, soiling, and panel tilting can contribute to performance discrepancies among the panels. While some variations may be attributed to manufacturing differences, it is important to monitor and address issues related to shading, temperature effects, and soiling to maximize the efficiency of the solar PV array. Despite these variations, solar PV arrays remain a valuable and clean source of electricity, offering great potential in the transition to renewable energy and reducing carbon footprints.


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