Aurora Solar Blog
Aurora Solar Blog

Solar design tips, sales advice, and industry insights from the premier solar design software platform

Christopher Hopper is the co-founder of Aurora Solar.

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Aurora Solar Blog

Four Steps to Optimize PV System Performance in Shaded Conditions

Christopher HopperChristopher Hopper

Assessing the impact of shading on system performance is an essential step in solar design. Especially in the residential market, solar designers often deal with shading issues like trees, chimneys, and other obstructions.

The question designers often face then is: given these conditions, how do I maximize system performance?

This is not an easy question to answer because shading can affect performance in a nonlinear way. However, an optimal solution can be found by following four steps.

1. Quantify. What’s the best way to quantify the impact of shading? Solar Access measurements are useful as a guide but have limitations because they do not account for system configuration. Thankfully, modern, module-level simulation engines can accurately model the impact of shading on performance. (Simulation engines that model system performance at a submodule level offer even more accurate estimates of energy production when modules are partially shaded.)

Aurora’s performance simulation feature quantifies energy losses from shade and other sources.

2. Explore. Systems come in countless combinations of size, location, and configuration. Designers have several options to mitigate shading losses:

3. Assess. Cost-benefit analysis ultimately leads to the “optimal” system design. But value is not always easy to determine. With time-of-use and tiered rates, the compensation for each kWh produced by the system can vary greatly. It can sometimes be better to place a system where there is more shade overall, but the system remains unshaded during high-value times. A detailed financial model that can handle these nuances is essential.

An example of time-of-use rates, showing higher energy prices at times of higher energy demand.

4. Automate. A detailed site assessment takes time. Without the ability to quickly assess a variety of design variants, how many iterations can you afford to do? And how do you know if your design is really the optimal solution? Putting a streamlined process in place is crucial.

We believe software can empower solar designers to make these critical design decisions in an efficient manner. That is why we built Aurora to streamline the design process from remote shade measurements and module-level performance simulations, pricing and detailed financial analysis, all the way to proposal generation — and Aurora’s AutoDesigner even generates an optimal system design for you at the click of a button.

Christopher Hopper is the co-founder of Aurora Solar.

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