The 20 percent rule for solar panels can help you save money in the long run
Tomorrow The 20 percent rule for solar panels can help you save money in the long run Building your system with some extra capacity makes managing it a bit easier. By Dave Meikleham July 25, 2026 1:30 pm EST Halfpoint/Shutterstock If you own a solar system, there's a good chance you'll have heard of the 20 percent rule. And if you haven't, it can be explained easily enough.
- ▪Tomorrow The 20 percent rule for solar panels can help you save money in the long run Building your system with some extra capacity makes managing it a bit easier.
- ▪By Dave Meikleham July 25, 2026 1:30 pm EST Halfpoint/Shutterstock If you own a solar system, there's a good chance you'll have heard of the 20 percent rule.
- ▪And if you haven't, it can be explained easily enough.
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Tomorrow The 20 percent rule for solar panels can help you save money in the long run Building your system with some extra capacity makes managing it a bit easier. By Dave Meikleham July 25, 2026 1:30 pm EST Halfpoint/Shutterstock If you own a solar system, there's a good chance you'll have heard of the 20 percent rule. And if you haven't, it can be explained easily enough. "n essence, it means estimating how much electricity your house needs, then sizing your solar panel system so that it produces roughly 20 percent more energy than your home uses. Think of it this way: if your home uses 40kWh per day, your panels should be producing 48kWh.
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