Browse Articles
Calculator
Browse 5 in-depth Calculator guides from Solar Planner Guide. Our editorial team researches and writes each one to give you clear, practical answers, current as of August 2026. The newest are shown first.
Solar Costs & Savings
Solar Savings Calculator: Estimate Your Annual Costs
Most people who plug their address into a solar savings calculator walk away thinking they understand what …
Home Battery Storage
80% Depth of Discharge: Solar Battery Sizing Calculator
Sixty-nine percent of homeowners who buy a solar battery end up with one that’s either too small to get …
Solar Financing
Calculate Your True Solar Installation Cost
You’re about to spend $25,000 to $40,000 on something you don’t fully understand yet. That’s …
Solar Costs & Savings
Calculate Your Solar System Size Perfectly
Most solar calculators are built by installers who want to sell you a system. That’s not a conspiracy …
Solar Costs & Savings
When Will Your Solar Investment Pay For Itself
You just got a solar quote for $28,000. The salesperson mentions “about seven years” to pay it …