Tools
Two working tools and one checklist live here. The runtime calculator turns your load list into hours. The cost per usable watt hour table turns marketing prices into a fair comparison. The buying mistakes checklist is the ten minute drill to run before any purchase in this category.
The tools are client side only. They save nothing, ask for nothing, and show their inputs and math on the page, because a black box calculator is just an opinion with better design.
A panel compatibility checker is planned for the first post launch wave, not today. It needs a per model database of input watts, voltage, and current, verified model by model, because a wrong answer there can damage equipment. The explainer version is live now under Solar and Panels and takes five minutes to use with your spec sheet.
The tools themselves
Runtime calculator
Pick your loads and a battery, get hours, with the 85 percent usable factor and a motor surge check built in.
Runs in your browser, saves nothing
Cost per usable Wh table
The big three systems priced per usable watt hour, sortable, with panels and tax included and the checked date on the table.
Checked November 7, 2026Best first reads
Power station buying mistakes
The five spec sheet tricks that cost buyers money: surge sold as continuous, rated sold as usable, buried solar caps, proprietary cables, and short warranties.
Checked November 7, 2026All Tools guides
Power station buying mistakes
The five spec sheet tricks that cost buyers money: surge sold as continuous, rated sold as usable, buried solar caps, proprietary cables, and short warranties.
Checked November 7, 2026Still deciding where you fit? Answer the three questions and get routed.
Start here