Backup power, without the hype
Know where the energy comes from.
Independent guides to backup power, flywheel storage, DIY energy projects and Home Power Shield—built around measurable claims and realistic expectations.
Start here
Four paths through the topic.
Flywheel Energy
Learn what a flywheel stores, how energy returns, and why input matters.
Learn flywheels →From problem to informed decision.
1 · Define the load
What must stay powered, and for how long?
2 · Trace the energy
Where does input energy come from, and where is it stored?
3 · Compare evidence
Use watts, watt-hours, runtime and safety—not vague promises.