Wattmargin Support

Help with backup-source limits, appliance loads, runtime estimates, circuit notes, readiness checks, and PDF plans.

Better Estimates

Use the running watts, startup watts, capacity, efficiency, and fuel-rate information from your exact equipment labels and manuals. Runtime is an estimate and should be treated conservatively.

Electrical Safety

Never backfeed a building through a receptacle. Use equipment only as its manufacturer directs. Fixed wiring, transfer equipment, and uncertain electrical work belong with a licensed electrician.

Need Help?

Email support@shadowfetch.com with Wattmargin, your device model, iOS version, and a short description. For an electrical emergency, contact local emergency services or a qualified electrician.