The short version: Blackout Calc is a free planning tool. Its estimates do not confirm that equipment is suitable or safe for your home. Check equipment ratings and get professional help before connecting backup power to home wiring.
Using the site
Blackout Calc is operated by DEV2REV. These terms apply when you use the site. If you do not agree, do not use it.
The calculator runs entirely in your browser. There are no accounts or backend services. Use the site lawfully and do not try to damage it or interfere with other visitors' access.
Estimates, not advice
Generator and power station sizing results are estimates for planning. They are not electrical, installation or safety advice. Results depend on your inputs and the calculator's assumptions. Actual power use, startup demand, battery runtime and solar output can differ.
- Check appliance rating labels, equipment specifications and manufacturer instructions before buying or using equipment.
- Confirm continuous power, startup power, voltage and connection requirements. A calculated size does not guarantee compatibility.
- Fuel-burning generators can cause fatal carbon monoxide poisoning. Never run one indoors or in a garage. Follow manufacturer instructions for outdoor placement away from doors, windows and vents.
- Never feed generator power into a wall outlet. Backfeeding can endanger utility workers and other people.
- Have a licensed electrician assess connections to home wiring and the required transfer equipment.
Warranty and liability
We provide the site and its estimates as available. To the extent permitted by law, we do not guarantee their accuracy, completeness, uninterrupted availability or fitness for a particular purpose. This does not affect any guarantees or consumer rights that the law does not allow us to exclude.
To the extent permitted by law, we are not liable for indirect or consequential loss arising from your use of the site or its estimates. This exclusion does not apply to death or personal injury caused by our negligence, fraud, wilful misconduct, gross negligence or any other liability that cannot legally be excluded or limited. Nothing in these terms limits your mandatory consumer rights.
Third-party links
Links may take you to retailers and other websites. Those sites have their own terms and privacy policies. Check specifications, prices, warranties and return policies with the seller. A link does not guarantee a product's quality, safety or suitability.
Ads and affiliate links
Google AdSense ads and labeled affiliate links help pay for Blackout Calc. We may earn a commission when you buy through an affiliate link. See our affiliate disclosure and privacy policy for details.
Changes and governing law
We may change the site or these terms. Updated terms will appear on this page with a revised date.
Revised terms take effect when published on this page with a revised date. They apply to use of the site from that date and do not change rights arising from earlier use. We do not send individual notices because there are no accounts. Any notice or consent required by law still applies.
These terms are governed by Portuguese law. If you are a consumer, this does not deprive you of the mandatory protections of the law of the country where you live. You may bring proceedings in your local courts where applicable law allows.
Contact
Questions about these terms can be emailed to hello@blackoutcalc.com, or see the contact page.