| What it does | Independent guide to home backup power with sizing calculator, cost data, and brand comparisons
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| Based in | US
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| Pricing model | Free
| Free
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| Pricing | Not given
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| Key features | - Generator size calculator that determines running watts and starting surge from appliance list
- 62 appliances in wattage database
- Installed cost ranges for whole house and portable setups
- Fuel type comparison and tank sizing guidance
- Published manufacturer specification data
- Transfer switch installation and setup guidance
| - Bra size calculation in five sizing systems: US, UK, EU, FR and AU
- Support for inches and centimetres
- Fabric yardage calculator for various projects
- Pregnancy due date calculator using Naegele's rule
- All calculations run privately in browser with no data storage
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| What makes it different | - No brand sponsorships; independent research that takes no brand money
- Published data sources with every guide; cites specifications and affiliate commission model
- Calculator automates load math with running watts, starting surge, altitude, and safety margin
- Tracks real installed cost ranges rather than list prices
- Free tool that costs nothing to use
| - All 26 calculators completely free with no sign-up or limits
- Calculations verified with automated tests before every release
- Fully private with no measurements sent to servers or stored
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| Community votes | 0 | 0 |
| DR (Domain Rating by Ahrefs) | 6 ▲ +1 (up) since last check | 3 ● no change since last check |
| Trust Flow (Majestic) | 8 | 0 |
| Citation Flow (Majestic) | 30 | 0 |
| Referring domains (Majestic) | 71 | 0 |