Coverage Goal
Whole house means your AC, all appliances, and everything runs on solar — including during an outage. Half house is the typical sales pitch: a few circuits, maybe one fridge, no AC.
Most solar companies default to half-house coverage. Kevin's system is whole-house — that's the difference.
Whole-house sizing targets 100% of your estimated daily usage — AC, full appliance load, and overnight battery charging included. Typical sales quotes only cover 50–70% of usage, so this may read larger than a first quote. That's the honest version.
Your Home
Home Size
Larger homes use more energy. Texas average is around 2,000 sq ft.
2,000 sq ft
800 sq ft5,000 sq ft
Current Monthly Electric Bill
Your actual bill is the most accurate input we have. Texas average is $168–177/mo. Kevin's was $450/mo before solar — large home, hard-running AC. Leave at $0 if unknown and we'll estimate from home size.
$175/mo
$0 (unknown)$800/mo(TX avg: ~$175)
Battery Backup
Kevin has 2× Tesla Powerwalls. During Hurricane Beryl, his family ran the whole house for 5 days while neighbors were dark. Battery backup is the difference between solar and solar + resilience.
Days of backup needed
Hurricane Beryl knocked out power for 5 days in Houston. Kevin recommends sizing for at least 2 days of essential loads. 1 Powerwall = ~1 day for a typical Texas home.
2 days
1 day5 days
Check everything you want solar to power. The calculator uses these to estimate your daily load. Your monthly bill (above) takes priority if entered.
Texas Home Solar Power Calculator
3AT Ascendent · 3atascendent.com — Estimate generated