Energy & Home Cost Calculators — Solar, EV, Windows & More

Energy upgrades are the highest-stakes quotes in home improvement — $12,000–25,000 solar and window projects where sales tactics thrive on the buyer not knowing the math. These calculators put the numbers in your hands first. The solar calculator works from $2.50–3.50 per watt installed, subtracts the 30% federal ITC and any state incentive, and shows net out-of-pocket plus the 25-year amortized figure — a 6 kW mid-grade system lands at $18,000 gross, $12,600 net. The EV charger calculator prices Level 1/2/DC-fast separately and makes the two expensive branches explicit: panel upgrade (+$1,500) and the 240V circuit run that detours through finished walls. The window calculator itemizes materials from installation labor across vinyl, wood, aluminum and fiberglass, with single/double/triple pane as a 0.8/1.0/1.4 factor — so the triple-pane upsell shows up as a real number instead of a vibe. The pattern across all three: know the band, know the incentive, and make the salesperson's number justify itself against yours. Then check the payback and repair-vs-replace guides before signing anything.