Wattcrunch Editorial Team
Solar research, calculation review, and source verification
Wattcrunch content is produced through a documented team process rather than attributed to an unverifiable expert persona. We translate primary energy data, utility rules, and tested calculation methods into practical guidance for US homeowners.
How our work is reviewed
Calculator formulas are unit tested. Policy claims are checked against government, utility, DSIRE, NREL, EIA, LBNL, IRS, or legislative sources where applicable. Articles include publication and modification dates, and material policy changes are updated across affected tools and guides.
Wattcrunch is an independent planning resource, not an installer, lender, utility, tax adviser, or government agency. Estimates should be confirmed with appropriately licensed local professionals before a purchase or tax decision.
Read our full methodology
See the source hierarchy, core assumptions, update cadence, correction process, and limitations behind Wattcrunch.
Methodology and editorial policyArticles by the team
- How Many Solar Panels Do I Need? A Simple 2026 Guide
A step-by-step guide to sizing a home solar system from your electricity bill, including a worked example and the role of sun hours.
Published 2026-01-15 · Reviewed 2026-06-15
- Solar Payback Period Explained (With Real Numbers)
What solar payback period means, how to calculate it, and the typical range for US homeowners now that the federal tax credit has ended.
Published 2026-02-10 · Reviewed 2026-06-15
- Time-of-Use Rates and Solar: What Changed and Why It Matters
TOU electricity rates are now the default for millions of US solar owners. Here is how they work, how they change solar economics, and when a battery actually pays off.
Published 2026-03-15 · Reviewed 2026-06-15
- Is Solar Still Worth It in 2026? The Honest Answer.
Is home solar still worth it after the federal credit ended? Compare 2026 costs, remaining incentives, electricity rates, savings, and payback factors.
Published 2026-04-01 · Reviewed 2026-06-15
- How to Compare Solar Quotes: The Only 5 Numbers That Matter
Most homeowners compare solar quotes wrong — focusing on monthly payment instead of total value. Here are the five numbers that actually determine which quote wins.
Published 2026-05-01 · Reviewed 2026-06-15
- How Much Home Battery Backup Do You Need?
Size home battery backup appliance by appliance using realistic wattage, daily energy, surge power, usable capacity, and outage runtime estimates.
Published 2026-05-15 · Reviewed 2026-06-15
- Solar Shading Loss: Trees, Roof Obstacles & Inverters
Learn how trees and roof obstacles reduce solar output, how to estimate shading loss, and when microinverters or power optimizers may help.
Published 2026-05-20 · Reviewed 2026-06-15
- Heat Pump + Solar: Sizing, Costs & Savings (2026)
Learn how to size solar for a heat pump replacing gas, oil, or propane heating, including climate, COP, electricity use, costs, and payback.
Published 2026-06-01 · Reviewed 2026-06-15
- How Long Do Solar Panels Last? Lifespan & Degradation
Solar panels commonly carry 25-year production warranties and may operate longer. See research on lifespan, degradation, failures, and replacement timing.
Published 2026-06-05 · Reviewed 2026-06-15
- Solar Panel Degradation Rate & 25-Year Savings
Solar panels lose output gradually over time. Here is exactly how degradation affects your 25-year savings projections and which panels degrade slowest.
Published 2026-06-08 · Reviewed 2026-06-15
- Community Solar vs Rooftop Solar: Which Is Right for You?
Compare community solar and rooftop solar on eligibility, upfront cost, bill savings, contracts, maintenance, risk, flexibility, and moving homes.
Published 2026-06-10 · Reviewed 2026-06-15
- Solar for Renters: 5 Options Without a Rooftop
You do not need to own a home to benefit from solar. Here are five real options for renters and apartment dwellers to reduce electricity bills with solar in 2026.
Published 2026-06-12 · Reviewed 2026-06-15
- Net Metering by State (2026): Export Credit Guide
Compare 2026 net metering and solar export-credit approaches by state, including full retail credit, net billing, and avoided-cost compensation.
Published 2026-06-15 · Reviewed 2026-06-15