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© 2026 Solrova, Inc. · Estimates only. Solrova is not a licensed contractor or financial advisor. · Terms · Privacy · Accessibility · Do Not Sell
What’s your typical electric bill?
A kilowatt-hour (kWh) is the unit your power company measures and charges you for. It is the number your bill counts.
Pick your rate plan
So we can use your actual rate instead of a regional average.
Your Solar Savings Estimate
kWh means kilowatt-hours. It is the unit of electricity your utility bill counts. Here it shows how much electricity the panels could produce.
Estimates based on NREL PVWatts solar irradiance data, EIA state residential rate averages, and LBNL cash installed-cost data (before loan dealer fees). Actual results will vary. Methodology & Terms
Design Your System
Monthly Usage vs. Solar Production
Where the solid production line sits above the dashed usage line, solar covers your full usage that month. Where usage sits above production, you draw some power from the grid. Based on regional climate estimates.
Solrova is not a lender. The costs shown here are illustrative estimates based on market averages, not a quote or an offer of credit. Your actual price and any financing terms (APR, monthly payment, fees) are set and disclosed by your Solar Partner before you sign.
What You Save Over 25 Years
Production based on satellite analysis of your roof
Good to Know
Things your Solar Partner should know about your home. Review before getting quotes.
"Offset %" is the number most installers lead with. It sounds meaningful, but it shifts every time your usage shifts. Buy an EV next year and your "85% offset" quietly becomes 60%, without anyone telling you.
Kilowatt-hours are different. They're the unit your utility actually measures and bills you in. A kWh produced today is a kWh on your bill, regardless of what changes in your life.
That's why every number in this estimate is anchored in kWh. Production, savings, payback, all of it traces back to the unit on your bill that doesn't move.
How we calculated this
Every number comes from public government and industry data sources. We'll show you exactly which ones, so you can verify any line of math yourself.
- Production NREL PVWatts v8 + Google Solar API: per-panel sunlight modeling from satellite imagery, backed by NREL's National Solar Radiation Database (NSRDB) typical-meteorological-year data for your location.
- Model inputs We run PVWatts with 14% system losses (the NREL default, covering soiling, wiring, inverter and mismatch losses), a fixed roof mount, and a premium module type. Tilt and azimuth come from the roof segments Google Solar returns for your address, not from a regional assumption.
- Panel spec We size every design with a 400 watt module, the residential volume standard today (Tier 1 panels run 380 to 430 watts). Your installed panel may differ, and your Solar Partner confirms the exact model on site.
- Utility rate EIA 2024 residential average for your state: ¢/kWh. Enter or upload your bill to replace this with your actual rate.
- Your usage When you give us a dollar amount, we divide the whole bill by your rate to reach kWh. Most bills also carry a fixed monthly service charge that buys no electricity, so a dollar-based estimate runs a little high. Entering your kWh for 12 months replaces the estimate with your metered usage and removes that effect.
- Rate escalation 2.6% per year · EIA national long-term average (Form 861). We use the long-term number on purpose: a conservative projection means we won’t oversell your savings.
- Degradation 0.5% per year gradual output loss as panels age · NREL industry standard. After 25 years your system still produces ~88% of what it does today.
- System cost your state’s cash price per watt, before loan dealer fees (U.S. average about $3.32/W), from Lawrence Berkeley National Laboratory’s Tracking the Sun (2024 Edition; host-owned, PV-only residential, about the 25th percentile). Reported prices range widely, roughly $3.00 to $5.20 per watt, and loan-financed systems run higher because dealer fees of 5 to 50 percent are commonly baked into the financed price (CFPB, 2024).
- Third-party rates Regional lease and PPA rate ranges are marketplace estimates compiled from provider filings, not a government dataset and not a quote. Your provider sets the actual rate, and most contracts rise about 2% per year.
- Federal credit 25D expired Dec 31, 2025 for purchased systems. For third-party-owned systems (lease and PPA), the provider may qualify for the 48E credit. For solar projects whose construction begins after July 4, 2026, the provider generally must place the system in service by Dec 31, 2027 and meet the credit’s other requirements.
- Battery storage Battery cost is shown as a separate line item, not folded into solar savings. A battery is a resilience purchase (blackout backup, time-of-use shifting, self-consumption), not a utility-savings vehicle. Mixing the two would misrepresent both products and produce misleading negative “savings” numbers.
- Environmental impact Your CO2 avoided uses your grid’s carbon intensity from EPA eGRID (U.S. average output rate about 386 kg CO2 per MWh, ~0.85 lb per kWh). The “equal to X trees / Y cars” lines are illustrative equivalents: a typical passenger vehicle emits about 4.6 metric tons CO2 per year (EPA), and a mature tree absorbs roughly 48 lbs CO2 per year (standard forestry estimate).
Your emailed estimate lists the same sources so you can verify every line of math.
Ready to take the next step?
Get your report, then connect with a vetted Solar Partner in your area. No obligation, no pressure.
Email me a copy of this estimate
We’ll send your savings recap to your inbox. No phone, no sales calls.
Full methodology, assumptions & legal disclosures
All figures shown are estimates only and do not constitute a guarantee of savings, production, or pricing. Est. Annual Production is calculated at the individual panel level using Google's Solar API (satellite imagery + per-panel sunlight modeling) and, when Solar API data is unavailable, NREL PVWatts v8 irradiance data for your region. Est. Annual Savings multiply that production estimate by your utility rate (either parsed from the bill you uploaded or the EIA 2024 residential average for your state). Both figures assume a 0.5%/yr panel degradation curve over 25 years. Utility rate sourced from EIA 2025 Arizona residential average. System cost reflects the cash purchase price per watt before loan dealer fees (host-owned, PV-only residential, about the 25th percentile) for your state from Lawrence Berkeley National Laboratory, Tracking the Sun (2024 Edition; U.S. about $3.32/W), and may vary significantly by provider, location, and system configuration. Loan-financed systems run higher because dealer fees of 5 to 50 percent are commonly baked into the financed price (CFPB, 2024); LBNL’s all-in median including financed systems is about $4 per watt. The 30% federal residential ITC (Section 25D) expired Dec 31, 2025, so purchased-system figures reflect no federal credit. Lease and PPA rate ranges shown are marketplace estimates; actual rates vary by provider, credit qualification, and location. Section 48E availability is not guaranteed and depends on provider eligibility. For solar projects whose construction begins after July 4, 2026, current law generally requires the system to be placed in service by Dec 31, 2027. Other eligibility restrictions also apply. Battery storage costs are manufacturer estimates and do not include potential permitting, electrical upgrade, or interconnection fees. Actual savings depend on roof condition, shading, utility rate changes, equipment performance, and provider pricing. Solrova is not a licensed contractor, financial advisor, or energy provider. This tool is for informational and educational purposes only. Consult a licensed solar professional for a binding proposal.
Solar covers $1,250 of your electricity in Year 1
Every figure below traces back to kWh, the unit on your bill.
Watch your Solar Story →
A 70-second animated walkthrough of your next 25 years, built live from the numbers above. Compare side-by-side: with solar vs. no solar.
What happens next
We review your request
A real review. We check your area for a vetted Solar Partner who fits your project. We’re building our Solar Partner network market by market, and your request holds its place. You’ll get an email introduction when we match you. They’ll have your report, so the conversation starts with your numbers, not a generic pitch.
If you decide to move forward
Any agreement covers system size, equipment, and pricing, and is between you and your Solar Partner. Solrova is not a party to it. Most agreements include a cooling-off window so you can change your mind.
A site visit confirms the design
Your Solar Partner schedules an engineering review to confirm roof condition, electrical panel, and final layout. Permits and installation follow.
You set the pace
Your analysis stays here as long as you need it. No deadline, no pressure. Comparing multiple quotes is encouraged. It’s your home.
Your Electricity Rate Over 25 Years
Based on your current rate and a 2.6% annual increase (EIA historical average, 2010–2024).
About Kilowatt-Hours vs. Offset Percentage
Offset % sounds meaningful, but it changes with your behavior. If you buy an EV next year, your 85% offset becomes 60%, and the solar rep never told you that. Kilowatt-hours are what your utility bill actually measures. It doesn't shift.
That's why we show you kWh. It's the number on your bill that never lies.