Review an installer proposal
Start here when you already have one or more solar quotes. Check completeness first, then verify the specific claims that can materially change a comparison.
Solar Quote Review Tools
Follow one homeowner workflow from proposal checklist and PDF analysis through claim checks, side-by-side comparison, price context, financing review and homeowner quote data.
Open tool →Solar Quote Checklist
Review 21 system, production, pricing, financing, installation-scope, export-limit and contract fields before relying on an installer proposal.
Open tool →Solar Quote Analyzer
Upload a text-based installer proposal PDF or enter values manually, keep undetected fields blank, and review normalized price, production, equipment, financing and warranty references.
Open tool →Compare Solar Quotes
Upload two or three proposal PDFs and compare normalized $/W, production, financing, equipment, battery packages and Proposal Readiness without an automatic winner.
Open tool →Solar System Size Claim Checker
Verify proposal DC nameplate arithmetic by multiplying panel count by module wattage, including an optional second module group, and compare it with the quoted system size.
Open tool →Solar Production Claim Checker
Compare an installer's first-year annual kWh forecast with a ZIP-specific PVWatts planning reference using a confirmed DC system size, roof tilt and array direction.
Open tool →Compare Solar Production Claims
Compare two first-year production forecasts on one shared ZIP, tilt and direction reference using normalized kWh per installed kW.
Open tool →Solar Offset Claim Checker
Verify a stated annual solar offset from household kWh usage and first-year solar production while keeping energy offset separate from utility-bill savings.
Open tool →Solar DC/AC Ratio Checker
Compare total solar-module DC kW with combined inverter continuous AC kW and review nameplate sizing without turning the ratio into an automatic clipping-loss estimate.
Open tool →Solar Export Limit vs Inverter Checker
Compare combined solar-inverter continuous AC capacity with a utility or interconnection export cap, including zero-export cases, without inventing curtailed kWh.
Open tool →Solar Savings Claim Checker
Test an installer long-term savings story against a transparent no-solar utility baseline and compare different utility-rate escalation assumptions.
Open tool →Compare Solar Savings Claims
Compare two installer savings stories on the same current utility-bill baseline and surface horizon or escalation mismatches before treating headline dollar claims as equivalent.
Open tool →Size solar and model production
Use these tools when you are still estimating what may fit, how large the array should be, what it may produce and what a planning-level system could cost.
Solar Roof Analyzer
Analyze an address with Google Solar API building insights: panel fit, roof segments, modeled area and maximum reference production.
Open tool →Roof Solar Calculator
Estimate how many panels may fit from roof area, usable percentage, panel dimensions, wattage and orientation.
Open tool →Solar Panel Calculator
Estimate panel count from annual electricity use, target solar offset, panel wattage and local solar yield.
Open tool →Solar Panel Output Calculator
Estimate annual, monthly and daily solar production from state, panel wattage and panel count.
Open tool →Solar Panel Degradation Calculator
Model how an annual panel degradation assumption changes year-by-year production, retained output and cumulative kWh, with an optional second sensitivity scenario.
Open tool →System Size by Electric Bill
Convert an average monthly electric bill into an estimated annual kWh load, solar system size and panel count using state rate and solar-yield assumptions.
Open tool →Home Solar Calculator
Use ZIP-specific PVWatts production to estimate system size, panels, installed cost and long-term savings.
Open tool →Solar Cost Calculator
Explore system cost by kW size, cost per watt, state, panel power and battery add-on.
Open tool →Solar Payback Calculator
Model cumulative payback year by year with electricity-rate escalation and panel degradation assumptions.
Open tool →Compare financing and contract economics
Keep cash price, loan disclosures, third-party ownership and escalation assumptions separate so a low starting payment does not become the entire comparison.
Solar Financing Guide
Choose the right comparison framework for cash, solar loans, leases and PPAs before applying loan-specific metrics to the wrong contract type.
Open tool →Solar Loan Calculator
Compare cash price, financing markup, APR, monthly payment and total financing cost, then optionally model an early principal payment and illustrative re-amortization.
Open tool →Solar Lease & PPA Escalator Calculator
Model how a lease payment or PPA energy rate compounds under an annual escalator and compare it with the same starting price at 0% escalation.
Open tool →Solar PPA Rate Crossover Calculator
Compare a contractual PPA cents-per-kWh path with a utility-rate scenario you choose and see whether or when the PPA rate reaches that reference.
Open tool →Plan battery backup and resilience
Compare storage packages and test whether a battery configuration can support the loads, power and multi-day outage behavior that matter to your home.
Battery Backup Calculator
Estimate backup duration from daily backed-up energy use and published battery capacity.
Open tool →Home Battery Quote Checklist
Review 15 battery, power, installation-scope and warranty fields before comparing installer storage packages.
Open tool →Battery Quote Calculator
Normalize one installer battery-package total to quoted $/usable kWh and privately move the package into side-by-side comparison or resilience testing.
Open tool →Compare Battery Quotes
Compare two or three battery packages by quoted price, usable storage, $/usable kWh and scope, then identify missing comparison data without an automatic winner.
Open tool →Solar Battery Backup Runtime
Model outage runtime, starting SOC, continuous-power fit, motor-start surge, pre-solar survival, load shedding, recharge-window limits and multi-day resilience.
Open tool →3-Day Solar Battery Outage Calculator
Run a 72-hour resilience simulation, compare supported battery configurations and test SOC floor, circuit shedding, recharge windows and quote-based economics.
Open tool →Plan solar for an EV or heat pump
Account for large new household loads before finalizing solar size so today's electric bill does not understate tomorrow's electricity use.
Solar + EV Calculator
Estimate EV charging kWh and the additional solar capacity needed to offset annual driving.
Open tool →Solar + Heat Pump Calculator
Convert current heating-fuel use into heat-pump electricity and estimate the extra solar capacity needed.
Open tool →