Best Estimating Software for Solar & PV Contractors (2026)

# Best Estimating Software for Solar & PV Contractors (2026)

The solar industry is booming thanks to the Inflation Reduction Act (IRA) extending the Investment Tax Credit (ITC) through 2034. But solar estimating is more than panel count × price — it involves roof analysis, inverter sizing, balance-of-system (BOS) components, interconnection fees, and incentive calculations.

What Makes Solar Estimating Unique

Panel layout optimization — Roof orientation, tilt, shading (trees, neighboring structures), and setback requirements determine how many panels fit and how much energy they produce.

Inverter sizing & stringing — String inverters vs. microinverters vs. optimizers each have different cost structures and labor requirements.

BOS costs — Racking, conduit, wire, disconnects, monitoring, and rapid-shutdown devices represent 40–60 % of system cost beyond the panels themselves.

Incentive stacking — Federal ITC (30 %), state rebates, SREC values, and utility incentives vary by location. Good estimating software calculates net cost after incentives.

Battery storage add-ons — Tesla Powerwall, Enphase IQ, and other BESS products are increasingly bundled. Estimating must handle DC-coupled vs. AC-coupled configurations.

How OneEstimate.ai Serves Solar Contractors

OneEstimate.ai includes solar-specific features:

Panel + inverter calculator — Input system size (kW), select panel wattage and inverter type, and the AI calculates panel count, string configuration, and BOS components.
Incentive engine — Auto-applies federal ITC, state rebates, and utility incentives based on project zip code.
Battery storage templates — Add ESS (Energy Storage System) with capacity, inverter, and installation labor.
Roof-mount vs. ground-mount — Separate racking and labor templates for each mounting type.
Commercial solar — Handles prevailing-wage, Davis-Bacon, and MACRS depreciation calculations for commercial/utility-scale projects.

Pricing: Free (unlimited) → PRO $49/mo → BUSINESS $99/mo + $15/user.

👉 Start your free solar estimate

Frequently Asked Questions

Can OneEstimate.ai calculate the federal solar tax credit?

Yes. The incentive engine auto-applies the 30 % ITC (and the 10 % domestic-content adder if applicable) based on project details.

Does the software handle battery storage estimates?

Yes — add Tesla Powerwall, Enphase IQ, or generic BESS templates with capacity, inverter, and installation costs.

Is OneEstimate.ai free for solar contractors?

Yes — the Free plan is unlimited. PRO ($49/mo) adds branded proposals, cost trending, and client portals.

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