Location

System Config

Roof or ground space available for panels.
10 kW
Total DC size of the array - nameplate rating of all panels combined.
Angle from flat. Use roof pitch or ground-mount tilt.
Direction panels face. 180 = south, 90 = east, 270 = west.

Electricity Rate

What you actually pay per kWh on your bill, taxes and riders included.
Annual Production
--
kWh/yr
First-Year Savings
--
USD/yr
Simple Payback
--
years
25-Year Value
--
USD
Avg Monthly
--
kWh/mo
Capacity Factor
--
%
CO2 Offset
--
lb/yr

Monthly Production

Enter your location and system size to see results.

Solar vs. Grid - 25 Year Comparison

Add tilt, azimuth, and electricity rate for a better estimate.

Savings Projection

How It Works

Solar panels turn sunlight into direct current, and an inverter converts that to usable AC power for your farm. Production changes with seasons, weather, tilt, and how the panels are aimed. A bigger array does not always mean better - good siting and shading control matter just as much. Your savings depend on how much power you use on-site and your real electricity rate.

These tools are free forever. If they help you:

Frequently Asked Questions

How is annual production calculated?

The calculator uses NREL solar irradiance data for your location combined with the system size and orientation you enter. It applies standard derating factors for inverter losses, soiling, and temperature to produce a realistic annual kWh estimate.

What payback period should I expect on a farm?

Payback varies widely. With current incentives and typical utility rates, well-sited farm solar pays back in 7 to 12 years on average. Sites with high electric bills, expensive utility rates, or strong state incentives can be shorter; remote or shaded sites longer.

Does it account for federal tax credits?

Yes, the calculator can include the federal Investment Tax Credit and other incentives you choose to enter. Always confirm current credit rates with a tax professional - federal and state programs change.

Can I model battery storage?

The current version focuses on grid-tied solar without storage. Battery payback depends heavily on time-of-use rates and outage exposure, which need to be modeled separately.

Is this advice or an estimate?

It is an estimate based on public data. Get a real site assessment and at least two contractor quotes before committing money. Roof condition, shading, and electrical service can all change the math.

Want the full toolkit?

The Homestead Operating System - Free

Records, planning sheets, and barn-wall templates for running a small property without losing the thread. Built by the team behind Manley Farms - the same people behind this free tool.

Get The Homestead Operating System → See all 3 products