Open-Source Design Tools

Calculate. Design.
Grow & Power Sustainably.

Six purpose-built calculators for greenhouse heating, solar power, rainwater harvesting, wind energy, grow lighting, and backup power — from initial design through financial payback.

Greenhouse
🍃

Climate Battery Calculator

Design underground heat exchange systems that store summer solar energy in the soil to provide frost-free winters for your greenhouse — passively.

  • Greenhouse volume from box, hoop, or gable roof sections
  • Fan sizing and air exchange rate calculations
  • ADS tubing layout with rib spacing lookup
  • Hardware cost breakdown and payback period
  • Heat loss/gain analysis with climate map auto-fill
  • 70+ North American climate stations
Solar PV

Solar PV Calculator

Size a solar photovoltaic system for your home, farm, or greenhouse. Calculate array size, battery storage, costs, incentives, and 25-year financial returns.

  • Array sizing from energy usage and local solar resource
  • Grid-tied, off-grid, and hybrid system modes
  • Battery storage sizing (LFP, AGM, flooded lead-acid)
  • Federal ITC (30%) and state incentive calculations
  • 25-year financial returns with escalation modeling
  • CO₂ offset and environmental impact metrics
Water
💧

Rainwater Harvesting Calculator

Size catchment areas, storage tanks, and irrigation supply for your greenhouse or property using local rainfall data.

  • Catchment area with runoff coefficient by roof type
  • Storage tank sizing for desired days of supply
  • Greenhouse irrigation demand by crop type
  • Annual harvest vs. demand comparison
  • Cost analysis and municipal water savings
Wind
💨

Wind Energy Calculator

Size wind turbines for your site, estimate annual output using local wind resources, and calculate financial returns.

  • Hub height wind speed with shear formula
  • Annual output using Rayleigh distribution
  • Capacity factor and homes powered
  • Federal ITC and full cost breakdown
  • 20-year financial returns with CO₂ offset
Lighting
🌿

Grow Light Calculator

Size supplemental and full-cycle grow lighting by crop DLI requirements, fixture efficacy, and energy cost.

  • DLI targets by crop type (greens to high-light)
  • PPFD and fixture count from grow area
  • LED, HPS, CMH, T5 efficacy comparison
  • Annual energy use and electricity cost
  • Supplemental vs. full-cycle mode savings
Backup

Generator Backup Sizing

Size backup generators for critical farm and greenhouse loads, calculate fuel consumption, runtime, and operating costs.

  • Critical load list with surge factor
  • Battery bank integration for shortfall coverage
  • Recommended generator size (next standard kW)
  • Fuel consumption for gas, propane, diesel
  • Runtime on hand, cost per hour and per month

How These Tools Work Together

🌎

Pick Your Location

Most calculators use an interactive map to auto-fill climate data — solar resource, degree days, rainfall, wind speeds — tailored to your site.

📈

Live Results

Every field updates instantly as you type. No forms to submit — watch costs and outputs change in real time as you refine your design.

Design Confidence

Built on NREL solar data, EPA emissions factors, and published agronomic research — field-tested formulas you can trust for real design decisions.

🌿

Open Source

Built and maintained by FarmTracker Design Group. Share your numbers, provide feedback, and discuss findings to advance sustainable growing.

Coming Soon

Meet FarmTracker — Your Farm, All in One Place

The sustainable energy tools above help you design better growing systems. FarmTracker is what you use once they're built — a full farm management platform for tracking everything that happens on your land, from a single raised bed to a thousand-acre operation.

🌿

Backyard to Large-Scale Ag

Whether you're managing a backyard homestead or coordinating field crews across hundreds of acres, FarmTracker scales with you — same platform, no switching tools as you grow.

📈

Track What Matters

Animals, crops, equipment, harvests, inputs, expenses, and field observations — logged in one place with GPS mapping, calendar scheduling, and real-time dashboards.

Fully Customizable

Every farm is different. FarmTracker lets you define your own record types, fields, tags, and workflows so the system fits how you actually work — not the other way around.

Visit FarmTracker.farm →