Solar System Calculator Pro

Size an off-grid solar power system in minutes and send your customer a professional proposal PDF.

Solar System Calculator Pro is built for electricians, solar installers and anyone planning a system for a cabin, RV, farmhouse or remote site. Add your devices and get panels, batteries, hybrid inverter, cable sizes, protection and cost.

ADD YOUR DEVICES
• Ready-made templates: fridge, chest freezer, water pump, TV, router, security camera and more
• Enter the yearly consumption from the energy label (kWh/year)
• Daily consumption and peak load are calculated instantly

SYSTEM SIZING
• Number and rating of panels, battery capacity and series/parallel layout
• Hybrid inverter with built-in MPPT
• Days of autonomy, depth of discharge (DoD), temperature and system losses
• 20 country/region profiles: currency, grid voltage, peak sun hours and electrical codes

INSTALLATION & CABLE SIZING
• Wire size and voltage drop for PV–inverter, battery–inverter and inverter–panel runs
• DC isolator, surge protection, fuse and RCD/GFCI recommendations
• String voltage and cold-weather open-circuit check from the panel label
• Material list and installation cost
• Metric (mm²) or AWG / feet

PAYBACK ANALYSIS
• Payback period compared with a diesel generator and with the grid
• Net present value, internal rate of return and a 25-year cash flow chart
• Battery and inverter replacement costs included

PROPOSAL PDF IN ONE TAP
• Cover, system summary, device list, installation and payback pages
• A3 single-line diagram with IEC symbols
• Your company details, customer name, quote number and tax option
• Saved to the Files app; email it or print it

WITH PRO
• No ads
• Unlimited projects
• Every section always unlocked

16 languages, dark mode, larger text option, and support for iPhone, iPad and Mac.

Note: Results are a preliminary sizing. The final installation design should be approved by a licensed electrical engineer.

Support: support@3dscada.com