Solar PV System Sizing Calculator – Excel Tool for DIY & Small Projects

Design your own solar power system in minutes—no engineering degree needed!

This easy-to-use Excel calculator helps you size both off-grid and on-grid solar PV systems with just a few inputs. Whether you're a DIY solar enthusiast, a student, or a beginner installer, this tool gives you a solid starting point for your solar setup.

✅ Features:

• ⚡ Dual-mode support: Off-grid & On-grid system sizing
• 📊 Monthly consumption input for accurate energy estimation
• 🧮 Automatic load calculation based on appliances
• ☀️ Solar panel and inverter matching for proper component selection
• 🧰 Built in Microsoft Excel – fully editable & customizable
• 🔌 Designed for small homes, cabins, and residential use

🧠 Who is it for?

• 🏡 Homeowners wanting to DIY a solar solution
• 🛠 Solar hobbyists and tinkerers
• 📚 Students and entry-level engineers
• 🌱 Sustainability advocates planning their first solar setup

📦 What You’ll Get:

• ✅ 1 Excel File (.xlsx) – fully functional, no macros
• 📘 Simple guide embedded in-sheet

📝 Notes:

This tool is for preliminary sizing and planning. It doesn't replace a full electrical design or site inspection, but it’s a great way to get accurate component estimates fast.