Solar Sizing Guide - Free Bonus Resources

Interactive Solar Sizing Calculator

Every formula from the guide, built into an interactive tool. Enter your loads, location, and panel specs to see your system requirements update in real time.

Open the Solar Sizing Calculator

Recommended Equipment by System Size

These are the brands and products the DIY solar community actually buys and trusts. Organized by system size so you can find what fits your build.

Small Systems - RVs, Vans, Boats

Under 1 kW

Medium Systems - Cabins, Tiny Homes

1-3 kW

Large Systems - Whole Home

3+ kW

Where to Buy

Signature Solar - Best prices on EG4 and many brands, Texas-based
Current Connected - Wide selection, good customer support
Amazon - Convenience and easy returns for most components

Download Your Free Bonus Resources

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Solar System Planning Worksheet (printable PDF)
Seasonal Maintenance Schedule (printable PDF)
Common Mistakes Quick Reference Card

Get the Full Guide

The Solar Panel Sizing Guide walks you through every calculation step by step - 18 chapters, 100 pages, with worked examples for RV, cabin, and whole-home systems.

Available on Amazon

Available in Kindle, paperback, and hardcover

Solar Sizing Guide - Bonus Resources