Design your off-grid solar system with confidence.
Simplified engineering tools to help you design a reliable off-grid solar system — without the guesswork.
Simplified engineering tools for going off-grid
Practical tools built to take the guesswork out of off-grid solar — from sizing a complete system to choosing the right portable power station.
Off-Grid System Designer
Size your solar array, battery bank, inverter and charge controller with engineering-based calculations and compatible equipment recommendations.
Power Station Estimator
Find the portable power station capacity that fits your needs based on the devices and appliances you want to run.
Learn Off-Grid Solar
Practical guides that explain solar, batteries, inverters, system sizing, and off-grid design without the unnecessary complexity.
Learn the why behind the design
Straightforward guides to help you understand the decisions behind a reliable off-grid system.
Size Your Off-Grid Battery Bank
Learn how daily energy use, autonomy and battery capacity come together to determine the right battery-bank size.
How to Size Your Solar System Inverter
Understand how your loads determine inverter size and why peak demand matters when choosing an inverter.
Series vs. Parallel
Understand series and parallel connections and how they affect voltage, current and your off-grid system design..
BUILT BY AN ELECTRICAL ENGINEER
Solar guidance grounded in real engineering
Evergreen Off-Grid was created by Jon Springer, PE, to make solar design easier to understand without watering down the engineering behind it.
The goal is simple: give DIYers practical tools and straightforward guidance to help them make better decisions about solar, batteries, inverters and backup power.
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