Professional Off-Grid Energy System Design
Design Your Commercial Off-Grid Energy System
Calculate solar production, size battery systems, and optimize your energy independence with precision 8760-hour analysis
Start Calculating NowSimple 5-Step Process
From project setup to system optimization in minutes
1
Project Info
Enter location and property details
2
Energy Usage
Define your load profile
3
Solar System
Configure solar production
4
Analysis
Size battery and generator systems
5
Results
View comprehensive calculations
Powerful Features
Everything you need to design and optimize your off-grid energy system
Location-Based Analysis
Enter your address for accurate solar production calculations based on your location and roof orientation
Smart Load Profiling
Build detailed energy usage profiles using archetypes, appliances, and seasonal patterns for precise calculations
Advanced Solar Modeling
Calculate solar production using PVWatts API or simple methods, with support for multiple roof facets
Battery System Sizing
Get intelligent product recommendations based on your solar surplus and energy needs
8760-Hour Analysis
Comprehensive year-round analysis showing solar surplus, battery charging potential, and system performance
Generator Integration
Model backup generators with auto-start/stop controls and battery charging capabilities
How PAX Energy Calculator Helps You
Accurate 8760-hour analysis for year-round system performance
Intelligent battery sizing based on solar surplus calculations
PVWatts API integration for precise solar production modeling
Flexible load profiling with archetypes and appliance scheduling
Generator modeling with auto-start/stop controls
State-based solar production factors for location accuracy
Get Started Today
Sign in to start designing your off-grid energy system. All calculations require an account.