Power Estimator vs Easy Solar Sizer

Power Estimator is the essential tool for planning and monitoring off-grid power systems. Whether you're designing a solar installation, managing an RV setup, or maintaining a remote cabin, this calculator provides accurate battery charge predictions based on your specific configuration. Key Features: • Solar Power Optimization - Configure panels with efficiency factors, shading, and real-time weather integration • Real Weather Data - NOAA integration provides accurate solar generation based on your location's sunrise, sunset, and cloud cover • Battery Management - Track charge levels over time with percentage, watt-hour, and voltage display modes • Load Scheduling - Set up primary loads and additional devices with custom time schedules • Multi-Source Power - Include generators and other power inputs in your calculations • Interactive Charts - Visualize battery levels, solar generation, consumption, and weather conditions • Multi-Day Forecasting - Plan ahead with calculations spanning days or weeks • Location Flexibility - Use GPS or enter custom locations for weather-accurate results Perfect for solar installers, RV enthusiasts, off-grid homeowners, and anyone planning power-independent systems. Get precise estimates to ensure your batteries never run out when you need them most.

SolarSize helps you estimate the solar panels, inverter and battery you may need for water pumps, farms, container homes, rural houses, small shops and security cameras. Choose your location and use case, get simple offline results, panel direction, tilt guidance and clear safety warnings. No login, no subscription, no internet needed.