Clicky

Solar System Estimator Calculator

Solar System Power Calculator

Calculate every watt BEFORE you build your freedom.

Enter your appliances and usage to get precise solar system recommendations. Based on real-world installations that actually work - no guesswork, no failures.

Device Qty Hours/Day Watts Each Total Wh/Day Notes
LED Light Bulb 250 Essential lighting throughout home
Ceiling Fan 1120 Great for air circulation, low impact load
Refrigerator (Energy Star) 1200 Runs intermittently; 8hrs represents duty cycle
Laptop 720 Includes occasional charging load
Internet Router 360 Often overlooked—small but constant load
Washing Machine 500 Only during usage days; factor in well pump if needed
Microwave 500 Short bursts, but high draw when active
Coffee Maker 450 Plan for the morning power punch
TV (LED, 42") 800 More hours = more kWh
CPAP Machine 0 Must run overnight—reliable power is essential
Water Pump (Well, 1/2 HP) 2000 High draw; needs surge capacity too
Chest Freezer 1600 Critical for off-grid food storage
Power Tools 0 Expect spikes and short bursts
Window A/C (small) 0 Major draw in hot climates

Your Power Requirements

Total Daily Usage
9.50 kWh
+ 25% Safety Buffer
11.88 kWh
Peak Power Demand
1000 watts

Complete System Recommendations

☀️ Solar Panel Array

2.97 kW System
Recommended: 8 × 400W panels
Made in America Option: Mission Solar panels (Texas)
Accounts for 5 peak sun hours & 80% system efficiency

🔋 Battery Bank

35.64 kWh Capacity
Recommended: 30 × 100Ah LiFePO4 (12V)
Made in America: Battleborn or RELiON batteries
Provides 3 days backup power - critical during storms

⚡ Inverter

3000W Pure Sine Wave
Minimum: 2000W
Made in America: Aims Power or Go Power!
Handles peak loads + 25% surge capacity - no more shutdowns

🎛️ Charge Controller

155A MPPT Controller
Recommended: 80A for future expansion
Made in America: MidNite Solar controllers
Optimizes solar panel charging efficiency

🔌 System Voltage & Wiring

48V System Recommended
DC Wire Size: 1/0 AWG for main runs
Made in America: Southwire copper wire
48V prevents costly rewiring nightmares

💰 Investment Summary

System Size: 2.97 kW
Daily Power: 11.88 kWh
Professional-grade components: Built to last 25+ years
Complete off-grid independence that actually works