Solar Electrical Load Offset Calculator

Estimate how much of your electricity bill solar panels can offset. Enter your usage and system details to compare sizes, calculate savings, and see how quickly the system pays for itself.

Electricity Usage

Monthly Usage (kWh)

Electricity Rate ($/kWh)

Solar System

System Size (kW)

Peak Sun Hours/Day

System Losses (%)

Net Metering

System Cost (edit to match local rates)

Cost per Watt ($)

Monthly Production

774 kWh

6 kW system

Offset

86%

of 900 kWh monthly usage

Annual Savings

$1,207.44

$100.62/month

ROI Payback

14.9 years

on $18,000.00 system

Purchase Option	Quantity	Est. Cost
6.0 kW (Current Size)	86% offset — $1,207.44/yr	$18,000.00
7.5 kW (+25%)Best value	108% offset — $1,404.00/yr	$22,500.00
9.0 kW (+50%)	129% offset — $1,404.00/yr	$27,000.00
12.0 kW (Double)	172% offset — $1,404.00/yr	$36,000.00

Recommended: 7.5 kW (+25%) ($22,500.00)This system size achieves 108% offset of your electricity usage, fully covering your 900 kWh monthly consumption. With annual savings of $1,404.00, payback is approximately 16 years.

This is an estimate only. Actual solar production depends on roof orientation, shading, weather patterns, panel efficiency, and inverter sizing. Net metering policies vary by utility. Always get quotes from licensed solar installers and verify utility policies before purchasing.