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Solar Panels for a 1,800 Sq Ft Home

Estimate panels, system size, and savings for your home size

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A 1,800-square-foot home typically uses between 1,000 and 1,500 kWh of electricity per month, depending on climate zone, insulation quality, and whether you heat with gas or electricity. A solar system sized to that load can cover most or all of your utility bill — and in states with net metering, any excess production earns you credits. We've pre-loaded the numbers for a 1,800 sq ft home so you can see a realistic estimate in seconds.

1,800 sq ft

Home Size

15–19

Typical Panels

6–8 kW

Typical System

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Solar Panels for 1,800 Sq Ft — FAQ

How many solar panels does the average home need?▾
Most US homes need between 15 and 30 panels (6–12 kW system). The exact number depends on your electricity usage, your state's sun hours, roof orientation, and the wattage of the panels you choose. Enter your bill or usage above to get a personalized estimate.
Does roof orientation affect how much power solar panels produce?▾
Yes, significantly. South-facing roofs receive the most direct sunlight and are ideal (factor: 1.00). East and west-facing roofs produce about 15% less. North-facing roofs produce roughly 30% less. Flat roofs can be angled for optimal output.
Should I buy or lease solar panels?▾
Buying outright (or with a solar loan) delivers the best long-term value because you own the system and claim the 30% ITC yourself. Solar leases and PPAs require no upfront cost but typically provide smaller monthly savings, no tax credit, and can complicate home sales. If you can afford to buy (including via a solar loan), ownership almost always wins financially.
How much CO₂ does a solar system offset?▾
The EPA estimates that the average US grid emits 0.855 lbs of CO₂ per kWh. A 10 kW solar system producing 14,000 kWh/year offsets about 11,970 lbs (5.4 metric tons) of CO₂ annually — equivalent to planting 88 trees or driving 12,000 fewer miles. Over 25 years, that's 300+ metric tons.
Should I add battery storage to my solar system?▾
Battery storage (like the Tesla Powerwall or Enphase IQ Battery) costs an additional $10,000–$15,000 per battery. It makes sense if: (1) you're in a state with unfavorable net metering (like California's NEM 3.0), (2) you experience frequent outages, or (3) you want to maximize self-consumption. For most homeowners with standard net metering, batteries don't improve payback period.

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Disclaimer: Estimates based on typical electricity consumption for a 1,800 sq ft home using NREL sun hour data and EIA rate averages. Actual results vary. Not financial advice.