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Massachusetts Solar Panel Calculator

Local rates, sun hours & savings — specific to Massachusetts

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3.84

Peak Sun Hrs/Day

$0.292

Avg Rate ($/kWh)

$167

Avg Monthly Bill

9 yrs

Est. Payback

Massachusetts has the highest electricity rates in the continental US at $0.29/kWh, which is the primary reason it consistently ranks among the top states for solar ROI despite getting only 3.84 peak sun hours per day. The SMART program (Solar Massachusetts Renewable Target) adds a fixed per-kWh incentive for 10 years on top of electricity savings. This calculator models Massachusetts rates and sun hours — high rates mean every kWh your panels produce is worth more.

3.84 hrs

Sun Hours/Day

$0.292

Rate ($/kWh)

$2.95

Avg Cost/Watt

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Solar Data for Massachusetts

Peak Sun Hours
3.84 hrs/day (NREL annual avg)
Avg Electricity Rate
$0.2922/kWh (EIA 2024)
Avg Monthly Bill
$167/month
Avg Install Cost
$2.95/W (LBNL Tracking the Sun)
Est. Payback (avg bill)
9 years (before 30% ITC)
Federal ITC
30% through 2032

Solar Panels in Massachusetts — Frequently Asked Questions

Can solar panels completely eliminate my electricity bill?▾
A properly sized solar system can offset 90–100% of your annual electricity use, but you'll likely still have a small monthly connection fee ($10–$20) to stay connected to the grid. If you add battery storage, you can further reduce grid dependency. Net metering allows excess daytime production to offset nighttime usage in many states.
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.
Can my HOA prevent me from installing solar panels?▾
In most states, no. Over 25 states have solar access laws that limit or prohibit HOA solar restrictions. California, Florida, Texas, Colorado, and New York all have strong protections. Your HOA can still regulate aesthetics (panel placement, color of conduit), but cannot block installation outright. Check your state's laws at dsireusa.org.
How much does a solar system cost installed?▾
Installed solar costs range from $2.50 to $3.50 per watt depending on your state, system size, panel brand, and installer. A 10 kW system runs $25,000–$35,000 before incentives. After the 30% federal ITC, that's $17,500–$24,500. Many states offer additional rebates that can reduce costs further. Get 3 quotes to find competitive local pricing.
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.

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Solar Savings on a $100/Month Bill

How much solar saves on a $100 monthly electricity bill in Massachusetts

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Solar Savings on a $150/Month Bill

How much solar saves on a $150 monthly electricity bill in Massachusetts

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Solar for 1,000 Sq Ft Homes

How many panels does a 1,000 sq ft home need?

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How many panels does a 1,800 sq ft home need?

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6 kW Solar System

Full cost and savings breakdown for a 6 kW installation

Disclaimer: Data sources: NREL PVWatts (sun hours), EIA 2024 Residential Rate Survey (electricity rates), Lawrence Berkeley National Lab Tracking the Sun (install costs). Estimates are for planning only. Actual savings depend on your specific roof, shading, utility policies, and available incentives. Not financial or tax advice.