Electricity Cost Calculator
Adjust the calculator below to see your projected future electricity costs.
Used to estimate average electric rate for the solar and lease snapshots.
Use your most recent bill or the average of your last 3 bills.
30 years is a common planning horizon, but you can adjust.
Many New England homeowners use 3–6% based on recent history.
Projected Utility Spend
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Over 30 Years
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Year 30 Annual Cost
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This is an estimate based on your inputs. Actual utility rates may be higher or lower over time.
Solar Ownership Estimate
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Ballpark installed cost range for ownership (not a quote)
Estimated System Size
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Estimated Annual Usage
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Disclaimer: Non-binding, educational estimate only. Uses regional averages and typical production/cost ranges. Final system size and pricing depend on roof layout, shading, electrical work, permitting, equipment selection, and site conditions.
Solar Lease Payment Estimate
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Estimated monthly payment range: $0.16–$0.24 per kWh (illustrative)
Disclaimer: Illustrative estimate only. Lease pricing varies by provider, term length, escalators, credit, and home details. This does not include fees, adders, or contract terms.
Stay Ahead of the Next Rate Change
Eversource and RI Energy rates are typically adjusted every six months. Check the countdown timer to see how far away we are from the next rate change.
Upcoming Eversource Rate Change
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Upcoming RI Energy Rate Change
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How Do Electric Rates Change?
Across New England, regulated electric utilities must file formal requests with their state’s utility commission before any rate adjustment can take effect. These filings undergo a review process where regulators evaluate the utility’s costs, proposed investments, and projected revenues before issuing an order that approves, modifies, or rejects the request.
For residential and small-business customers on default supply rates, most New England states update these rates on a six-month cycle. For example, in Rhode Island, Last Resort Service rates are reviewed and set for two seasonal periods each year. Massachusetts follows a similar model: Basic Service supply is procured in six-month blocks.
Recent filings across the region show a consistent pattern: rate levels are adjusted on a regular schedule, and utilities often recieve some level of increase or cost recovery—even when regulators scale back on the original request.
Take Control of Your Future
The most reliable way to protect yourself from ongoing rate changes and unpredictable utility bills is to reduce your dependence on the electrical grid. For many New England homeowners, going solar (the right way) is the most effective path toward long-term cost stability and energy independence.
Next Steps
We recommend getting at least three solar quotes and researching each installer carefully before signing anything. A quality solar project should feel transparent, data-driven, and tailored to your home. If at any poin in the sales process you feel rushed, confused, or concerned, we urge you to step back and reconsider your options.
Going solar can be economically beneficial for many homeowners, but that’s not always the case. Some homes are not fit for solar. Whether they don’t have enough sun, have too many trees, or a complex roof layout, a quality solar installer will tell you the truth instead of pressuring you into a deal that does not benefit you.
Isaksen Solar
We’re a leading solar installer and servicer in New England. We’ve completed almost 3,000 solar projects and have over 400 5-star Google reviews. We’re happy to assess your property and see if going solar makes sense for you.
Got Questions? We’ve Got Answers.
Call us at 508-988-8888 or email us at [email protected].
