Bring down the bill
See estimated monthly and annual savings, based on your electricity use and when your household needs power.
Jamaica solar calculator
Would solar really lower your JPS bill?
Find out what solar could save you, the system you might need and what could stay running when JPS goes off. Start with your bill or roughly what you pay.
Free to use. No sign-up. About a minute to get started.
Your bill stays in your browser. We don’t sell or install solar.
See an example first ↓Before you ask for a quotation
Know what you’re buying solar to do.
Find a sensible system size
Compare three solar and battery options. More equipment costs more; the results help you see what the extra capacity buys.
Plan for JPS going off
See how long backup could last if you cut back on electricity use and storm weather reduces sunshine.
An illustrative household · not a customer result
What could a J$30,000 bill look like with solar?
Take a home in St Catherine with someone home during the day and air conditioning on for part of it. Here is the calculator’s Balanced option for that example.
Modelled monthly bill savingsJ$23,000–25,700
Across the model’s twelve months. These are electricity savings before equipment, finance and upkeep costs.
- Solar panels
- 3 kW
- Battery capacity
- 5 kWh
- Payment for exported power
- None assumed
Illustration calculated 7 September 2026 using the calculator’s March 2026 JPS RT10 tariff, a 30.4-day starting bill and Global Solar Atlas parish data. The range shows seasonal monthly variation, not a guarantee or a forecast of changing rates. Your roof, habits and bill can change the answer.
The useful question is what works for your house. A household using most of its power after dark may get a different result from the same panels.
No equipment knowledge needed
A few questions about the house you live in.
Start with what you pay
Use the PDF bill JPS emails you, type a monthly amount or choose a rough bill range. The PDF lets us read your own usage and rates; a typed amount uses our March 2026 example residential rates.
Tell us about your household
Choose your parish, when you use electricity, how much backup matters and your roof type. One question at a time, with an explanation of why it matters.
Compare your options
Explore system sizes, savings and backup. Take the estimate into a conversation with an installer, or use it to decide what to learn next.
Why two similar bills can need different systems
Your bill is the starting point.
When you use power
Panels produce during daylight. Cooking, washing or working from home during those hours changes how much solar you can use directly.
Understand self-use and net billing →How you cool the house
An AC running through the afternoon and one cooling a bedroom all night put different demands on solar and batteries.
Check AC size and running costs →Your parish and roof
Local sunshine affects production. Shade, usable roof space and the direction panels face still need an on-site check.
Explore solar in your parish →What must stay on
Keeping the fridge, lights and internet running is a different job from carrying the whole house. Choose the essentials before choosing a battery.
Understand battery size and runtime →How we calculate the estimate
We turn your bill into daily electricity use, then model household demand, solar production and battery charging hour by hour. Parish sunshine data provides the annual and monthly production patterns. The results compare electricity bought from JPS before and after solar.
The model uses typical household patterns, not measurements of every appliance. Its outage view assumes a full battery at the start, reduced household use and reduced sunshine. It cannot inspect shading, assess roof strength or design your electrical installation.
Read the parish data methodology and about Jamaica Solar Check for the background to the estimate.
Still getting familiar with solar?
Start with the decision in front of you.
Which panels suit my roof? Heat, coastal salt, roof fit and hurricane exposure.
How much battery do I need? Capacity, essential appliances and overnight runtime.
What will an AC add to my bill? Room sizing, inverter ACs and a simple usage estimate.
What happens to spare solar? Export credits and the net-billing application process.
Could I claim the tax credit? Eligibility, worked examples and documents to keep.
What should I ask an installer? Credentials, comparable quotations and deposit checks.
Before you start
A few fair questions.
Is this a quotation for a solar system?
No. The calculator estimates electricity savings, system size and backup performance. It does not price an installation. You need a site assessment and a written quotation covering the actual equipment and work.
Will solar eliminate my JPS bill?
Don’t plan on it. You may still buy electricity at night or in poor weather, and fixed charges remain. The calculator keeps a minimum bill in its model rather than promising a zero balance.
Do I need a battery?
That depends on when you use electricity and how much backup matters. A battery can shift daytime solar into the evening, but adds cost. Outage backup also needs compatible equipment and correctly designed backup circuits; a battery’s capacity alone does not guarantee that your house will stay on.
How accurate is this Jamaica solar calculator?
It is a starting estimate for comparing options. Your PDF bill provides better usage and tariff information than a rough monthly amount. Actual results depend on weather, shading, equipment, electricity rates and your household routine. An installer should check those assumptions before you buy.
Can I use it without uploading a bill?
Yes. Type roughly what you pay or pick a bill range. The calculator estimates electricity use from that amount using our March 2026 example residential rates. If you choose a PDF instead, it is read in your browser and never sent to us.
Can I use this for a shop or small business?
The calculator is designed for homes, using residential bill assumptions and household routines. For a business, ask an installer to use your actual JPS bill rates, opening hours and equipment list. Our small business guidance can help you prepare.
Will I have to speak to an installer?
No. You can see your results without giving us contact details. If you want to take things further, you choose whom to contact.
Start with your own numbers
See what solar could do for your home.
A rough bill is enough to begin. You can explore the details once you have an estimate.
Independent. Free to use. Your bill stays with you.