Typical year
7,630 kWhabout 636 kWh per month on averageSt Ann solar guide
A broad north-coast parish with meaningful east–west variation.
St Ann’s western and northwestern cells are stronger than much of the central and eastern interior. Coastal development, hills and heavy vegetation make roof conditions just as important.
Local data guide · published 31 August 2026
Try a system size
What would that mean on a roof?
These figures estimate electricity from the panels, not money saved. A kWh is one unit of electricity on your bill; kW describes the panel system’s rated size. Your savings depend on when you use that electricity, whether you store it in a battery and whether you send any to JPS Jamaica.
Middle half of locations
7,475–7,813 kWhDifferences between locations; your roof can change the resultStrongest month
March · 697 kWhLong-term average, not a forecastWeakest month
November · 570 kWhAbout 18% below March
About 1,410About 1,640 kWh/kWp
The parish is not one number
The west is stronger. Central and eastern hills are more moderate.
The model is generally stronger toward the Runaway Bay and western side of the parish. Output is lower across parts of the central and eastern interior, including hillier terrain away from the coast.
The central geographic range is not extreme, but vegetation and local cloud around a particular roof can create a larger practical difference.
- Cells analysed
- 1,532
- Central geographic range
- 1,495–1,563
- Typical variation
- About ±2%
Month by month
How does solar output change through the year?
March is strongest in the long-term model. November produces about 82% of that output, so the annual figure should not be treated as twelve identical months.
View the monthly figures as a table
| Month | Per installed kW | 5 kW system |
|---|---|---|
| January | 117.7 kWh | 588 kWh |
| February | 119.4 kWh | 597 kWh |
| March | 139.5 kWh | 697 kWh |
| April | 134.3 kWh | 672 kWh |
| May | 128.8 kWh | 644 kWh |
| June | 127.8 kWh | 639 kWh |
| July | 136.0 kWh | 680 kWh |
| August | 135.6 kWh | 678 kWh |
| September | 131.4 kWh | 657 kWh |
| October | 127.2 kWh | 636 kWh |
| November | 114.0 kWh | 570 kWh |
| December | 114.3 kWh | 571 kWh |
Before asking for quotes
Questions worth asking in St Ann.
- Will vegetation shade the array?Fast-growing trees can change a good design after installation. Preserve trimming access and ask how partial shade is handled electrically.
- Is the roof coastal or inland?Salt exposure near the north coast and damp, vegetated inland settings create different enclosure, fastener and maintenance requirements.
- Can the mounting survive hurricane uplift?Ask for attachment spacing, the identified roof structure and the waterproofing method—not a generic claim that the panels are hurricane rated.
- Is service coverage real?For properties outside the main coastal towns, confirm call-out arrangements, monitoring responsibility and likely replacement-part lead times.
Use the Jamaica panel and roof guide to test the mounting and equipment answers in a quotation.
Generation is not the bill
A 5 kW system making 636 kWh a month will not automatically erase the same-sized bill.
Timing decides value
Solar used in the home avoids the retail cost of a JPS Jamaica unit. Surplus sent through net billing receives a much lower export credit.
A battery moves energy
A battery can carry daytime generation into evening use and provide outage cover, but it does not make the panels generate more.
Your roof changes the result
Shade, direction, heat, dirt, cable losses and equipment choices move a real installation away from the parish benchmark. Use the panel guide to test those roof assumptions.
How we calculated this
Where do these estimates come from?
We use long-term sunshine data to estimate panel output across the parish. These are planning averages, not a forecast for your roof. Shade, roof direction and equipment can change the result.
See the data, calculation and source assumptions
We selected the 1,532 Global Solar Atlas PVOUT grid cells whose centres fall inside the St Ann parish boundary, then calculated the annual mean, central 50% range and monthly means.
The source models a free-standing crystalline-silicon system at optimum fixed tilt. It is useful for parish comparison and early planning, not a guarantee for a particular roof.
- Solar source
- Global Solar Atlas 2.0 PVOUT
- Source years
- 1999–2018 long-term average
- Spatial resolution
- 30 arc-seconds, approximately 1 km
- Calculation
- Jamaica Solar Check parish aggregation
Solar data obtained from Global Solar Atlas 2.0, developed and operated by Solargis on behalf of the World Bank Group with ESMAP funding. Source data © 2019 Solargis, CC BY 4.0. Parish calculations and colour map are adaptations by Jamaica Solar Check; the source organisations do not endorse this site. Boundary geometry: geoBoundaries JAM ADM1, sourced from OpenStreetMap/Wambacher, CC BY-SA 2.0.