Solar Energy in Las Marías
Las Marías is located at 18.3°N, 67.0°W in Puerto Rico. Here's what solar energy looks like for homeowners in this area.
Annual Irradiance
1,751
kWh/m²
Peak Sun Hours
4.1
hrs/day
3 kWp Output
4,518
kWh/year
Solar Score
30
/ 100
What does this mean for your roof?
Las Marías receives approximately 1,751 kWh/m² of solar irradiance per year, which translates to 4.1 peak sun hours per day. This is moderate for residential solar energy production.
With a solar score of 30/100, Las Marías ranks #92 of 93 cities in Puerto Rico for solar potential in our atlas.
A typical 3 kWp residential solar system (7 panels) in Las Marías would produce approximately 4,518 kWh per year, sized for the average household in Puerto Rico.
The best months for solar production in Las Marías are May – August, while the lowest production occurs during November – January. Being in the northern hemisphere, south-facing roofs capture the most annual sunlight.
Solar economics in Las Marías
At current electricity prices in Puerto Rico ($0.049/kWh), residential solar may not pay for itself within the typical 25-year panel lifespan without local incentives. Rising electricity costs or government subsidies could change this outlook.
System Cost
$8,400
3 kWp, before incentives
Annual Savings
~$128
At $0.049/kWh
Payback Period
25+ years
Exceeds panel lifespan
25-Year Net Result
−$4,319
Cost exceeds savings
These are approximate figures based on a standardized household consumption of 5,000 kWh/year and an estimated electricity rate of $0.049/kWh in Puerto Rico. Local incentives may reduce the upfront cost — check current subsidy, tax-credit, or VAT programs in Puerto Rico, as these can meaningfully shorten the payback period.
Figures are estimates based on typical system assumptions and the latest available electricity-price and billing data for Puerto Rico. Actual costs, tariffs, net-metering rules, and incentives vary by utility and change over time — confirm with a local installer or energy authority before making decisions.
How solar billing works in Puerto Rico
Exports and imports are priced separately, usually at different rates.
In Puerto Rico, rooftop solar appears to fall under a net-billing-style approach, where the energy you export and the energy you import are typically valued separately rather than simply cancelling out. Exports are often credited at a rate that may be lower than the retail price you pay for imported power, which generally rewards using your own generation as it is produced. The precise export and import prices vary by region and utility and change over time, so they should be confirmed locally.
Get your exact numbers
Our calculator uses NASA satellite data for your precise location — not city-level estimates. Free, instant, no signup.
Solar tips for Las Marías homeowners
Face panels south
In the northern hemisphere, south-facing panels capture the most annual sunlight. East-west split systems also work well.
Optimal tilt angle
For Las Marías, the energy-optimal panel tilt is about 20° from horizontal.
Size your system right
For the average household in Puerto Rico, a 3 kWp system (7 panels) covers most electricity needs. Use our calculator for a personalized estimate.
Check local incentives
Local incentives may reduce the upfront cost of residential solar — check current subsidy, tax-credit, and VAT programs with your energy authority in Puerto Rico.
Gear to prepare for solar
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Solar in other Puerto Rico cities
Frequently asked questions about solar in Las Marías
How much do solar panels cost in Las Marías?
A typical 3 kWp residential solar system in Las Marías, Puerto Rico costs approximately $8,400 before incentives — this is an estimate based on typical regional pricing. Local incentives such as subsidies, tax credits, or VAT exemptions may reduce the upfront cost; check current programs in Puerto Rico.
How are solar exports valued under net billing in Puerto Rico?
Under a net-billing-style scheme, exports from your system in Puerto Rico are typically bought at one rate while the electricity you import is charged at another, and the two are usually not the same. Because the export credit may be lower than the retail import price, consuming your own solar power directly tends to be the most valuable option. Actual rates vary by region and utility and can change, so confirm the current figures with a local installer or energy authority.
How much electricity do solar panels produce in Las Marías?
A 3 kWp solar system in Las Marías produces approximately 4,518 kWh per year, based on 4.1 peak sun hours per day and 1,751 kWh/m² annual irradiance.
What is the solar panel payback period in Las Marías?
At Puerto Rico's current electricity rate of $0.049/kWh, a solar system in Las Marías is unlikely to pay for itself within the typical 25-year panel lifespan without subsidies or incentives. However, rising electricity prices or local incentive programs could improve the economics significantly.
Which direction should solar panels face in Las Marías?
In Las Marías, panels should ideally face south since it's in the northern hemisphere. The optimal tilt angle is about 20° from horizontal.
How many solar panels do I need for my home in Las Marías?
A typical household in Puerto Rico uses the equivalent of a 3 kWp system (7 panels). With 4.1 peak sun hours per day in Las Marías, this covers most electricity needs. Use our calculator for a personalized estimate.