Solar Energy in Tulagi
Tulagi is located at 9.1°S, 160.2°E in Solomon Islands. Here's what solar energy looks like for homeowners in this area.
Annual Irradiance
1,697
kWh/m²
Peak Sun Hours
4
hrs/day
3 kWp Output
4,377
kWh/year
Solar Score
98
/ 100
What does this mean for your roof?
Tulagi receives approximately 1,697 kWh/m² of solar irradiance per year, which translates to 4 peak sun hours per day. This is excellent for residential solar energy production.
With a solar score of 98/100, Tulagi ranks #16 of 18 cities in Solomon Islands for solar potential in our atlas.
A typical 3 kWp residential solar system (7 panels) in Tulagi would produce approximately 4,377 kWh per year, sized for the average household in Solomon Islands.
The best months for solar production in Tulagi are Year-round (minimal seasonal variation), while the lowest production occurs during Rainy season (varies by region). Being in the southern hemisphere, north-facing roofs capture the most annual sunlight.
Estimated savings in Tulagi
System Cost
$28,100
3 kWp, before incentives
Annual Savings
~$13,700
At $5.88/kWh
Payback Period
~2 years
Before local incentives
25-Year Net Result
~$409,900
Savings minus system cost
These are approximate figures based on a standardized household consumption of 5,000 kWh/year and an estimated electricity rate of $5.88/kWh in Solomon Islands. Local incentives may reduce the upfront cost — check current subsidy, tax-credit, or VAT programs in Solomon Islands, 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 Solomon Islands. 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 Solomon Islands
Exports and imports are priced separately, usually at different rates.
In Solomon Islands, 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
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Solar tips for Tulagi homeowners
Face panels north
In the southern hemisphere, north-facing panels capture the most annual sunlight. East-west split systems also work well.
Optimal tilt angle
For Tulagi, the energy-optimal panel tilt is about 10° from horizontal.
Size your system right
For the average household in Solomon Islands, 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 Solomon Islands.
Gear to prepare for solar
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Solar in other Solomon Islands cities
Frequently asked questions about solar in Tulagi
How much do solar panels cost in Tulagi?
A typical 3 kWp residential solar system in Tulagi, Solomon Islands costs approximately $28,100 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 Solomon Islands.
How are solar exports valued under net billing in Solomon Islands?
Under a net-billing-style scheme, exports from your system in Solomon Islands 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 Tulagi?
A 3 kWp solar system in Tulagi produces approximately 4,377 kWh per year, based on 4 peak sun hours per day and 1,697 kWh/m² annual irradiance.
What is the solar panel payback period in Tulagi?
Based on Solomon Islands's electricity rate of $5.88/kWh, a 3 kWp system in Tulagi pays for itself in approximately 2 years before incentives. After that, the electricity it generates is essentially free for the remaining panel lifespan of 25+ years.
Which direction should solar panels face in Tulagi?
In Tulagi, panels should ideally face north since it's in the southern hemisphere. The optimal tilt angle is about 10° from horizontal.
How many solar panels do I need for my home in Tulagi?
A typical household in Solomon Islands uses the equivalent of a 3 kWp system (7 panels). With 4 peak sun hours per day in Tulagi, this covers most electricity needs. Use our calculator for a personalized estimate.