Peak Sun Hours in Tarlac City, Central Luzon, Philippines
- Solar zone
- Zone 4 (excellent)
- Best month
- April (6.4)
- Worst month
- August (4.3)
- Climate
- Tropical · 26.7°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 4.67 | 5.63 | 4.61 | 1.80 | 24.5 | 78 |
| Feb | 5.36 | 6.34 | 4.88 | 1.97 | 25.8 | 72 |
| Mar | 6.04 | 6.93 | 4.98 | 2.22 | 27.7 | 66 |
| Apr | 6.39 | 7.30 | 5.07 | 2.31 | 29.6 | 64 |
| May | 5.84 | 7.38 | 4.02 | 2.41 | 29.1 | 73 |
| Jun | 5.31 | 7.34 | 3.17 | 2.48 | 27.5 | 84 |
| Jul | 4.77 | 7.30 | 2.42 | 2.44 | 26.6 | 88 |
| Aug | 4.27 | 7.20 | 1.74 | 2.40 | 26.4 | 90 |
| Sep | 4.73 | 6.94 | 2.49 | 2.44 | 26.4 | 89 |
| Oct | 4.85 | 6.39 | 3.49 | 2.18 | 26.2 | 87 |
| Nov | 4.51 | 5.73 | 4.01 | 1.86 | 25.6 | 87 |
| Dec | 4.30 | 5.35 | 4.20 | 1.74 | 24.9 | 84 |
GHI, Clear-sky, DNI, DHI in kWh/m²/day. Data: NASA POWER climatology (long-term monthly averages).
Off-grid calculator
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- Add an appliance to size a system.
Sizing
- Daily load
- 0.00 kWh
- Panel wattage
- 0 W
- Panel count (400W modules)
- 0
- Battery bank
- 0.0 kWh
Sizing against worst-month PSH of 4.27 kWh/m²/day, 0.77 system efficiency.
About solar in Tarlac City
Tarlac City, Philippines has a warm, tropical climate with a distinct wet and dry season. Its annual peak sun hours average 5.09 kWh/m²/day, a excellent solar resource by global standards.
The strongest month in Tarlac City is April (spring) at 6.39 kWh/m²/day, and the weakest is August (summer) at 4.27 kWh/m²/day. When sizing a year-round off-grid system, it's standard practice to design against the August value rather than the annual average — otherwise the battery bank runs low during the darkest weeks.
Tarlac City's solar conditions are well within the range where off-grid PV is a straightforward engineering exercise with standard-sized arrays and lithium batteries.
FAQ
- What are the peak sun hours in Tarlac City?
- Tarlac City averages 5.09 peak sun hours per day annually, ranging from 4.27 in August to 6.39 in April.
- How many solar panels do I need in Tarlac City?
- Panel count depends on your daily load. At Tarlac City's annual average of 5.09 kWh/m²/day, a 5 kWh/day load needs roughly 4 × 400 W panels. Use the calculator above for your actual load.
- What size battery do I need in Tarlac City?
- Sizing against Tarlac City's worst month (August, 4.27 kWh/m²/day) with 2 days of autonomy at 80% depth of discharge, a 5 kWh/day load needs about a 12.5 kWh battery bank.
- How does Tarlac City's solar resource compare globally?
- Tarlac City sits in solar zone 4 out of 5 (where 5 is strongest) at 5.09 kWh/m²/day — excellent by global standards. For reference, top-tier desert sites average ~6.5 and high-latitude cities around 2.5 kWh/m²/day.
- How does the wet season affect solar generation in Tarlac City?
- Tarlac City's dry-season output peaks at 6.39 kWh/m²/day in April; the wet season drops it to 4.27 in August. That ~42% swing is a key sizing consideration.
- Can solar panels survive tropical storms in Tarlac City?
- Most tier-1 PV panels are rated for 140+ mph wind loads; mounting hardware usually fails first. In cyclone-prone regions like Philippines, specify IEC 61215-certified panels and anchor-bolt mounts rather than ballasted.
- What's the dry-to-wet output gap in Tarlac City?
- Tarlac City swings from 6.39 kWh/m²/day in April (dry) to 4.27 in August (wet) — roughly 42%. Year-round off-grid systems must size against the wet-season minimum.