Peak Sun Hours in Las Tunas, Las Tunas Province, Cuba
- Solar zone
- Zone 4 (excellent)
- Best month
- July (6.3)
- Worst month
- December (4.0)
- Climate
- Tropical · 26.9°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 4.20 | 5.21 | 5.18 | 1.42 | 24.5 | 72 |
| Feb | 5.07 | 6.04 | 5.91 | 1.56 | 25.3 | 68 |
| Mar | 5.74 | 6.90 | 5.69 | 1.98 | 26.0 | 64 |
| Apr | 6.19 | 7.46 | 5.57 | 2.20 | 27.3 | 64 |
| May | 6.03 | 7.59 | 4.74 | 2.37 | 27.6 | 71 |
| Jun | 6.12 | 7.52 | 4.27 | 2.63 | 28.3 | 75 |
| Jul | 6.35 | 7.50 | 4.71 | 2.53 | 28.8 | 73 |
| Aug | 6.17 | 7.32 | 4.81 | 2.39 | 28.9 | 74 |
| Sep | 5.66 | 6.83 | 4.74 | 2.19 | 28.5 | 75 |
| Oct | 4.84 | 6.03 | 4.48 | 1.92 | 27.2 | 80 |
| Nov | 4.27 | 5.30 | 4.95 | 1.55 | 25.6 | 78 |
| Dec | 4.05 | 4.90 | 5.32 | 1.31 | 25.0 | 76 |
GHI, Clear-sky, DNI, DHI in kWh/m²/day. Data: NASA POWER climatology (long-term monthly averages).
Off-grid calculator
Add appliances
- 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 4.05 kWh/m²/day, 0.77 system efficiency.
About solar in Las Tunas
Las Tunas, Cuba has a warm, tropical climate with a distinct wet and dry season. Its annual peak sun hours average 5.39 kWh/m²/day, a excellent solar resource by global standards.
The strongest month in Las Tunas is July (summer) at 6.35 kWh/m²/day, and the weakest is December (winter) at 4.05 kWh/m²/day. When sizing a year-round off-grid system, it's standard practice to design against the December value rather than the annual average — otherwise the battery bank runs low during the darkest weeks.
Las Tunas'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 Las Tunas?
- Las Tunas averages 5.39 peak sun hours per day annually, ranging from 4.05 in December to 6.35 in July.
- How many solar panels do I need in Las Tunas?
- Panel count depends on your daily load. At Las Tunas's annual average of 5.39 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 Las Tunas?
- Sizing against Las Tunas's worst month (December, 4.05 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 Las Tunas's solar resource compare globally?
- Las Tunas sits in solar zone 4 out of 5 (where 5 is strongest) at 5.39 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 Las Tunas?
- Las Tunas's dry-season output peaks at 6.35 kWh/m²/day in July; the wet season drops it to 4.05 in December. That ~43% swing is a key sizing consideration.
- Can solar panels survive tropical storms in Las Tunas?
- Most tier-1 PV panels are rated for 140+ mph wind loads; mounting hardware usually fails first. In cyclone-prone regions like Cuba, specify IEC 61215-certified panels and anchor-bolt mounts rather than ballasted.
- What's the dry-to-wet output gap in Las Tunas?
- Las Tunas swings from 6.35 kWh/m²/day in July (dry) to 4.05 in December (wet) — roughly 43%. Year-round off-grid systems must size against the wet-season minimum.