Peak Sun Hours in Sancti Spíritus, Sancti Spíritus Province, Cuba
- Solar zone
- Zone 4 (excellent)
- Best month
- April (6.8)
- Worst month
- December (4.2)
- Climate
- Tropical · 25.8°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 4.45 | 5.06 | 5.76 | 1.32 | 22.7 | 73 |
| Feb | 5.35 | 5.91 | 6.52 | 1.38 | 23.8 | 69 |
| Mar | 6.20 | 6.80 | 6.67 | 1.67 | 24.8 | 65 |
| Apr | 6.75 | 7.39 | 6.61 | 1.90 | 26.4 | 64 |
| May | 6.39 | 7.56 | 5.39 | 2.21 | 27.0 | 70 |
| Jun | 6.22 | 7.49 | 4.57 | 2.50 | 27.5 | 75 |
| Jul | 6.62 | 7.46 | 5.20 | 2.42 | 28.0 | 74 |
| Aug | 6.42 | 7.26 | 5.40 | 2.21 | 28.1 | 75 |
| Sep | 5.74 | 6.73 | 5.00 | 2.07 | 27.6 | 77 |
| Oct | 4.97 | 5.93 | 4.91 | 1.77 | 26.5 | 79 |
| Nov | 4.53 | 5.18 | 5.59 | 1.38 | 24.4 | 77 |
| Dec | 4.19 | 4.75 | 5.67 | 1.24 | 23.5 | 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 4.19 kWh/m²/day, 0.77 system efficiency.
About solar in Sancti Spíritus
Sancti Spíritus, Cuba has a warm, tropical climate with a distinct wet and dry season. Its annual peak sun hours average 5.65 kWh/m²/day, a excellent solar resource by global standards.
The strongest month in Sancti Spíritus is April (spring) at 6.75 kWh/m²/day, and the weakest is December (winter) at 4.19 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.
Sancti Spíritus'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 Sancti Spíritus?
- Sancti Spíritus averages 5.65 peak sun hours per day annually, ranging from 4.19 in December to 6.75 in April.
- How many solar panels do I need in Sancti Spíritus?
- Panel count depends on your daily load. At Sancti Spíritus's annual average of 5.65 kWh/m²/day, a 5 kWh/day load needs roughly 3 × 400 W panels. Use the calculator above for your actual load.
- What size battery do I need in Sancti Spíritus?
- Sizing against Sancti Spíritus's worst month (December, 4.19 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 Sancti Spíritus's solar resource compare globally?
- Sancti Spíritus sits in solar zone 4 out of 5 (where 5 is strongest) at 5.65 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 Sancti Spíritus?
- Sancti Spíritus's dry-season output peaks at 6.75 kWh/m²/day in April; the wet season drops it to 4.19 in December. That ~45% swing is a key sizing consideration.
- Can solar panels survive tropical storms in Sancti Spíritus?
- 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 Sancti Spíritus?
- Sancti Spíritus swings from 6.75 kWh/m²/day in April (dry) to 4.19 in December (wet) — roughly 45%. Year-round off-grid systems must size against the wet-season minimum.