Peak Sun Hours in Tuxtla, Chiapas, Mexico
- Solar zone
- Zone 4 (excellent)
- Best month
- April (6.3)
- Worst month
- December (4.4)
- Climate
- Temperate · 20.5°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 4.52 | 5.69 | 5.15 | 1.37 | 17.3 | 85 |
| Feb | 5.36 | 6.37 | 5.60 | 1.55 | 18.6 | 82 |
| Mar | 6.07 | 7.03 | 5.64 | 1.84 | 20.1 | 77 |
| Apr | 6.29 | 7.15 | 4.98 | 2.20 | 22.4 | 72 |
| May | 5.76 | 7.18 | 3.65 | 2.50 | 23.2 | 75 |
| Jun | 5.42 | 7.50 | 3.20 | 2.46 | 22.2 | 84 |
| Jul | 5.91 | 7.51 | 3.66 | 2.55 | 22.1 | 84 |
| Aug | 5.77 | 7.40 | 3.63 | 2.48 | 21.9 | 86 |
| Sep | 5.02 | 7.03 | 3.05 | 2.31 | 21.5 | 89 |
| Oct | 4.75 | 6.44 | 3.69 | 1.99 | 20.5 | 90 |
| Nov | 4.57 | 5.84 | 4.94 | 1.55 | 18.6 | 89 |
| Dec | 4.41 | 5.48 | 5.37 | 1.31 | 17.9 | 87 |
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 4.41 kWh/m²/day, 0.77 system efficiency.
About solar in Tuxtla
Tuxtla, Mexico has a temperate climate with meaningful seasonal variation in solar resource. Its annual peak sun hours average 5.32 kWh/m²/day, a excellent solar resource by global standards.
The strongest month in Tuxtla is April (spring) at 6.29 kWh/m²/day, and the weakest is December (winter) at 4.41 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.
Tuxtla'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 Tuxtla?
- Tuxtla averages 5.32 peak sun hours per day annually, ranging from 4.41 in December to 6.29 in April.
- How many solar panels do I need in Tuxtla?
- Panel count depends on your daily load. At Tuxtla's annual average of 5.32 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 Tuxtla?
- Sizing against Tuxtla's worst month (December, 4.41 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 Tuxtla's solar resource compare globally?
- Tuxtla sits in solar zone 4 out of 5 (where 5 is strongest) at 5.32 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 much does winter reduce solar output in Tuxtla?
- Tuxtla's worst month (December) delivers 4.41 kWh/m²/day — about 70% of the summer peak of 6.29. Off-grid systems here typically oversize 1.5–2× or pair with a backup source.
- Do cloudy days significantly affect Tuxtla's solar?
- Partly. Diffuse light still produces 10–25% of clear-sky output. Tuxtla's 5.32 kWh/m²/day already reflects average cloudiness, so no further derating is needed for sizing.
- What panel tilt works best in Tuxtla?
- At Tuxtla's latitude (17°), a fixed tilt near 17° balances year-round yield. Winter-heavy loads favor latitude + 15°; summer-heavy, latitude − 15°.