Peak Sun Hours in Toluca, México, Mexico
- Solar zone
- Zone 4 (excellent)
- Best month
- April (6.6)
- Worst month
- December (4.8)
- Climate
- Temperate · 13.8°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 4.86 | 5.59 | 5.39 | 1.56 | 10.4 | 61 |
| Feb | 5.68 | 6.40 | 5.81 | 1.72 | 12.3 | 55 |
| Mar | 6.40 | 7.31 | 5.92 | 1.96 | 14.1 | 50 |
| Apr | 6.61 | 7.78 | 5.39 | 2.22 | 16.4 | 48 |
| May | 6.26 | 7.80 | 4.34 | 2.46 | 17.2 | 55 |
| Jun | 5.66 | 7.90 | 3.40 | 2.49 | 16.1 | 69 |
| Jul | 5.50 | 7.84 | 3.02 | 2.54 | 15.0 | 77 |
| Aug | 5.51 | 7.68 | 3.17 | 2.52 | 14.8 | 79 |
| Sep | 4.88 | 7.15 | 2.79 | 2.34 | 14.1 | 82 |
| Oct | 5.07 | 6.51 | 4.24 | 1.96 | 13.1 | 78 |
| Nov | 4.92 | 5.75 | 5.34 | 1.58 | 11.6 | 71 |
| Dec | 4.78 | 5.32 | 5.62 | 1.49 | 10.8 | 64 |
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 4.78 kWh/m²/day, 0.77 system efficiency.
About solar in Toluca
Toluca, Mexico has a temperate climate with meaningful seasonal variation in solar resource. Its annual peak sun hours average 5.51 kWh/m²/day, a excellent solar resource by global standards.
The strongest month in Toluca is April (spring) at 6.61 kWh/m²/day, and the weakest is December (winter) at 4.78 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.
Toluca'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 Toluca?
- Toluca averages 5.51 peak sun hours per day annually, ranging from 4.78 in December to 6.61 in April.
- How many solar panels do I need in Toluca?
- Panel count depends on your daily load. At Toluca's annual average of 5.51 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 Toluca?
- Sizing against Toluca's worst month (December, 4.78 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 Toluca's solar resource compare globally?
- Toluca sits in solar zone 4 out of 5 (where 5 is strongest) at 5.51 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 Toluca?
- Toluca's worst month (December) delivers 4.78 kWh/m²/day — about 72% of the summer peak of 6.61. Off-grid systems here typically oversize 1.5–2× or pair with a backup source.
- Do cloudy days significantly affect Toluca's solar?
- Partly. Diffuse light still produces 10–25% of clear-sky output. Toluca's 5.51 kWh/m²/day already reflects average cloudiness, so no further derating is needed for sizing.
- What panel tilt works best in Toluca?
- At Toluca's latitude (19°), a fixed tilt near 19° balances year-round yield. Winter-heavy loads favor latitude + 15°; summer-heavy, latitude − 15°.