How much electricity do solar panels make in Surabaya, Indonesia?
≈ 6,355 kWh a year
In Surabaya, Indonesia, ten 400 W mono PERC solar panels (4 kWp) on a roof facing the equator at the best yearly tilt (10°) make about 6,355 kWh of electricity a year — 1,589 kWh for every installed kilowatt.
1,589 kWh/kWpspecific yield per year
10°best yearly panel tilt
1,949 kWh/m²yearly sunlight on level ground
Septemberbest month (February lowest)
Solar energy month by month in Surabaya
| Month | 4 kWp system (kWh) | per kWp (kWh) |
|---|---|---|
| January | 476 | 119 |
| February | 450 | 112 |
| March | 520 | 130 |
| April | 515 | 129 |
| May | 531 | 133 |
| June | 515 | 129 |
| July | 558 | 139 |
| August | 608 | 152 |
| September | 612 | 153 |
| October | 596 | 149 |
| November | 512 | 128 |
| December | 462 | 115 |
How these numbers were calculated
NASA POWER long-term monthly means on a 1° grid around the city, the monthly method of Duffie & Beckman (isotropic sky, each month's average day), panel temperature from NOCT, 10 % other losses and a 96 % inverter. No shading, snow or product-specific data; expect ±10 % against a detailed tool such as PVGIS. To change the number of panels, their rating, tilt, direction or your roof size, use Blorp's free solar roof tool — every result shows its equation and the numbers used.