About the Tilt & Azimuth Optimizer
Tilt and azimuth set the mounting angle and orientation of solar panels. Getting them right maximizes annual energy — for a fixed system in India that means facing true south with a tilt roughly equal to the site latitude.
Formula
Optimal fixed tilt ≈ site latitude (degrees)
- latitude
- Your location's latitude, e.g. ~28° for Delhi
How to calculate it
- 1Face the array towards true (geographic) south in India — azimuth 180°.
- 2Set the fixed tilt approximately equal to the site latitude for maximum annual yield.
- 3Tilt a few degrees lower to favour summer generation, or higher to favour winter, if your load is seasonal.
- 4Keep enough inter-row spacing so tilted rows don't shade the row behind at low winter sun angles.
Worked example
In Delhi (latitude ≈ 28.6°N), a south-facing fixed tilt of about 28° gives the best annual output; flattening to ~15° raises summer generation at a small annual cost.
What you can calculate
- Optimal tilt
- Azimuth gain %
- Seasonal adjustment
- E-W bifacial
Standards & references
Frequently asked questions
Which direction should solar panels face in India?
True south (azimuth 180°) for anywhere in India, since the sun is in the southern sky over the year. Small deviations (south-east/south-west) cost only a few percent, but north-facing arrays should be avoided.
What is the best tilt angle for solar panels?
For maximum annual energy from a fixed array, use a tilt roughly equal to your latitude. Lower tilts favour summer, higher tilts favour winter — adjust if your consumption is seasonal.
You might also need
System Designer
Design custom solar system with component selection and layout optimization
OpenPanel Requirements
Calculate number of panels needed based on your energy consumption and roof space
OpenBattery Bank Sizing
LFP / NMC / Lead-Acid bank sizing with DoD, autonomy hours, temp derating, and S×P config
OpenSolar Plant Size
Size your plant in kWp from load (kWh/day) or available rooftop area
OpenInverter Sizing
Recommend inverter kVA from DC array kWp with DC:AC ratio and phase checks
OpenString Sizing
Temperature-corrected Voc / Vmp string sizing with MPPT window and safety margin checks
Open