Best solar panel tilt angle and direction for Hyderabad and Anantapur

Two rooftop systems with identical panels and inverters can produce noticeably different amounts of power, simply because of the way the panels face and the angle they sit at. Getting direction and tilt right costs almost nothing extra at installation, and it pays back every single day for 25 years.

This guide explains which direction panels should face in Telangana and Andhra Pradesh, what tilt angle makes sense, and why the theoretical "best" angle is not always the right choice for a real roof.

The short answer

• Direction: face the panels south, or as close to south as the roof allows.
• Tilt: a theoretical optimum for fixed panels is often taken as roughly equal to the site's latitude. Hyderabad sits at about 17° North and Anantapur at about 14–15° North. In practice, many flat-roof installations use a slightly lower tilt, such as the 10 to 15 degrees we use on flat roofs, because it balances output against wind load, structure height and row spacing.
• Avoid shade before worrying about the last few degrees of tilt. Shade costs far more output than a small tilt difference.

Why south-facing?

India is north of the equator, so through the year the sun travels across the southern part of the sky. Panels facing south see the sun for the longest time and at the most direct angle across the year, so they collect the most energy.

What if south is not possible?

• East- or west-facing panels still work well, but produce somewhat less over the year than south-facing ones. East-facing panels produce more in the morning; west-facing more in the afternoon.
• East-west split arrays (half the panels facing each way) can make good use of a roof that runs east-west, and spread production through the day.
• North-facing panels should generally be avoided at our latitudes, especially at steep tilts.

If your roof's best side is not due south, a skilled installer can still design a productive system. The output difference between south and south-east or south-west is usually modest.

Why tilt matters

Panels produce the most when sunlight hits them straight on. The sun's height in the sky changes through the day and through the year:

• in summer it climbs high;
• in winter it stays lower.

A fixed panel cannot follow the sun, so the tilt is chosen to give the best total output across the year.

The latitude rule of thumb

A common rule for maximising annual output from a fixed panel is to tilt it at an angle close to the site's latitude. For our region:

• Hyderabad: about 17° North;
• Anantapur: about 14–15° North;
• Vijayawada, Visakhapatnam and Warangal lie somewhat further north, Tirupati and Nellore somewhat further south.

This is a starting point, not a law. Near the optimum, output changes only slowly with tilt, so a few degrees either way makes little difference to the yearly total.

Why we often use 10 to 15 degrees on flat roofs

On flat RCC roofs, we mount panels on raised, galvanised structures at a 10 to 15 degree tilt. That is slightly below the latitude figure for Hyderabad, and close to it for Anantapur. There are practical reasons.

Wind load

A steeper panel acts more like a sail. On rooftops, especially taller buildings, wind can exert large forces. A lower tilt reduces wind load, which keeps the structure secure in storms. Our structures are rated to 150 km/h wind, with two square washers and one spring washer on every fixing.

Row spacing and roof space

Steeper panels cast longer shadows on the row behind them, so rows must be spaced further apart. On a limited roof, a lower tilt lets you fit more panels, which often gives more total output than a smaller array at the "perfect" angle.

Structure height and cost

Steeper tilts need taller rear legs, which means more steel and more cost, and more exposure to wind.

Self-cleaning

Some tilt helps rain wash dust off and lets water drain. Very flat panels (near 0°) collect dust and water, so a modest tilt is worth having. Between 10 and 15 degrees gives useful run-off.

The result is a balance: a tilt that is close enough to the optimum to lose very little energy, while keeping the structure strong, the roof well used and the panels self-cleaning.

Seasonal adjustment: is it worth it?

Some people ask about changing the tilt by season: steeper in winter, flatter in summer. It can squeeze out a little extra energy, but for rooftop systems it is rarely worth it:

• adjustable structures cost more and can loosen over time;
• someone has to climb up and adjust them safely;
• the gain is small compared with keeping panels clean and unshaded.

Fixed structures at a sensible tilt are the practical choice for homes and most businesses.

Shade matters more than tilt

If there is one thing to remember from this guide, it is this: shade costs far more than a few degrees of tilt.

Common sources of shade on Hyderabad and Anantapur rooftops:

• water tanks and lift or stair rooms;
• parapet walls, especially for the first row of panels;
• neighbouring buildings, which may be taller now or in future;
• trees, which grow;
• dish antennas and other rooftop equipment.

Because panels in a string affect each other, shade on even part of one panel can reduce the output of others. A good installer maps shade at different times of day and in different seasons, especially the long winter shadows, before deciding where panels go. Half-cut panels and inverters with multiple MPPT inputs help where some shade cannot be avoided. See our guides to types of solar panels and inverter types.

Sloped roofs and sheet roofs

Not every roof is flat:

• Sloped tiled or concrete roofs: panels are often mounted parallel to the slope. If the slope faces roughly south and is not too steep, this works well without extra structure.
• Metal sheet roofs (factories and sheds): panels usually follow the sheet's slope, fixed with clamps to the sheet profile. Orientation follows the roof.

In both cases, the roof's own direction and slope set the starting point, and the design works around it.

Elevated structures and airflow

Panels lose some output as they get hot. A raised structure lets air flow underneath, keeping panels cooler, which matters in our hot summers. Raised structures also let you keep using the terrace underneath. Our flat-roof installations use elevated frames for this reason.

What this means for output

With good orientation, sensible tilt and no shade, our installations in the Anantapur region produce about 1,550 to 1,600 units per kW per year, with a 3 kW system averaging about 400 units a month and a 5 kW system about 650. Poor orientation or shade can bring this down noticeably. See our article on how many units a solar system generates.

Questions to ask your installer

1. Which direction will the panels face, and why?
2. What tilt angle will you use, and how does it balance output against wind and space?
3. What is the structure's wind rating?
4. How did you assess shade, including winter shadows?
5. How much space will be left between rows?
6. Will the structure be raised enough for airflow and cleaning?

How Origian sets up your array

During the free site visit, we check the roof's orientation, map shading through the day, and look at wind exposure and how you want to use the terrace. On flat roofs we typically use elevated, galvanised structures at a 10 to 15 degree tilt, facing as close to south as the roof allows, with stainless steel bolts and wind-rated fixings. On sloped and sheet roofs, we design around the existing slope.

To see the best layout for your roof, book a free site survey, or read more about our build standards on our Built to Last page.

Row spacing: avoiding self-shading

On flat roofs with more than one row of panels, each row casts a shadow behind it. The shadow is longest in winter, when the sun is low, and in the early morning and late afternoon. If rows are too close, the front row shades the one behind for part of the day, cutting output.

Good practice:

• space rows using the winter sun angle, so the rear row stays unshaded through the main production hours;
• use a modest tilt on tight roofs, which shortens shadows and allows closer rows;
• check parapet walls too, which can shade the first row in winter.

This is one of the main reasons a lower tilt often produces more total energy on a limited roof than a steeper "optimal" tilt.

Orientation on irregular roofs

Many Indian roofs are not neat rectangles facing due south. Common situations:

• Roof edges at an angle to south: panels can often be aligned with the roof edge (for a tidy look and simpler structure) or turned to face south (for a little more output). The difference in output is usually modest, so practicality often wins.
• L-shaped or split roofs: separate arrays on different sections, each on its own inverter MPPT input, keep them from affecting each other.
• Roofs crowded with tanks and equipment: sometimes an elevated structure above obstructions frees up usable space.

Wind: the factor people forget

Wind loads rise with panel tilt, structure height and building height. On upper floors, wind can be much stronger than at street level. A secure structure needs:

• an appropriate tilt for the exposure;
• galvanised members sized for the wind load;
• robust fixings. We use stainless steel bolts, with two square washers and one spring washer on every fixing;
• secure anchoring to the roof, sealed against leaks.

Our structures are rated to 150 km/h wind. Ask any installer what wind speed their structure is rated for.

A quick self-check of an existing system

If you already have panels:

1. Do they face roughly south? If they face north, ask why.
2. Is the tilt reasonable (not completely flat, not unusually steep)?
3. Does any row shade another, especially in winter mornings?
4. Do water tanks, parapets or new buildings cast shadows on the panels at any time of day?
5. Is the structure solid, with no loose fixings or rust?

If you see problems, a maintenance visit can assess whether adjustments are worthwhile.

Tilt and orientation for ground-mounted and farm systems

Ground-mounted systems, such as those at farmhouses or for solar water pumps, are not limited by a roof's shape. That gives more freedom:

• Orientation can be set to face south precisely.
• Tilt can be chosen closer to the latitude, since there is usually more space between rows and no roof-height wind exposure. Wind still matters on open land, and the structure must be anchored securely.
• Row spacing can be generous, avoiding winter self-shading.
• Ground clearance should keep panels above vegetation, splash from rain and grazing animals.

For solar water pumps, the panels need to deliver strong output when water is needed. That often means the middle of the day, which south-facing panels serve well.

Tilt, dust and cleaning

In dusty areas, which include much of Rayalaseema and the outskirts of Hyderabad, tilt affects how quickly dust builds up:

• flatter panels hold more dust and dry rain residue;
• steeper panels shed more dust with rain and wind;
• the bottom edge of the panel tends to collect dirt and water, which can shade the lowest row of cells.

A tilt in the 10 to 15 degree range offers a reasonable balance, but panels still need regular cleaning. See our guide to solar panel cleaning.

Facing west for afternoon demand?

Some people ask whether panels should face west, because their consumption peaks in the afternoon and evening. Facing west shifts production slightly later in the day but reduces the year's total output compared with facing south. Under net metering, the credit for daytime surplus generally offsets evening imports, so maximising total generation with south-facing panels is usually the better choice. A west-facing array makes sense mainly where the roof gives no better option.

How tilt affects installation cost

The tilt decision has direct cost implications:

• taller rear legs for steeper tilts mean more steel;
• higher wind loads need stronger members and fixings;
• wider row spacing may reduce the number of panels that fit, raising the cost per unit of energy produced.

The 10 to 15 degree tilt we use on flat roofs is part of what keeps structures strong and costs reasonable, while losing very little energy compared with the theoretical optimum.

A worked example

Imagine a flat roof in Hyderabad with space for two rows of panels:

• At a steep tilt near latitude, the rows must be spaced well apart to avoid winter shading, so fewer panels fit.
• At 10 to 15 degrees, shadows are shorter, the rows can sit closer, and more panels fit on the same roof.

Even though each panel at the lower tilt produces slightly less per year than one at the theoretical optimum, the extra panels usually more than make up for it. The result is more total energy from the same roof, with a stronger, lower-wind-load structure.

Hyderabad and Anantapur compared

The two cities are not far apart in latitude, so the basic guidance is the same: face south and use a modest tilt. A few practical differences:

• Anantapur's lower latitude puts the 10 to 15 degree tilt range very close to the theoretical optimum.
• Hyderabad's denser buildings mean more shade from neighbouring structures, water tanks and lift rooms, so shade mapping deserves extra care.
• Dust levels in parts of both areas are high, which makes tilt and regular cleaning work together.

The generation figures we quote, about 1,550 to 1,600 units per kW per year, come from our installations in the Anantapur region. Hyderabad systems should be in a similar range, with shade being the most common reason for lower output.

Frequently asked questions

Which direction should solar panels face in India? In India, solar panels should face south, or as close to south as the roof allows, because the sun travels across the southern sky through the year. East- and west-facing panels still work, with somewhat lower annual output. North-facing panels should generally be avoided at our latitudes.

What is the best tilt angle for solar panels in Hyderabad? The theoretical optimum tilt for fixed solar panels in Hyderabad is close to its latitude, about 17 degrees. On flat roofs, many installers, including Origian, use 10 to 15 degrees to reduce wind load and row spacing while losing very little energy over the year.

What is the best solar panel tilt angle in Anantapur? Anantapur's latitude is about 14 to 15 degrees North, so a solar panel tilt of around 10 to 15 degrees is close to the optimum there, while keeping wind load and structure height manageable. Facing the panels south matters more than the last few degrees of tilt.

Should I change my solar panel tilt by season? For rooftop solar, usually not. Seasonal adjustment gains a little energy, but adjustable structures cost more, can loosen, and need someone to climb up and adjust them safely. Keeping panels clean and unshaded gives a bigger, cheaper gain. Fixed structures at a sensible tilt are the practical choice.

Do east-west facing solar panels work? Yes. East-west solar panels produce somewhat less over the year than south-facing ones, but they spread generation across the morning and afternoon and can make good use of a roof that runs east-west. With net metering, total yearly units usually matter more than the timing of generation.

How much roof space is needed for a 3 kW rooftop solar system? The roof area needed for a 3 kW rooftop solar system depends on panel wattage, tilt, row spacing and obstructions such as tanks and parapets. Origian's roof area to kW calculator gives a first estimate from your roof size, and a site survey confirms the layout and the shade-free area.

Does shade matter more than tilt for solar panels? Yes. Shade on part of one solar panel can reduce the output of others in the same string, costing far more energy than a few degrees of tilt. Map the shade from tanks, parapets and neighbouring buildings, including long winter shadows, before choosing where the panels go.