Most agrivoltaics projects in India fail on paper before they fail in the field. The layout is drawn like a normal ground mount, then lifted by two metres. Nobody checks the tractor turning circle, the pile moment, or how deep the plough cuts.
This guide is for the Indian EPC or developer asked to quote a raised, farm-compatible array. It covers the engineering decisions that change cost and risk. If you are choosing tools rather than engineering a site, read our agrivoltaic design software guide instead.
Quick answer. Agrivoltaics in India means building a solar plant that leaves the land farmable. Engineering starts with the farm. Set clear height from the tallest machine and row pitch from implement width. Then size piles for the larger overturning moment that height creates. India has no notified national agri-PV height standard as of October 2026, so document every assumption against IS 875 (Part 3):2015 and the scheme rules.
TL;DR
- Clear height and row pitch come from the farmer's machinery and crop, measured on site.
- Raising the array barely changes IS 875 design wind speed below 10 m, but it multiplies the moment at the pile.
- Bury DC cables below the plough depth and mark them. Tillage damage is a real failure mode.
- PM-KUSUM Component A allows stilt-mounted plants of 500 kW to 2 MW. The proposed 10 GW agri-PV component was not yet notified when we checked.
What does agrivoltaics in India mean for the design brief?
An agrivoltaic plant has two clients: the power buyer and the farmer. A standard ground mount optimises only for energy per acre. An agri-PV plant must also keep the land workable, which changes the structure, the layout and the cable plan.
In India the most common route is PM-KUSUM. The Ministry of New and Renewable Energy (MNRE) guidelines describe Component A as “10,000 MW of Decentralized Ground/ Stilt Mounted Grid Connected Solar” plants. Each is 500 kW to 2 MW, preferably within 5 km of a substation (MNRE PM-KUSUM guidelines, 2024). The PM-KUSUM Component A explainer covers the commercial side.
The guidelines name the stilt option but give no height or spacing figure. That gap lands on the design engineer.
Is there an Indian agrivoltaics standard?
Not yet at national level. In March 2026, Union Minister Pralhad Joshi said the next phase of PM-KUSUM would include a dedicated 10 GW agri-PV component (Energetica India, 2026). We found no notified 2.0 guidelines with height or spacing rules as of 6 October 2026. Check mnre.gov.in before you freeze a design.
The most cited reference abroad is Germany’s DIN SPEC 91434. It defines Category I overhead systems with at least 2.1 m clearance and no more than 10 percent land lost to structures. Farm yield should stay at or above 66 percent of a reference yield (Fraunhofer ISE and partners, Current legal framework for agrivoltaics in Germany).
DIN SPEC 91434 is not binding in India. It is still a useful, citable yardstick when a lender or state agency asks how you defined “farmable”.
How do you set clear height and row pitch?
Start with a site visit and a tape measure. Ask the farmer what runs on the land in each season, and record the tallest and widest machine.
| Design input | Where it comes from | What it controls |
|---|---|---|
| Tallest machine plus load (m) | Farmer interview, machine spec | Minimum clear height under the module edge |
| Implement width (m) | Rotavator, sprayer, harvester header | Clear width between post lines |
| Turning space at row ends (m) | Tractor turning circle | Headland width, fence offset |
| Crop height at harvest (m) | Crop calendar | Height for overhead designs |
| Crop shade tolerance | Agronomist or KVK advice | Ground coverage ratio (GCR) |
| Irrigation method | Drip, flood, sprinkler | Post spacing, cable routing, water on modules |
Design to the module’s lowest edge at its worst tilt, not to the torque tube or rafter. On a fixed-tilt table, the low edge sets the clearance. On a tracker, check the edge at maximum rotation.
Row pitch then follows two rules. It must be wider than the implement plus a working margin, and it must deliver the GCR the crop can tolerate. A ground coverage ratio that maximises energy will usually shade too much for most field crops.
Field tip. Write the governing machine and its dimensions on the general arrangement drawing. When the farmer buys a bigger tractor in year five, the record shows what the plant was designed for.
Two layout families: overhead and interspace
Indian agri-PV projects fall into two families. Each has a different cost driver.
| Feature | Overhead (raised) | Interspace (between rows) |
|---|---|---|
| Farming area | Under and between modules | Strips between rows |
| Typical structure | Tall posts, long spans | Near-standard mounts, wide pitch |
| Steel per MW | Highest | Close to a normal ground mount |
| Pile moment | Governs design | Similar to a standard plant |
| Best fit | Shade-tolerant crops, small machines | Field crops, larger machines |
| Land per MW | Close to standard | Higher, because pitch is wide |
Interspace layouts are often the cheaper first project. Overhead layouts suit horticulture and nurseries, where shade helps the crop. Pick the family before you price steel.
How does height change wind load and foundations?
This is the step most quotes get wrong. Raising the array does not raise the design wind pressure much, but it raises the force on the foundation a lot.
Under IS 875 (Part 3):2015, design wind speed is Vz = Vb × k1 × k2 × k3 × k4. Pressure is pz = 0.6 Vz² (Bentley STAAD.Pro help, IS 875 Part 3 dialog).
The height factor k2 in Table 2 starts at 10 m, and designers normally apply the 10 m value to lower structures. So a module at 4 m usually takes the same k2 as one at 1.5 m.
The lever arm is what changes. Overturning moment at the pile head is roughly the horizontal wind force times its height above ground.
| Case | Horizontal force per post (kN) | Height of force (m) | Moment at ground (kN·m) |
|---|---|---|---|
| Standard ground mount | 4.0 | 1.5 | 6.0 |
| Interspace agri-PV | 4.0 | 2.0 | 8.0 |
| Overhead agri-PV | 4.0 | 4.0 | 16.0 |
Illustrative arithmetic with the same force, to show the effect of height alone. Real forces come from the site calculation.
The overhead case carries about 2.7 times the ground moment of the standard mount. That flows into a heavier post, deeper embedment and often a different pile type. Our pile foundation design guide covers pile selection from soil data. For the wind method in full, see IS 875 Part 3 wind load for solar.
Two more checks matter on tall structures:
- Deflection and vibration. A tall, slender post sways more. Check serviceability, not only strength.
- Bracing that blocks machines. Diagonal braces are cheap steel, but they cut the clear width. Moment frames cost more and keep the field open.
What changes in the electrical and cable design?
The electrical design follows normal practice, with three farm-specific changes.
- Cable depth. Ask the farmer how deep they plough or subsoil. Bury DC and AC cables below that depth, in conduit where tillage crosses them, and mark the routes on the ground.
- Cable routing. Run cables along post lines, not across the cultivated strips. Every crossing is a future dig-in risk.
- Inverter and combiner placement. Put inverters and combiner boxes at headlands, away from irrigation spray and machine paths.
Earthing needs the same care. Earth pits and strips must sit where tillage will not cut them. Document the earthing layout on the IFC drawings so the next contractor can find it.
For Indian grid-connected plants, the CEIG approval process still applies to the electrical installation. A raised structure does not change that route.
Which modules suit agri-PV?
Module choice follows the light the crop needs. Bifacial modules on tall structures can gain rear-side energy, because more reflected light reaches the back. The gain depends on ground cover, which changes with the crop season.
Model that seasonal albedo honestly. A bare-soil albedo in summer and a green-crop albedo in monsoon give different rear gains. Our PVsyst bifacial gain tutorial shows how to set it up, and the albedo glossary entry defines the input.
Procurement rules also apply. For projects commissioned from 1 June 2026 under net-metering or open access, MNRE requires ALMM List-I modules made with List-II cells (Energetica India, 2025). Confirm the ALMM position for your scheme before you lock the module.
Agri-PV design checklist for Indian projects
Use this list at the start of every agri-PV quote. Each line is a decision that changes steel, cost or approval risk.
- Record the governing machine, crop calendar and irrigation method on site.
- Choose overhead or interspace before pricing steel.
- Set clear height at the module low edge, worst tilt.
- Set row pitch from implement width and crop shade tolerance.
- Run IS 875 (Part 3):2015 wind loads with the real structure height.
- Size posts and piles for the higher overturning moment, from a soil report.
- Route cables on post lines, below plough depth, in marked conduit.
- Model seasonal albedo for bifacial yield.
- Check scheme rules and ALMM status on the day of design freeze.
- Write every farm assumption on the drawings.
How Heaven Designs helps
Agri-PV is a structural problem first. Our team prepares layouts, wind calculations and pile design for raised arrays through the solar ground mount design service. Separate structural reports are available through civil and structural engineering.
We do not give agronomy advice, and we do not promise scheme approval. Your DISCOM, state nodal agency and agronomist decide those. What we provide is a design record that shows every height, spacing and load assumption.
To see the format first, download design samples. To discuss a site, request a project quote. We reply within 1 business day.
FAQ
What is the minimum height for agrivoltaics in India?
There is no notified national minimum as of October 2026. PM-KUSUM Component A allows stilt-mounted plants but gives no height. Many designers use Germany’s DIN SPEC 91434 figure of 2.1 m as a reference for overhead systems, then raise it to suit the farm’s tallest machine.
Does a raised array need a different wind calculation?
The method is the same IS 875 (Part 3):2015 calculation. Below 10 m, the height factor k2 does not change much, if at all. The overturning moment at the foundation does change, because the force acts higher up. That is why pile design changes.
Can farmers use tractors under an agrivoltaic plant?
Yes, if the plant is designed for it. Clear height, clear width between posts and headland space must come from the actual machine. Bracing placement and cable depth also decide whether the machine can work safely.
Is agri-PV more expensive than a normal ground mount?
Overhead designs usually need more steel per MW, because posts are taller and moments are higher. Interspace designs use near-standard structures but more land per MW. The cost gap depends on the layout family and the soil, so price it from a site-specific design.
Do agrivoltaic plants qualify under PM-KUSUM?
Component A covers ground and stilt-mounted plants by farmers on their land, from 500 kW to 2 MW. Eligibility, tariff and capacity depend on the DISCOM’s notification for each substation. Verify with your DISCOM or state agency before you invest in design.