Solar pumps on trailers, booked by the hour by farmers the subsidy misses
TL;DR Pumpwheel parks a solar pump on a trailer at a farmer's borewell or canal, runs it for the hours booked, and moves on. Farmers prepay by the hour, so there is no loan and no pump to own. It aims at small, leased and scattered plots that the government pump subsidy rarely reaches.
Most Indian farmers are smallholders, and one estimate puts it at 86% of about 146 million cultivators[1]. Where there's no grid connection a lot of them run on diesel. A 2013 report found a 3 HP diesel pump burned about a litre an hour and cost roughly ₹80,000 a year to run at five hours a day[2].
The government's answer is PM-KUSUM, which targets 14 lakh standalone solar pumps, and by September 2025 about 9.03 lakh were in[3]. But a subsidised pump is stuck to one owner's land. Farmers who lease, farm several tiny plots or can't raise their share are left buying diesel.
Pumpwheel keeps a fleet of solar pumps on tractor trailers, each with fold-out panels. A farmer books a slot by phone or chat app and prepays with UPI, and a crew brings the unit to the water source, sets it up and runs it for the hours paid. One unit can serve several farmers a day in the same cluster during the sowing and dry-spell weeks when water matters most.
Booking data shows which villages and weeks fill up, so units go where the demand is. Off season they can work for dairy farms or nurseries.
The seed proposed pay-as-you-grow financing so farmers could own solar irrigation, and we reframed it. Where a farmer can own a pump, the government subsidy beats any private loan hands down. The open gap is the farmer who can't own one, so Pumpwheel rents out hours instead.
The farmer pays directly, by the hour. A 2016 pilot by a solar-irrigation company in Bihar charged ₹120–180 an hour for a trolley pump on a rented tractor[4]. Diesel is the price to beat - farm diesel power then cost about ₹20–22 a unit against ₹8–10 for off-grid solar[4]. FPOs are a second channel, buying blocks of hours for members and collecting through their own accounts.
The subsidy has reached about 9 lakh farmers but stalled short of its target, and some states recorded no installations at all[3]. The wider scheme has been extended to March 2027[5], which keeps fixed pumps going to owner-farmers and leaves renters out in the cold. Panel prices have fallen a long way since the 2016 pilots, so a portable unit costs less to build.
There's no public figure for solar pump rental in India. The narrowest signal is the gap between the 14 lakh pump target and 9.03 lakh installed[3], plus the much bigger pool of farmers who will never own a pump. That company expected ₹5,000–6,000 a month per rented pump in 2016[4]. Treat that as an old benchmark to beat and not a forecast.
A solar-irrigation company ran pay-per-use trolley pumps in Bihar and solarised 34 community tubewells with the state's minor irrigation department, though faulty pipes caused trouble in that pilot[2][4]. We couldn't confirm the rental service still runs. An agritech startup sells net houses to smallholders in Bihar and other states but not pump hours[6]. What's missing is a dense, well-run rental fleet in a few districts, priced against diesel.
| Difficulty | Moderate (43/100) |
| Starting capital | ₹1.6–2.5 Cr |
| Time to launch | 6–9 months |
The hardware is simple. Utilisation is the hard part. Demand bunches into a few weeks, so units sit idle between seasons unless you find them other work. Then there's routing crews over muddy roads, stopping theft and collecting cash from farmers who'd rather pay later, and it all adds up.
No licence for the pump service itself, because you rent equipment and labour and don't sell electricity.
Building this outside India? The categories above usually have a local equivalent, so check with your own regulator.
Don't trust a model on groundwater limits or how much a farmer should pump. Those depend on local rules and agronomy, not booking data.
Want to work out the AI layer for Pumpwheel? Talk to Yash →
This is a field-operations business, and I'd back a founder who has run tractor or equipment rental in one district. If you want an app-led play then it's a poor fit. Prove one number first - 600 or more paid hours per unit in year one in a single cluster.
Plan for roughly ₹1.6–2.5 Cr for the trailer fleet, crews and depots. Start in one cluster to keep units busy.
No sector licence, since you rent equipment and don't sell power. You need company registration, GST, DPDP compliance and a check of state groundwater rules.
Yes, wherever smallholders pump water with diesel. Check local water extraction rules and tax on equipment rental first.
The free Pumpwheel validation kit has the line-by-line capital breakdown, the effort scoring, the groundwater and tax checklist, a 14-day validation sprint with pass/fail targets, a 90-day launch plan, 10 interview questions for farmers and FPOs, and 5 assumptions to test. Download the kit →
Thinking about building Pumpwheel or something close to it? The make-or-break work is keeping each unit busy outside the peak irrigation weeks, and I'm happy to work through that with you. If you need a hand, you know where to find me. Talk to Yash →
For illustration only. Names are fictional and ideas hypothetical; sourced facts are real but may be out of date. Nothing here is legal, financial or professional advice, and Yash Khatri is not personally liable for any use of it. Read the full disclaimer.