On-site electrolysers, owned and run for you, for plants that anneal metal
TL;DR Annealwell puts a small electrolyser inside mid-size metal plants that anneal stainless strip, tube or wire with hydrogen, and then owns and runs it. The plant pays per kilogram of hydrogen on a multi-year contract, spends nothing upfront and cuts most of its cylinder or tube-trailer deliveries.
Bright annealing and similar heat treatment need a protective hydrogen atmosphere, and big steelmakers have started making their own. One big stainless steelmaker ordered a plant producing about 0.47 KTPA for its bright annealing line and bell furnace in 2025[1].
Smaller tube, wire and powder-metal plants can't justify that. So they buy hydrogen by truck and live with the trucking bill, the safety handling and the odd late delivery. One electrolyser maker claims delivered hydrogen can cost up to 70% more than making it on site[2]. That's a company talking about its own product though, so check it against real invoices.
What it does, in regulatory terms: on-site production and storage of a flammable compressed gas. Hydrogen storage and cylinders fall under PESO rules, and you need site approvals before commissioning. Annealwell makes no carbon-credit or emissions claim unless it is independently verified.
Here's how it works - Annealwell surveys a plant's hydrogen use and installs a containerised electrolyser sized to its base load, with a small buffer store. The old cylinder supply stays hooked up as backup. Annealwell owns the kit, watches it remotely and services it, and the plant signs a five-to-seven-year offtake contract priced per kilogram, ideally at or below what it pays for delivered gas today.
Power cost decides everything. If the plant has rooftop solar or can buy renewable power through open access then the hydrogen can be green and cheaper. If it pays full grid tariffs then the numbers may not work, and Annealwell should walk away.
The plant owner or works manager pays from the operating budget, the same line that buys gas today. You want plants running continuous furnaces that spend enough on hydrogen to care, which means stainless tube and strip, precision wire, powder metallurgy and lab-grown diamond growers. I found no public price for cylinder hydrogen in India, so collect real invoices first.
The National Green Hydrogen Mission set aside ₹17,490 crore under SIGHT for electrolyser manufacturing and green hydrogen production up to 2029-30[3]. Indian electrolyser makers are shipping too. One supplier promised that steelmaker delivery within six months[1], and a small-electrolyser startup raised US$5M (about ₹4.8 Cr) in October 2025 for small modular units[2].
Nobody publishes a figure for hydrogen sold to small industrial users in India. The narrow signal is that annealing lines are already switching at large scale[1] and that investors are funding small on-site units aimed at labs, chemicals and diamond growers[2]. The mission outlay of ₹19,744 crore is adjacent context, not your market[3].
Indian electrolyser makers sell plants to large steel users[4]. Startups sell small modular AEM electrolysers from 1 kW to 100 kW[2]. Industrial gas companies already supply cylinders and trailers.
As far as I could find, none of them sells hydrogen by the kilogram from equipment it owns at the customer's site. That's the gap - a pay-per-kilogram service for mid-size plants that want neither the capex nor the headache.
| Difficulty | Hard (61/100) |
| Starting capital | ₹8–15 Cr |
| Time to launch | 12–18 months |
This is a capital-heavy service business. Every site needs equipment on your balance sheet, safety approvals and a power deal that makes the price work. You also carry uptime risk, because if the electrolyser stops then the plant's furnace stops, so keep the cylinder backup connected.
Yes, this needs real approvals. Storing compressed hydrogen at a customer's plant is regulated.
Building this outside India? The categories above usually have a local equivalent, so check with your own regulator.
Don't trust AI with safety interlocks or gas-leak response. Those stay hard-wired and follow the approved safety design.
Want to work out the AI layer for Annealwell? Talk to Yash →
This suits a founder with industrial gas or process-plant experience and access to project finance. If you're a software founder then I'd skip it, honestly. Prove one thing first - a signed offtake price at or below what one plant pays for delivered hydrogen, with the power source named.
Plan for roughly ₹8–15 Cr, because every site needs an electrolyser and storage on your own balance sheet.
Yes. Hydrogen storage falls under PESO rules, and each site needs fire and factory sign-off. Confirm the exact licences for your storage size.
Yes, annealing plants use hydrogen everywhere. Power prices decide the economics, so check local tariffs and gas safety rules first.
The free Annealwell validation kit has the line-by-line capital breakdown, the effort scoring, the PESO and power checklist, a 14-day validation sprint with pass/fail targets, a 90-day launch plan, 10 interview questions for plant managers, and 5 assumptions to test. Download the kit →
Thinking about building Annealwell or something close to it? The make-or-break work is a power deal that lets on-site hydrogen beat the delivered price, and that's the sort of thing I help founders work through. 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.