--- title: "Wattey Energy" headline: "Wattey Energy (BijliBachao.pk) energy products" description: "Ali Ahmed designed and built Wattey Energy’s five energy products (formerly BijliBachao.pk): WattEY, STS, Metering, Sub-Billing and Solar Performance Cloud." canonical_url: https://alioahmed.com/work/bijli-bachao type: case-study role: "Head of Energy Systems & Product Engineering" date_label: "October 2025 – present" status: live date_modified: 2026-10-27 author: name: "Ali Ahmed" url: https://alioahmed.com/ orcid: https://orcid.org/0009-0007-4265-3295 key_figures: - "1.92 GWh net electricity measured by WattEY" - "906 panel strings monitored by Solar Performance Cloud" - "668/668 WattEY Metering readings with a meter photo" - "265-bed hostel billed by WattEY Sub-Billing" entities: - name: "Wattey Energy" type: Organization url: https://watteyenergy.pk/ same_as: - https://bijlibachao.pk/ - name: "Reyyan Niaz Khan" type: Person url: https://watteyenergy.pk/team/reyyan-niaz-khan - name: "WattEY" type: SoftwareApplication url: https://wattey.bijlibachao.pk/ - name: "WattEY STS" type: SoftwareApplication - name: "WattEY Metering" type: SoftwareApplication - name: "WattEY Sub-Billing" type: SoftwareApplication - name: "Solar Performance Cloud" type: SoftwareApplication url: https://spc.bijlibachao.pk/ - name: "IEC 61724-1:2017 — Photovoltaic system performance, Part 1: Monitoring" type: DefinedTerm url: https://webstore.iec.ch/en/publication/33622 - name: "IEC 62446-1:2016 — Photovoltaic (PV) systems: requirements for testing, documentation and maintenance, Part 1" type: DefinedTerm url: https://webstore.iec.ch/en/publication/24057 person_same_as: - https://www.linkedin.com/in/alioahmed/ - https://github.com/alioahmed - https://orcid.org/0009-0007-4265-3295 - https://x.com/Alioahmed_ - https://about.me/alioahmed - https://dev.to/alioahmed - https://medium.com/@alioahmed - https://hashnode.com/@alioahmed - https://substack.com/@alioahmed - https://huggingface.co/alioahmed - https://bsky.app/profile/alioahmed.bsky.social - https://mastodon.social/@alioahmed - https://www.kaggle.com/alioahmed - https://www.producthunt.com/@alioahmed - https://www.patreon.com/cw/alioahmed - https://www.goodreads.com/user/show/202106301-ali-ahmed - https://fueler.io/alioahmed - https://gitlab.com/alioahmed - https://linktr.ee/alioahmed - https://topmate.io/alioahmed related: - https://alioahmed.com/work/wattey - https://alioahmed.com/work/solar-performance-cloud - https://alioahmed.com/work/sts - https://alioahmed.com/work/wattey-metering - https://alioahmed.com/work/electricity-sub-billing full_corpus: https://alioahmed.com/llms-full.txt site_index: https://alioahmed.com/llms.txt --- # Wattey Energy > Ali Ahmed is Head of Energy Systems & Product Engineering at Wattey Energy (formerly BijliBachao.pk), a Lahore energy company founded in 2018 by Engr. Reyyan Niaz Khan. Since October 2025 he has designed and built its five energy products (WattEY, WattEY STS, WattEY Metering, WattEY Sub-Billing and Solar Performance Cloud) and the company website. By 25 August 2026, WattEY had measured 1.92 GWh of net electricity for 19 organisations, and Solar Performance Cloud was monitoring 906 panel strings at 94 sites. **Canonical URL:** https://alioahmed.com/work/bijli-bachao **Role:** Head of Energy Systems & Product Engineering — October 2025 – present **Summary:** Ali Ahmed designed and built Wattey Energy’s five energy products (formerly BijliBachao.pk): WattEY, STS, Metering, Sub-Billing and Solar Performance Cloud. ## Key figures - **1.92 GWh** — net electricity measured by WattEY - **906** — panel strings monitored by Solar Performance Cloud - **668/668** — WattEY Metering readings with a meter photo - **265-bed** — hostel billed by WattEY Sub-Billing ### Every unit of electricity, measured and proven. Building software for the way energy works in the real world. Electricity monitoring, solar inspection, solar/grid switching and photo-verified billing for factories, malls, hostels and solar plants across Pakistan. Product: Strategy, customer problems, business outcomes · Engineering: Architecture, technical depth, complex systems · Builder / operator: I lead the product and take it into production ### The difficult part begins after installation. Energy infrastructure does more than generate electricity. It needs to be monitored, inspected, controlled and accounted for throughout its operating life. Across real installations, the challenge is making equipment data, physical operations and commercial workflows work together so the people responsible for these systems can make informed decisions. This is the operating reality behind the products I built at Wattey Energy (formerly BijliBachao.pk). Asset visibility: Is the system actually performing as it should? Disconnected energy data: Grid, solar, generator and billing data rarely live together. Operational control: Some actions still depend on physical equipment and manual coordination. Electricity accounting: Shared sites need billing workflows that are traceable and defensible. ### From physical infrastructure to dependable software. The next energy product needs more than a dashboard. Grid, solar, generator, switching and billing, engineered as one system: every unit measured, every switch confirmed, every bill traceable. - Grid (for factories, hotels and offices): Peak-hour units cost more. Every unit is split at the peak window that actually applies — it shifts four times a year, automatically. Metered import and export, peak and off-peak hours, read every 3 minutes. Built into WattEY. Rule: A missing signal is shown as a gap, never a fake zero. 1.92 GWh net electricity measured · 19 organisations. - Solar (for solar plants and EPC portfolios): A weak panel string quietly loses generation you already paid for. Find it string by string, whatever the inverter brand. Every panel string compared with its neighbours, across 7 inverter cloud platforms. Built into Solar Performance Cloud and WattEY. Rule: Strings are judged against their neighbours, not by a brand’s own app. 906 panel strings checked · 94 sites. - Generator (for sites with backup generators): Generator hours and units, kept separate from grid units, without fitting a fuel sensor. Generator runtime and energy separated from grid energy, automatically. Built into WattEY. Rule: Detected from the meter itself, with no fuel sensor. 1,892 kWh generator energy kept apart from grid energy. - Controls (for sites mixing solar and grid): Run on solar first and fall back to grid, and know the switch really happened. Switching between solar and grid, from a phone or on a schedule. Built into WattEY STS. Rule: A switch counts only when the device confirms it. Live device-confirmed switching. - Billing (for malls, plazas and hostels): Every tenant can check their bill against the photo of their own meter. Tenant and resident bills from photographed meter readings; residents billed by the days they stayed. Built into WattEY Metering and WattEY Sub-Billing. Rule: A closed month is locked; corrections are recorded, never silently changed. 668 / 668 readings with a meter photo. - A traceable energy record, from the meter to the bill. One Wattey Energy client makes clothing for global brands. They didn’t ask how their solar was performing; they asked how much carbon they had avoided, because their buyer wanted the figure. A renewable claim is only as good as the meter behind it. Useful for export supply chains: when a buyer asks where a factory’s electricity came from, the answer is already recorded — metered grid use, solar output string by string, generator runs and photo-backed readings. It is the record an accountant or verifier works from; the products do not calculate emissions. ### Wattey Energy clients using these platforms These are Wattey Energy’s clients. They use the platforms I designed and built. - Lahore Continental Hotel (WattEY) - Mall of Mureedkay (WattEY, WattEY Metering) - Al Haram Paper Mill (WattEY) - FANZ Spinning Mill (WattEY, SPC) - Amna Dyeing & Finishing (WattEY) - Qadir Engineering (WattEY) - Zahoor Dairy Farm (WattEY, SPC) - 5t Gulberg (WattEY) - Popular Sole (SPC) - Beco Steel (SPC) - Rehma Hostel (WattEY Sub-Billing) ### Which fits your site? - Factory, hotel or office: WattEY - Solar plant or EPC portfolio: Solar Performance Cloud - Switching between solar and grid: WattEY STS - Mall or plaza billing tenants: WattEY Metering - Hostel or shared rooms: WattEY Sub-Billing ### WattEY: Why did our electricity bill change? See where your electricity goes, every three minutes: peak hours, solar export and generator kept apart. Live since November 2025. 1.92 GWh of net electricity measured for 19 organisations in 5 cities (15 Nov 2025 – 25 August 2026). ### WattEY STS: Did the supply actually switch? Move between solar and grid from your phone or on a schedule, and know it happened, because the device confirms it. Live. A switch counts only when the device confirms it, not when the button is pressed (Smart Transfer Switch). ### WattEY Metering: Can we prove every tenant’s reading? Bill every shop from a photographed meter reading, with the photo printed on the tenant’s own bill. Live since 5 March 2026. 668 of 668 readings photographed · 5 billing cycles closed (March through July 2026 · snapshot 25 August 2026). ### WattEY Sub-Billing: Who pays what when residents come and go? Share each room’s electricity fairly by the days each resident stayed, with meter photos behind every bill. Live in its first building since Oct 2026. 265-bed hostel · 94 rooms · about 160 meters (October 2026). ### Solar Performance Cloud: Is my solar producing what it should? Find the panel strings that are quietly falling behind, across inverter brands, in one view. Live since 30 January 2026. 906 panel strings monitored at 94 sites · 7 inverter cloud platforms from 6 manufacturers (read 25 August 2026). ### Proof you can check. Claims are easy. These are the things anyone can look at. - A WattEY Metering bill from the product’s own bill generator. The tenant and amounts are fictional; the meter photographs are real. - WattEY production data (CC BY 4.0): net electricity, dated 25 August 2026 - Solar Performance Cloud data (CC BY 4.0): string-level solar health, read 25 August 2026 - Solar Performance Cloud is aligned to IEC 61724-1 (PV performance monitoring) and IEC 62446-1 (PV testing and documentation). Transfer-switch interlocking follows IEC 60947-6-1 on the Industrial STS variant only. ### How these figures are counted - WattEY: 1.92 GWh is net electricity (import minus export), not solar generation or money saved. 19 organisations; 43 meters. - Solar Performance Cloud: 906 strings reported live data in the 30-day window to 25 August 2026; 582 were scored on the settled day, 24 August 2026. Sites are monitored, not installed by Ali. - WattEY Metering: one shopping mall (Mall of Mureedkay): about 545 units in the building, 129 shops onboarded, about 111 meters billed monthly. - WattEY Sub-Billing: building scope as of October 2026; its first real billing month is in progress. - Figures from different products are never added together. ### For exporters: the energy records your buyers ask for. - WattEY: Metered grid electricity and recorded generator activity - Solar Performance Cloud: Solar generation records, string by string - WattEY Metering: Photo-backed meter readings - WattEY STS: Confirmed changes of supply source, where supported - These are energy records an accountant or verifier can work from. The products do not calculate emissions or issue certificates. ### What I owned, and how I build. - Oct 2025: Joined as Head of Energy Systems & Product Engineering - Nov 2025: WattEY live - Jan 2026: Solar Performance Cloud live - Mar 2026: WattEY Metering live - Oct 2026: WattEY Sub-Billing live in its first building - WattEY STS is also live. - Designed and built all five products, from the problem on the site floor to the screens people use. - Built the company website and two Android apps that read meters, including with no signal. - Published two open datasets so the figures can be checked. - Wattey Energy’s engineers handled installation, rollout and training at sites; I built the software they deploy. - A missing signal is not zero: When a meter or inverter goes quiet, the products show a gap, not a fake zero that looks like a failure. - A switch counts only when the device confirms it: Pressing “switch to solar” is a request. STS reports success only when the device says the supply changed. - A closed month can’t be quietly rewritten: Once a billing month closes, its readings and bills are locked. Corrections are recorded, not silently changed. - People leave mid-month: A resident who leaves on the 20th pays for the days they stayed, settled on the day they leave. - The BijliBachao.pk website: the company’s public site, built to be found by search and quoted by AI assistants - Two Android field apps: meter reading with photo evidence, offline-capable - Two open datasets: WattEY and Solar Performance Cloud, CC BY 4.0 - Each product sits in an established international category (energy monitoring, multi-brand solar monitoring, transfer switching, tenant sub-metering), so the work translates beyond Pakistan. - I’m open to senior energy-technology and product-engineering roles, and to well-defined partnerships. ### The hard parts, and what I decided. Any platform looks inevitable once it runs. These are the judgement calls that decided whether the numbers could be trusted, including the ones that only surfaced after the software was already in production. - There is no threshold that works (Solar Performance Cloud): The obvious way to catch a failing solar string is a rule: alert below this many amps. It does not work. The right value moves with the hour, the season, the weather, the panel model, the tilt and the age of the array, so every fixed threshold either screams all morning or misses the fault. What I chose: Grade each string against its own neighbours on the same inverter. Same weather, same hour, same hardware, so whatever is wrong with the day is wrong for all of them equally and cancels out. What is left is the string that is genuinely behind. What it cost: The method needs peers. It is strongest where there are strings to compare, and weakest where there are not. - False alarms before breakfast (Solar Performance Cloud): The first version of the alerting fired a flood of false critical alerts in the opening minutes of a single morning. The cause was dawn: strings on the same channel wake minutes apart, so for half an hour every one looks broken next to the one that woke first. What I chose: Treat the waking window as its own state. The alternative was lowering sensitivity, which would have bought silence at sunrise by hiding real faults for the rest of the day. What it cost: An operator who learns to ignore alerts has a worse instrument than no instrument at all. - The data arrives, and it is a lie (Solar Performance Cloud): Vendor clouds replay stale readings. At midnight you can be handed a bright sunny afternoon, complete with amps and kilowatts, while nothing is actually arriving. The dashboard shows a healthy plant. What I chose: Identify and refuse every replayed reading before it reaches a calculation. What it cost: When you compute money from a device you do not own and cannot trust, the integrity layer is the product. - Letting the product say “we don’t know” (WattEY · Solar Performance Cloud): The tempting thing is to always return a number. Below a coverage floor these platforms return no answer at all, and a yield figure is withheld entirely when the capacity it would divide by is not known. What I chose: “No data” is its own state and is never quietly folded into “abnormal”. WattEY shows every gap rather than filling it, and each one is visible. What it cost: A total can be correct while the story is wrong. An engineer shown the gap can act on it; one shown a confident average cannot. - A minus sign that decides the bill (WattEY): Under net metering the billable quantity is signed: import minus export, not import. When a roof sends more to the grid than the building draws, consumption for that hour is negative. What I chose: Carry the sign through the whole billing path, and compute the tariff window from the current season automatically rather than reading a configuration record somebody has to remember to update. What it cost: A platform that reports that hour as positive is not slightly off. It is wrong in the direction that costs the client money. - A press is a request, not a switch (WattEY STS): Pressing “switch to solar” sends a command. The actuator can fail, the device can be offline or the supply can be missing, and a button would still look done. What I chose: Report a switch complete only after the device reads the new source back from its own sensors, so a failed switch is surfaced instead of assumed. What it cost: Confirmation takes a moment longer than a button turning green. A switch that is reported but never happened is worse than a short wait. - A closed month cannot be quietly rewritten (WattEY Metering): After bills go out, someone always finds a reading to fix, and the easy fix is to edit the old number. What I chose: Close each month into a frozen, read-only snapshot. Corrections are appended and visible as corrections; reopening a month is recorded with who did it, and blocked outright where it could bill a tenant twice. What it cost: A mistake costs a recorded correction instead of a quiet edit. That is slower, and it is the point: a tenant can trust a bill that cannot change behind their back. ### The company and the people. Wattey Energy (formerly BijliBachao.pk) is a Pakistani energy company in Lahore, founded in 2018 by Engr. Reyyan Niaz Khan. It does solar, energy-audit and engineering-design work, and runs the energy products described on this page. “Bijli Bachao” is Urdu for “save electricity”. Not connected to Bijli Bachao in India (bijlibachao.com). The products belong to Wattey Energy, which runs customer operations. I lead energy systems and product engineering; I am not a founder of the company. Wattey Energy’s wider clients: solar, audits and engineering work: Nishat, Nishat Chunian, LUMS, LESCO, FWO, Government of Punjab, DHA Multan, Lahore Cantonment Board, Cooperative Model Town Society, Pakistan Oxygen, Warid, PIFD, WWF Pakistan & WCB, Kickstart, Daftarkhwan, COLABS, Al Kareem City, Bread & Beyond, Popcorn Studio, Duck Donuts, InstaPrint. Clients of the company’s wider work, not users of the software above. ### It was never really about electricity. Strip the kilowatts out of these five products and what is left is a pattern that shows up anywhere a business computes money from hardware it does not control. Readings arrive late, out of order, duplicated, or replayed from a day that already happened. One broken instrument poisons the readings around it. Two systems report two numbers and nobody can say which is real. And someone still has to sign an invoice at the end of the month. The engineering that answers that is the same in logistics and fleet data, in water and utility metering, in industrial IoT, and in payments and reconciliation: a single source of truth across multi-brand devices, built so an accountant can defend the output. The platforms are the proof. The method is the offer. - Replay gating: refuse a reading that already happened - Plausibility gating: reject the impossible before it is counted - Peer benchmarking: compare against neighbours, not a fixed threshold - Behaviour-based classification: read the device, not a config record - Coverage floors: return nothing rather than a confident guess - You have a version of this, and you are deciding whether to build it or rent it. Renting answers the question until the contract, the data model and the supported brands are someone else’s decision. Building answers it permanently, and keeps the system with the business. I have taken that second path to production, in one of the harder energy markets there is. ## FAQ ### Who built WattEY, WattEY STS, WattEY Metering, WattEY Sub-Billing and Solar Performance Cloud? Ali Ahmed, Head of Energy Systems & Product Engineering at Wattey Energy (formerly BijliBachao.pk) in Lahore, designed and built all five, plus the company website, starting in October 2025. Wattey Energy owns and operates the products. ### Which product fits my site? Factories, hotels and offices: WattEY. Solar plants and EPC portfolios: Solar Performance Cloud. Switching between solar and grid: WattEY STS. Malls and plazas billing tenants: WattEY Metering. Hostels and shared rooms: WattEY Sub-Billing. ### Are all five products live? Yes. WattEY has been live since November 2025, Solar Performance Cloud since 30 January 2026 and WattEY Metering since 5 March 2026; WattEY STS is live too. WattEY Sub-Billing has been live in its first building, Rehma Hostel, since October 2026, and its first real billing month is in progress. The figures on this page are dated snapshots, not live counters. ### How do the five products fit together? They cover the five layers of a site’s energy. WattEY measures grid use, solar export and generator runs; Solar Performance Cloud checks solar output string by string; WattEY STS switches between solar and grid; WattEY Metering and WattEY Sub-Billing turn photographed meter readings into bills. WattEY, STS, Metering and Sub-Billing form the WattEY family, and Solar Performance Cloud is a separate platform. Each is its own product, so a site uses the ones it needs. ### What engineering standards are they built to? Solar Performance Cloud is aligned to IEC 61724-1 (how PV performance is monitored) and IEC 62446-1 (PV testing and documentation); its fault categories use that standard’s test vocabulary. The alignment is partial and stated as such: it is not a certification, and the platform computes no performance ratio. On the Industrial STS variant, transfer-switch interlocking follows IEC 60947-6-1. ### How do I get a demo? Message Wattey Energy on WhatsApp at +92 323 4578775 for a free live demo of any of the five products. ### Which companies use these platforms? Wattey Energy’s clients use them at sites across Pakistan, including Lahore Continental Hotel, Mall of Mureedkay, Al Haram Paper Mill, FANZ Spinning Mill, Zahoor Dairy Farm, Popular Sole, Beco Steel and Rehma Hostel. They are clients of Wattey Energy (formerly BijliBachao.pk); Ali designed and built the platforms they use. ### Does it need equipment at my site? Usually, yes. WattEY reads meters the company installs, Solar Performance Cloud reads your inverters’ cloud data with a monitoring device the company installs at each plant, and STS is a switching device. The billing products read the building’s meters with an Android app. ### Does Solar Performance Cloud work with my inverter brand? It reads 7 inverter cloud platforms from 6 manufacturers, including Huawei, Sungrow, Growatt, Solis, Canadian Solar and GoodWe, and compares strings the same way across them. ### How is Solar Performance Cloud different from my inverter’s app? An inverter app reports what its own brand produced. Solar Performance Cloud compares each panel string with its neighbours across brands and flags what deserves an engineer’s attention. ### Can tenants check their electricity bill? Yes. Each WattEY Metering bill carries the photograph of the meter it was read from. In the 25 August 2026 snapshot, all 668 readings had a photo. ### How are hostel residents billed if they move in or out mid-month? WattEY Sub-Billing shares a room’s metered electricity by the dates each resident stayed. Rooms are metered, not individual people. ### Do these products calculate carbon emissions? No. They keep metered electricity, solar generation, generator activity and photo-backed readings that an accountant or verifier can work from. They do not calculate emissions or issue certificates. ### Can Ali build something similar for my organisation? Yes, as a new build scoped to your requirements. Wattey Energy’s products themselves are adopted through Wattey Energy, not licensed by Ali. ### What was Ali’s role, exactly? Ali leads energy systems and product engineering. He designed and built the products, the company website and the field apps; Wattey Energy’s engineers handled installation, rollout and training, and the company runs customer operations. ### What broke in production, and what changed because of it? Two lessons from Solar Performance Cloud shaped the design. At dawn, strings on the same inverter wake minutes apart, and the first alerting version raised a flood of false critical alerts one morning; the waking window is now its own state, so real faults are not hidden by simply lowering sensitivity. And inverter clouds replay old readings, so a plant can look healthy while nothing new arrives; every replayed reading is now refused before it reaches a calculation. ### How is a purpose-built platform different from buying an off-the-shelf energy product? Off-the-shelf platforms suit many teams. The difference is who owns the decisions. A bought platform brings its own idea of a site, the brands it supports and what a billing month means. A purpose-built one encodes what the business needs — Pakistan’s seasonal time-of-use windows, net-metering import and export kept separate, automatic generator detection, bills backed by meter photos — and the organisation keeps the system, the data and the roadmap. ### What can an investor or strategic partner assess? The products, the dated operating evidence on this page, the two open datasets, the engineering decisions behind them and the customer problems they address. It is a starting point for a conversation, not a claim of audited returns, recurring revenue or guaranteed savings, and not an offer of equity. ### Is Ali open to new roles or partnerships? Yes. Ali is open to senior energy-technology and product-engineering roles, and to well-defined partnerships. ### How current are the figures? Each figure carries its own date. Operating figures are from the 25 August 2026 snapshot, WattEY Sub-Billing figures are from October 2026, and the page shows when it was last updated. ### Is the data public? Yes. Two open datasets are published under CC BY 4.0: WattEY production data and Solar Performance Cloud performance data. Each is dated and explains its definitions. ### What is Wattey Energy? A Pakistani energy company in Lahore, formerly BijliBachao.pk, founded in 2018 by Engr. Reyyan Niaz Khan. It does solar, energy-audit and engineering-design work and runs its own energy products. ### Is this the same company as Bijli Bachao in India (bijlibachao.com)? No. Wattey Energy (formerly BijliBachao.pk) is a Pakistani company based in Lahore and is not connected to the Indian website. ### Who founded the company? Engr. Reyyan Niaz Khan (Energy Systems Consultant · Founder, BijliBachao.pk). Ali Ahmed leads energy systems and product engineering and is not a founder of the company. --- Rendered from the structured content at https://alioahmed.com/work/bijli-bachao. Facts trace to the canonical bio; render, don't reword.