Every string of your solar. Every watt of your energy.

The problem of underperformance

Solar systems rarely fail loudly. They bleed output slowly — through a dead string, a derating inverter, or a month of Lahore dust — while the plant total still reads “normal”. On the systems we monitor in Pakistan, the losses are not theoretical: they are measured, and they are large. Every unit lost is bought back from the grid at a premium, and under 2026 net billing a self-consumed unit is worth more than ever.

61%

of monitored inverters had a dead string or went silent in 60 days

4.8 vs 2.3

best vs worst daily yield (kWh/kWp/day) — the same sun, less than half the output

+31%

output recovered when a single dead string was found and fixed

98%

uptime across the systems we monitor — the other 2% seen the day it happens

Measured on our own platform over 60 days, stated conservatively. No modelled baselines, no invented figures.

What the platform does

Soiling intelligence, real-time fault detection, and honest loss attribution — so you act before the losses compound.

• Know when cleaning pays

  We track the output your soiling is quietly costing you — so you clean when it makes financial sense, not on a fixed calendar. Your AMC crew does the cleaning; the data decides the timing.

• Catch faults before they hurt

  Real-time, string-level fault detection: a dead or weak string is spotted in the next polling window and raised as a verified case in minutes — long before the loss shows up on your bill.

• Know what you’re losing, and why

  We do not just flag underperformance — we quantify each loss and attribute the cause: a dead string, a derating inverter, soiling, or a comms drop. You see exactly where the output went.

How it works

1. 1

   Onboard your sites

   Give us your inverter details and we onboard every site and every brand into one platform, and tune your monitoring. No new hardware or sensors — we work with the equipment you already own.

2. 2

   AI diagnostics, verified by engineers

   Our platform analyses your assets in real time — detecting faults, quantifying losses, and attributing causes down to the individual string. AI flags and prioritises; solar engineers verify each issue before you hear about it.

3. 3

   Act on insight

   You receive clear, prioritised recommendations so your team targets the highest-value fixes first — and recovers output. With an AMC, our engineers do the fixing and cleaning too.

Solar monitoring, your questions

What is string-level solar monitoring?

It watches each panel string on its own, not just the total at the meter. A system can read fine overall while one string is dead — so we see the loss the meter hides. Across the systems we monitor, 61% of inverters had a dead string or went silent within 60 days while their owners’ apps showed a working plant.

How is this different from the app my installer gave me?

Most installer apps show a single production number and only raise an alarm when a whole inverter stops. We are independent of the installer, read at the string level, and verify every alert with a solar engineer before you hear about it — so you get ranked actions, not a wall of noise. We cut alert noise by 76%.

Do you work with my inverter brand?

Yes — the platform is multi-brand and reads Huawei, Solis, Growatt, Sungrow, Canadian Solar, Solarman, GoodWe and more onto one screen. It connects to the equipment you already own, with no lock-in.

Do I have to replace anything to be monitored?

No. We onboard your existing systems — no rip-and-replace. Monitoring reads the equipment already installed, so you keep your inverters and get string-level visibility on top.

What does the monitoring actually catch?

Dead strings, silent inverters and underperforming strings that we detect ourselves, plus the inverter’s own faults it surfaces (insulation, fan alarm, phase fault, grid loss, PID, earth leakage, reverse connection). Fixing a single dead string on one inverter returned +31% output on it.

Is this only for solar, or my whole electricity bill?

Both. Solar Performance Cloud watches the solar at string level; WattEY gives full electricity visibility across grid, generator and solar, so you see where every watt — and every rupee — goes across the whole site.

Who verifies the alerts and stands behind the engineering?

Solar engineers verify every alert — the AI recommends, people decide. The platform is built and overseen by Engr. Reyyan Niaz Khan, BijliBachao’s founder and energy systems consultant, a UET Lahore electrical engineer and the pioneer of digital energy auditing in Pakistan.

How much does solar monitoring cost in Pakistan?

Monitoring is priced per site, based on system size and the number of inverters — not a fixed retail price, because a 50 kW rooftop and a 2 MW plant are not the same job. We onboard one real site so you can see it working first, then quote. In practice the recovered output pays for it: fixing a single dead string returned +31% on that inverter.

How quickly do you detect a fault?

A dead or weak string is spotted in the next polling window and raised as an engineer-verified case in minutes — long before it shows on your bill. Across the systems we monitor we hold 98% uptime, and the other 2% is seen the day it happens, not at the next site visit.

Does solar monitoring matter under 2026 net billing?

More than ever. Under net billing a unit you self-consume is worth more than a unit you export, so every unit lost to a dead string or soiling is bought back from the grid at a premium. Monitoring protects the self-consumption your payback now depends on — WattEY also shows which source served each load so you can shift more consumption onto solar.

Explore the rest of the platform