Su-Kam Brainy Hybrid GTI: the grid-tie inverter that uses 100% of your solar — and still keeps the lights on

The film above is the single most-watched video on the entire Su-Kam channel — and there is a reason an inverter explainer crossed ninety thousand views. The Brainy Hybrid GTI answered the question every Indian solar buyer was quietly asking: if I put solar on my roof, what happens to my backup — and to all the power my panels make that I do not use?

1 Two old ways, and why each one fell short

Before this product, a buyer had to pick between two imperfect choices — and neither used solar to the full.

2 One box doing the work of three

The Brainy Hybrid GTI is what happens when you put an online UPS, a Solar Power Conditioning Unit and a grid-tie inverter into a single intelligent machine. It is part of the same Su-Kam thinking that, in my own words to pv magazine, produced “an intelligent Solar Hybrid inverter which works as both off-grid and on-grid inverter” — and the same conviction behind what we believed was the world’s first Hybrid UPS.

3 The brain: a 3-tier solar priority

What makes it “Brainy” is how it decides where every watt of solar goes. It follows a strict three-tier priority the moment the sun is shining:

4 How it actually cuts your bill

When surplus solar is exported, it does real work immediately: it can support heavy appliances — an air conditioner, a refrigerator — that are running directly on the mains. The net meter only draws the remaining deficit from the grid after your solar contribution has been maximised. Under an active net-metering policy, every exported unit becomes a credit on your bill.

5 A true UPS for sensitive electronics

Because there is an online UPS at its heart, the Brainy Hybrid GTI switches over with such a high-efficiency, near-seamless transfer that it is completely safe for the equipment that cannot tolerate even a flicker — servers, routers, modems, computers and printers — with no risk of data loss. That same intelligence shows up across the Brainy range: solar priority, intelligent charge-sharing, automatic temperature compensation (ATC) and powerful battery charging even at a low 90V.

• Runs servers & IT gear safely
• High-efficiency UPS switchover
• No data loss on transfer
• Intelligent charge-sharing
• Automatic Temperature Compensation
• Strong charging from low 90V

The wider Su-Kam grid-tie family was built for real Indian conditions too — engineered to keep working at very low input voltages and launched specifically to handle low voltage and erratic supply, with GSM remote monitoring so the system could be watched from anywhere in the world.

6 Why I built it for India

Net metering was only just arriving in India when we built this, and I said as much at the time: the slow progress of net metering in most states had dampened demand for pure on-grid systems. But I knew our market too well to sell a machine that died during a power cut — in most of India, backup is not a luxury, it is the whole point. So we refused to make people choose between bill savings and reliable backup. The Brainy Hybrid GTI gave them both, and wasted nothing in between.

“The product is a viable option not only for commercial establishments but also for home-owners if their state has an active net-metering policy and pays a good price to residents for feeding excess solar electricity back to the grid.”— Kunwer Sachdev, on the Su-Kam grid-tie launch (EQ Magazine, 2017)

7 India’s answer — tested the hard way, then stalled

I want to be honest about what this product really was. Solar that feeds the grid and stores power in a battery — the exact combination the whole world is talking about today, and that India now imports almost entirely from China — we had it, built and tested in India, years ago. This was our answer for India: grid-feed plus storage in one machine, designed for our broken grid, not Germany’s.

And we earned it the hard way. We did not ship it in volume on day one; we built and tested it in batches — well over a hundred units — sent them into real Indian homes and feeders, waited for the failure reports, and folded every single one back into the next revision. We kept the isolation transformer that the Chinese industry was busy abandoning, and we engineered it to lock onto a grid as low as the rural feeders we actually have, because our customers were never in Germany. We even field-tested it in Nigeria, on one of the most fragile grids on earth, and it held.

Then Su-Kam entered insolvency in 2018, and the project was stalled. The champion was gone, the export pipeline lost its planner, and the country quietly handed the market to China — which today holds a major and rising share of India’s inverter market. The technology was right. The timing, for the company, was not. You can see the company’s own history on Wikipedia.

It is the same conviction that runs through the rest of our solar range — from the Colossal 30 KVA and 40 KVA three-phase Solar PCUs up to the 80 KVA — and the story of how we turned the humble inverter into a full solar power plant. For the technical background, see net metering and grid-tie solar inverters.

8 Putting one in: the installation

We also made it straightforward to install. Here is the step-by-step installation of the Su-Kam Hybrid Grid Tie Inverter 1000, start to finish.

The top panel carries a printed wiring diagram showing the exact order of connections. Switch the system fully off before making any connection — then it goes in four steps.

The front panel keeps it simple: a single on/off power switch and an LCD screen giving real-time operating parameters and generation metrics — load, solar, battery, and what is being fed back to the grid.

9 A note from me

Of all the films we ever put out, this is the one people watched the most — and I think that tells you something. It was never really a video about an inverter. It was about a promise: that going solar in India did not have to mean sitting in the dark during a power cut, and that not a single ray of sunshine on your roof should be wasted. We packed a UPS, a Solar PCU and a grid-tie inverter into one machine, and gave it a brain to decide what to do with every watt — because that is what an Indian home actually needed, not what was easiest to build.