India’s First MPPT Was Built by Su-Kam — Under Kunwer Sachdev

Before imports owned the buzzword, Su-Kam designed and manufactured India’s first indigenous MPPT solar charge controllers under Kunwer Sachdev — turning a 100W panel’s wasted PWM harvest (~67W) into ~96W, winning technology patent protection, and launching the path to Solar PCUs and hybrids.

By Kunwer Sachdev · Su-Kam Founder Series, Part 06 · हिंदी: इस लेख का हिंदी संस्करण · Archive: solarmanofindia.com · Related: Part 05 — SOLARCON Retrofit · Part 04 — Static Bypass, DT-6S & ATC

Watch: Solar Charge Controller — MPPT vs PWM

When solar energy began gaining momentum across India, the market was dominated by standard PWM (Pulse Width Modulation) solar charge controllers. While PWM controllers were widely used, they suffered from a fundamental design flaw: they dragged down the voltage of the solar panels to match the battery voltage, dumping and wasting precious electrical wattage in the process. For example, out of 100W generated by a solar module, a PWM charger delivered only 67W to the battery — a heavy 33 Watt loss.

Recognizing that India needed vastly superior solar harvesting efficiency to make green energy practical and economical, Kunwer Sachdev led Su-Kam’s R&D teams to break new ground. Su-Kam proudly became the first company in India to design and manufacture advanced MPPT (Maximum Power Point Tracking) technology, filing official technology patents and permanently transforming the nation’s renewable energy sector.

1. Why Su-Kam Had to Invent MPPT First: PWM Was Wasting India’s Sun

Unlike traditional PWM chargers, an MPPT electronic system dynamically tracks the maximum power point of a photovoltaic module. By continuously optimizing voltage and current matching, it extracts every possible drop of energy and transfers it safely to the battery.

• The efficiency leap: While a PWM charger wasted over 30% of potential panel output (delivering only 67W from a 100W panel), Su-Kam’s MPPT charger delivered an impressive 96W from that exact same 100W panel, slashing power loss down to just 4 watts.
• Producing more with fewer panels: Because MPPT technology extracts up to 30% more power from solar arrays, users could achieve the same electrical output using fewer PV modules — saving thousands of rupees on initial installation costs.

Watch: What is an MPPT solar charge controller — and how does it work?

2. What India’s First MPPT Controllers Actually Shipped With

Built around a powerful 16-bit microprocessor and robust circuit architecture, Su-Kam’s MPPT controllers (such as the Solar-Mate and SCC40A series) introduced industry-leading features:

• Automatic battery selection: Automatically senses and adapts to 12V or 24V battery banks.
• Automatic Temperature Compensation (ATC): Equipped with an ATC ambient temperature sensor, the controller adjusts bulk charging voltages based on real-time weather fluctuations, extending battery lifespan by at least 6 months. (See also Part 04 — ATC.)
• Intelligent 6-stage charging (DT-6S): Features multi-stage charging profiles (Bulk, Absorption, Float, Equalization) to optimize battery health. (See Part 04 — DT-6S.)
• Multi-layer protections: Engineered with robust safeguards including thermal protection (automatically throttling back charging if heat-sink temperatures exceed 90°C), reverse battery current flow protection, and short-circuit safeguards.

3. From India’s First MPPT to Solar PCUs and Hybrid Inverters

Creating India’s first indigenous MPPT technology was not just a standalone product milestone; it served as a vital technological springboard. Mastering high-efficiency DC-DC tracking algorithms and microprocessor-based power conversion under Kunwer Sachdev’s leadership propelled Su-Kam forward into developing advanced Solar Power Conditioning Units (PCUs), followed by cutting-edge Solar Grid-Feed Inverters, and ultimately sophisticated Solar Hybrid Inverters.

By securing technology patents and proving that Indian engineering could outperform imported alternatives, Su-Kam cemented a legacy of relentless innovation that revolutionized green energy adoption across the country. Winning the technology patent for MPPT at that time mattered as much as the hardware — and that same inventive culture grew into a portfolio of 106 technology filings across Su-Kam, Su-Vastika, and later AI ventures. (See also: How Su-Kam came to file 77 patents in 14 years.)

4. Open the Circuit Diagrams: Service Abroad, Brand Abroad

Product patents and efficiency curves win press releases. What wins a brand in international markets is whether a distributor in Africa, the Middle East, or Southeast Asia can repair the box when something fails — without flying an engineer from Gurgaon.

That is why Su-Kam’s training decks carried full circuit diagrams and service schematics. They were not decoration. They were the difference between a dead inverter waiting for parts and a customer back on power the same afternoon. In the next training sessions, those diagrams were deliberately simplified so distributors — not only factory R&D — could give service to the customer, while Su-Kam’s own field engineers carried the same sheets as standard kit.

Conclusion

India’s first MPPT was not a slogan painted on a Chinese import. It was designed and manufactured by Su-Kam under Kunwer Sachdev — more watts from fewer panels, a technology patent win, a platform that scaled into PCUs and hybrids, and the decision to put circuit diagrams in distributors’ hands so Brand Su-Kam could be serviced abroad. That is the power-point revolution.

Kunwer Sachdev

Founder & MD, Su-Kam Power Systems (1988–2019) and Kunwwer.ai — writing on manufacturing, insolvency, and civilizational memory. Read his story →

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