76 Patents That Made India's Solar Revolution — The Inventions of Kunwer Sachdev
76 Patents That Made India's Solar Revolution
The Inventions of Kunwer Sachdev — the Solar Man of India and Inverter Man of India
Kunwer Sachdev Sir with a 3-Phase Solar PCU — one of the 76+ patented inventions that transformed India's power landscape.
A Legacy We Are Proud to Carry Forward
At Su-vastika, we are fortunate to be guided by one of India's most prolific inventors. Recently, while cataloguing old patent documents and press clippings, we uncovered the full scale of what our mentor Kunwer Sachdev Sir achieved during his years at Su-Kam. Here is what the records reveal — and we invite you to read the full story behind the man who made it all possible.
Before solar panels dotted Indian rooftops, before power backup became a household phrase, our mentor was quietly filing patent after patent — building the intellectual foundation of an entire industry. Widely recognized as the Solar Man of India and the Inverter Man of India, Kunwer Sir holds 76+ technology and design patents — making him the first Indian entrepreneur to file this scale of patents in the power backup and solar energy sector.
What we found in the archives is not a story about filing paperwork. These records show a trail of inventions that changed how 1.4 billion people access electricity.
As reported by SiliconIndia, India Today, and Deccan Herald, Kunwer Sir's journey from a modest beginning to becoming the nation's foremost solar energy pioneer is a masterclass in relentless innovation. We encourage you to explore the full pioneer timeline.
India's First Plastic-Body Inverter — "Innovation of the Decade"
In the early 1990s, inverters in India were bulky metal boxes. Our mentor asked: Why can't an inverter be safe, light, and beautiful?
The result was India's first plastic-body inverter. India Today named it the "Innovation of the Decade".
This single invention democratized power backup in India.
First DSP-Based High-Voltage MPPT Solar Charge Controller
Our mentor's R&D team solved one of solar's most stubborn problems: how to extract maximum power from solar panels under changing conditions.
India's first DSP-based high-voltage MPPT solar charge controller.
India's first DSP-based MPPT solar charge controller dynamically adjusts voltage and current to harvest maximum power from every panel, every second.
India's First Hybrid Solar PCU
Kunwer Sir's hybrid solar PCU was the first of its kind in India — eliminating the need for separate inverters, charge controllers, and changeover switches. One box instead of three.
See the complete list on the inventions page.
India's First Govt-Recognized In-House R&D Unit in Power Backup (2002)
In 2002, the DSIR, Government of India, recognized Su-Kam's R&D unit — the first in the Indian power backup industry.
The R&D team at Su-Kam — first government-recognized in-house R&D unit in India's power backup sector.
The R&D unit produced innovations in MOSFET-based topologies, microcontroller-driven systems, and DSP sine wave technology.
The Technology Stack: MOSFET, Microcontroller & DSP Sine Wave
MOSFET-Based Power Conversion
Pioneering MOSFET technology in Indian inverters achieved dramatically higher efficiency and lower heat generation.
Microcontroller-Driven Intelligence
Kunwer Sir's microcontroller-based designs added programmability, self-diagnostics, load management, and adaptive charging algorithms.
DSP Pure Sine Wave Generation
DSP sine wave technology delivered output quality matching or exceeding grid power.
First 4-Star BEE Rated Inverter
The first inverter in India to earn a 4-star BEE energy efficiency rating.
Patented efficiency improvements earned India's first 4-star BEE rating for an inverter. One of many awards and recognitions that validated Kunwer Sir's engineering philosophy.
Su-Kam Brainy Touch: India's First Touch-Screen Inverter
The Su-Kam Brainy Touch — a patented touch-screen solar PCU inverter.
Featuring a full-color touchscreen interface, users could monitor power consumption, battery status, solar input, and switch modes with a tap. See it in action in the video library.
Lithium Battery Management Systems: The Next Frontier
Patented BMS software for lithium batteries.
Patents in lithium BMS cover cell-level monitoring, thermal management, state-of-charge algorithms, balancing circuits, and safety cutoff protocols.
10 KVA inverter with 10 KW lithium battery — powered by patented BMS from Su-vastika.
At Su-vastika, we continue pushing the boundaries with IoT-enabled remote monitoring, cloud-based fleet management, and AI-driven predictive maintenance.
The Patent Journey: A Timeline of Firsts
India's first plastic-body inverter — "Innovation of the Decade" by India Today.
MOSFET-based power conversion and microcontroller-driven inverter systems patented.
Su-Kam's R&D unit recognized by DSIR — first in power backup industry.
DSP-based pure sine wave inverter and India's first hybrid solar PCU patented.
India's first DSP-based high-voltage MPPT solar charge controller.
Su-Kam Brainy Touch launched. First 4-star BEE rated inverter. Expansion to 70+ countries.
Lithium BMS patents. Su-vastika founded. IoT and cloud-based monitoring patents. Total crosses 76+.
For complete details and verification, visit solarmanofindia.com.
Why 76 Patents Matter for India
Kunwer Sachdev Sir chose a different path. Every one of his 76+ patents represents Indian intellectual property — designed in India, for Indian conditions, by Indian engineers.
- Energy independence — reduces dependence on foreign IP and imports.
- Job creation — R&D talent creating high-skill engineering jobs.
- Export competitiveness — expansion to 70+ countries.
- Consumer benefit — more efficient, affordable power backup.
Visit the blog archive for more articles.
From Kunwer Sachdev’s Network
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The story of Kunwer Sachdev — 76+ patents, India’s first plastic-body inverter, and the journey that brought solar into millions of homes.
➤ Pioneer timeline of firsts
➤ Video library — the work in his own voice
Part of the Series
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25+ patents · Made in India · 10,000+ installations