Solar Innovation & DC Power
From Kunwer Sachdev — then MD and CEO of Su-Kam, the Solar Man of India — whose passion was new projects, new technologies, and training people. The solar PCU, Direct-DC rural homes, and field projects, in his own record.
Why Inverting DC to AC Was a Mistake: The Direct-DC Innovation Behind India’s 40,000 Solar Homes Project
How Kunwer Sachdev and Prof. Ashok Jhunjhunwala (IIT Madras) proved Direct-DC solar efficiency, leading to the electrification of 40,000 rural UP homes under Lohia Awas.
How Su-Kam Replaced Diesel at Eighteen Assam Rifles Outposts — Including the 100 kW Plant at Moreh
Eighteen sites, 1.3 MW off-grid solar, REIL and JNNSM, a 48-hour SLA, and the Moreh 100 kW plant on the Myanmar border. Full essay on KunwerSachdev.com.
The Houses Were Free. The Last Mile Was Not: Su-Kam’s 10,000-Home Tamil Nadu Green House Project
CM Green House for BPL families: 10,000 homes, five-year lead-acid maintenance, unfinished government houses — then a hard stop because the work lost money.
State’s First Petrol Station Run on Solar: The 2013 Andhra Pradesh Press That Opened the Forecourt
April 2013 cuttings: Kodad (Nalgonda) and Shadnagar on Su-Kam solar backup — 5 kVA PCU, 2 kW panels — and the dispenser jerk-current problem.
A Petrol Pump That Cannot Afford Darkness: Su-Kam’s 10 kVA Off-Grid System in Jalgaon
Three dispensers on a 10 kVA off-grid Solar PCU in Jalgaon — after the hard problem of high, pump-by-pump starting current. Recovered from the Su-Kam blog archive.
Haryana’s First Solar Petrol Pump: Royal Indian Filling Station, Sanoli, Panipat
Dainik Tribune, 3 June 2015: 10 kVA at Royal Indian Filling Station near Sanoli — Haryana’s first fully solar petrol pump, operator Sanjeev Chaudhary.
The Hindu Named It in the Pipeline. The Company Blog Named the Hospital.
April 2013: Parakala Lalitha Nursing Home, Warangal — 10 kW rooftop, same week as the AP petrol-pump cuttings.
Four Hours of Grid. Four Brainy Eco Boxes. A Sub-District Hospital in Anantnag.
December 2016 company blog: Sub District Hospital, Anantnag — four Brainy Eco 1100s on lighting circuits after 4–5 hours of grid a day.
Twenty Days Before He Died, Kalam Lit Up Two Villages With Us
7 July 2015: 250 kW off-grid mini-grid at Fakirpura and Chanduahaar, Kannauj — UPNEDA, ₹6.15 crore, 450 households. Full essay on KunwerSachdev.com.
No Mains. No Inverter Losses. A House in Fazilka That Ran Entirely on Solar DC.
10 July 2016: Mr. Dinesh Modi’s home in Ghallu, Abohar — Solar DC System 120, no mains, DC fan, light and dish TV.
The Marketing Guru of India: How I Built the Su-Kam Brand Without the Biggest Budget
Umbrellas on a thousand street carts, branded buses, 'Su-Kam Lao, Mercedes Chalao', India's first inverter YouTube channel, 1,000+ dealer meets, and the dais with Philip Kotler — how Kunwer Sachdev out-branded bigger rivals with sharper ideas, not deeper pockets.
Why Our Mentor Built GiftedKids.in — India's First Gifted Education Platform
At 47, the Solar Man of India discovered he had been an unidentified gifted child — so he co-founded GiftedKids.in to find the others.
InverterIndia.com: The No-Bias Power Buying Authority Our Mentor Built
Zero affiliate links, lab-tested numbers — the honest inverter & battery buying resource Kunwer Sachdev built.
How Kunwer Sachdev Built India's Solar Industry: From Su-Kam's First Inverter to 77 Patents at Su-Kam
From a 1988 startup to power backup in 1998, Kunwer Sachdev built Su-Kam into a brand with 77 patents filed at Su-Kam, 90+ export markets and ₹1,200 crore in revenue by 2019. This is how it happened.
The Solar Man of India Has Launched a Knowledge Platform for the Solar World
Our mentor, Kunwer Sachdev, is giving three decades of solar knowledge away — free, to everyone.
Why We Built the Su-Kam Solar YouTube Channel: The Training Problem That Changed Everything
167 videos. 105,000 subscribers. But it started with a far more urgent problem — people leaving and taking everything they knew with them.
The Solar DC System That Lit 50,000 UP Homes — and Got a Discovery Channel Documentary
From a dropped TEDA pilot to 50,000 UPNEDA homes. BLDC fans invented from scratch. A grid-integrated MPPT patent. Then Discovery Channel showed up.
The Hybrid Solar Inverter That Changed Everything: Running Load From Both Solar and Mains
In 2009–10, Su-Kam built the first solar inverter that could charge batteries and run home loads simultaneously from solar and grid. 1.35M+ views across 3 videos.
The Hidden Tax: Why Your Data Center Wastes 21% of Its Power
Three conversions. 21% loss. Billions burned as heat every year.
DC-Direct Architecture: Eliminating the Middleman Between Solar and Server
The complete architecture for powering servers directly from solar.
Why LiFePO4 + Solar = 10-Year Battery Life for Servers
The battery chemistry that makes solar-powered data centers viable.
AI-Powered DC Microgrids: The Future of Data Center Power
How AI transforms DC microgrids into self-optimizing power systems.
From Su-Kam DC 120 to Data Center Scale: A Patent Journey
77 patents filed at Su-Kam. One vision. The world is finally catching up.
Su-Kam HLS1210: The Solar Home Light System
A commercial solar solution designed for rural and urban homes alike.
TEDA 100Wp Solar PCU: Powering Tamil Nadu's Government Solar Revolution
A government project that brought solar power to Tamil Nadu homes.
The Solar PCU — How a Meeting in Tamil Nadu Changed Indian Solar Forever
The 2007 TEDA project that gave birth to Su-Kam's Solar PCU and defined the company's identity as India's solar pioneer.
Engineering Solar Monitoring Without Internet — The Handheld Device Story
How Su-Kam engineered kilowatt-hour data collection for rural Tamil Nadu when there was no internet, no cellular data and no cloud.
From Tamil Nadu to Munich — How the Solar PCU Took India to the World Stage
How Su-Kam's Solar PCU went from a government pilot in Tamil Nadu to Intersolar Europe in Munich and markets in 90 countries.
From Village Darkness to Solar Light — How Su-Kam Electrified Rural India
How Su-Kam's Solar Awareness Team and dealer network brought solar power to forgotten villages across India.