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By a former associate · the chronicle

The Story, by Era

Every product, partnership and turning point — grouped by era. Here is the view from inside the office.

1988 — Cable TV Era

The associate joined around 2000 — these years sit outside witness testimony. Timeline bridge: Before the Inverter.

MATV / CATV Systems

MATV / CATV Systems

Shared antenna systems for hotels and apartments — Kunwer Sachdev's very first product category, before any of the inverter work.

Pre-join era · outside witness scope
CATV Amplifiers

CATV Amplifiers

Manufactured in-house amplifiers and modulators for cable TV signal distribution across buildings.

Pre-join era · outside witness scope
EchoStar Satellite Receivers

EchoStar Satellite Receivers

India distributor for EchoStar USA — installed dish systems at the PM's house and every military chief's residence.

Pre-join era · outside witness scope
Cable TV at Air Force Station

Cable TV at Air Force Station

Ran a cable TV service at Subroto Park — building lasting contacts across Army, Navy, and Air Force.

Pre-join era · outside witness scope
1998–2003 — The Inverter Breakthrough
India's First MOSFET Inverter

India's First MOSFET Inverter

Single-battery design, black chassis, modular board — completely different from anything in the market in 1998.

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First Inverter Catalogue

First Inverter Catalogue

The very first product brochure for a Su-Kam inverter — also the first newspaper coverage the product received.

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Electronic Generator

Electronic Generator

An inverter-based electronic alternative to diesel generators for small commercial loads.

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Chic — India's First Plastic Inverter

Chic — India's First Plastic Inverter

GE Plastics partnership, 120°C-rated PC ABS body, India Today innovation award. Stayed in homes for 20 years.

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2003–2007 — Industry Firsts
FairyQueen Inverter

FairyQueen Inverter

Designed like a locomotive engine for bedrooms — built for beauty, undone by packaging. The most instructive failure of the inverter era.

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India's First Sinewave Inverter

India's First Sinewave Inverter

Two R&D teams competing, DSP vs microcontroller — the result eliminated the appliance hum from Indian homes.

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Desktop Computer UPS

Desktop Computer UPS

First pure sinewave UPS for home computers in India — compact, long backup, zero switchover gap.

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Home UPS (2005)

Home UPS (2005)

Seamless switchover — kept computers and TVs running without a flicker. Every competitor adopted the name within a year.

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2007–2012 — Scale & Specialisation
Power Guard

Power Guard

Replaced traditional voltage stabilisers — protected home appliances from surges, dips and spikes.

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High-Capacity IGBT Inverters

High-Capacity IGBT Inverters

5KVA and above — disrupted the small generator market. The proof was taken on a demo truck that toured across India.

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Touch Screen PCU

Touch Screen PCU

Power Conditioning Unit with a full touch-screen interface — years ahead of what competitors were offering.

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Matrix Inbuilt Inverter

Matrix Inbuilt Inverter

An inverter with the battery sealed inside — elegant on paper, 150AH heavy in practice. The instructive failure of the integration dream.

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2008–2012 — New Markets
Tractor Inverter

Tractor Inverter

IP67-rated inverter built for Escorts Tractors — reliable power for farmers in remote areas, designed to survive dust, mud and monsoon.

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Automotive Batteries

Automotive Batteries

A range of automotive batteries for trucks, tractors and commercial vehicles.

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Telecom Tower Inverter

Telecom Tower Inverter

Built to replace diesel generators on telecom towers — a sound idea undone by the in-house SMF battery. One of the ones that got away.

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Online UPS — Gamatronic JV

Online UPS — Gamatronic JV

Partnership with Israel's Gamatronic — first domestic manufacture of double-conversion online UPS in India, for data centres and critical loads.

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2008–2015 — India's Solar Products

Off-grid kits and PCUs that carried solar from showroom to village — part of India's early rural electrification push.

Solar Home Lighting System

Solar Home Lighting System

Multi-light kit with radio and phone charging — engineered to outperform Chinese competitors on features and reliability.

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Solar PCU (Off-Grid)

Solar PCU (Off-Grid)

Power Conditioning Unit for off-grid solar — the company's entry into India's rural electrification mission.

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Solar Water Pumping System

Solar Water Pumping System

Solar-powered pumps replacing diesel across Indian agriculture — built and deployed at scale.

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DC Solar System for Villages

DC Solar System for Villages

100W per home, fan + 2 lights + mobile charging — deployed in remote UP villages with zero grid access.

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2009–2015 — Major Solar Projects

Su-Kam's solar journey ran alongside India's own — from early rural kits to megawatt-scale projects. Dedicated chapters for each are coming.

SECI Phase 1 — 2MW

SECI Phase 1 — 2MW

Among the first companies in India selected by SECI for a 2MW solar allocation — before solar was mainstream.

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Punjab Engineering College & Chennai Metro

Punjab Engineering College & Chennai Metro

Two landmark commercial solar installations — overcoming shadowing challenges and scope changes to deliver.

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IFFCO Headquarters, New Delhi

IFFCO Headquarters, New Delhi

Solarised the IFFCO national headquarters — despite on-site theft of materials, completed and commissioned.

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SBI Academy, Gurgaon

SBI Academy, Gurgaon

Full building solarisation with car park solar shed — reduced electricity bill by 70%.

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UP Lohia Vikas — Remote Village DC

UP Lohia Vikas — Remote Village DC

Off-grid DC systems for hundreds of homes in remote UP villages — 100W per house, lights, fan, mobile charging.

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Arunachal Pradesh — 600KW Grid Feed

Arunachal Pradesh — 600KW Grid Feed

The first northeast solar project — 600KW grid-connected installation, launching expansion across all 7 NE states.

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Assam Rifles — 7 NE Locations

Assam Rifles — 7 NE Locations

Joint venture with REIL — 100–150KW off-grid systems at 7 Assam Rifles locations, eliminating diesel dependency.

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Mini-Grid 250KW — UP Villages

Mini-Grid 250KW — UP Villages

Three 250KW mini-grid installations connecting 5–6 villages each — the largest rural electrification project.

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Army Mobile Solar Trolley

Army Mobile Solar Trolley

Foldable solar system for the Indian Army — deploy anywhere, generate power in the field, pack and move. Over a year in engineering.

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2012–2015 — Cutting Edge
IoT-Based Inverters & UPS

IoT-Based Inverters & UPS

Remote monitoring, app control, and smart load management — when nobody else in India was building connected inverters.

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Battery Water Topping Kit

Battery Water Topping Kit

Automatic battery maintenance system — extended lead-acid battery life and eliminated manual topping.

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Lead-Acid BMS

Lead-Acid BMS

Equalisation technology for battery banks — pioneered in 2005 when premature battery failures were costing customers thousands.

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SMD-Based PCBs

SMD-Based PCBs

Moved manufacturing from through-hole to Surface Mount Device PCBs — smaller, faster, more reliable. Became the industry standard.

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Made in India

World-Class Factories — Built from Scratch

Dedicated R&D Centre

Dedicated R&D Centre

In-house engineering lab with 100+ engineers — where India's first sinewave inverter and first solar PCU were designed.

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Solar Panel Manufacturing

Solar Panel Manufacturing

An in-house solar panel plant — manufacturing crystalline PV modules domestically when imports dominated the market.

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Export to 90+ Countries

Export to 90+ Countries

Started with one inverter in a suitcase to Lagos. Grew to 90+ countries. Nobody in India's inverter industry had tried it before.

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Awards & Recognition

What the Press and the Industry Said

India Today Innovation Award

India Today Innovation Award

Awarded for the Chic plastic inverter — the first consumer electronics design award ever given to an inverter company.

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Outlook Business — Power Sector

Outlook Business — Power Sector

Featured as a defining force in India's power sector — recognising the role in creating the home inverter market.

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Discovery Channel — Sun Fuel

Discovery Channel — Sun Fuel

Discovery Channel India produced a documentary on the solar mission — the first such feature on an Indian inverter brand.

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Patents Filed

Patents Filed

Patents covering sinewave technology, battery management, solar PCUs, IoT inverters, and original industrial designs.

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2018 onwards — Loss & Comeback

The Reliance Investment That Did Not Land

The capital that was supposed to take the company to the next stage — and the way it actually unfolded.

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The Hong Kong Spectrum Analyser

The customs case that taught the team what international trade really costs when one document is missing.

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Ashes of Su-Kam — Why This Chronicle Was Born

After NCLT, after the depression, after the silence — what made one founder decide to write everything down.

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✍️

More chapters being written

The chronicle is being added to continuously. New chapters on the dealer-meet years, the BatteryScopie story, and the Discovery Sun Fuel documentary — coming as they are written.