About this page — a recovered blog post from the Su-Kam era, originally published on blog.su-kam.com during Kunwer Sachdev's tenure as Founder & MD. The original blog was lost after Su-Kam's insolvency; this page is reconstructed from the Internet Archive and preserved as a historical record.
India's First Sine Wave Inverter
Su-Kam pioneered India's first pure sine-wave inverter — a breakthrough that reset the standard for the entire power-backup industry. Before it, Indian homes ran on crude square-wave inverters that hummed, ran appliances hot and damaged sensitive electronics.
Su-Kam's engineering brought MOSFET, microcontroller and DSP sine-wave technology into everyday inverters before anyone else in India — clean, grid-quality output that protected TVs, computers and motors.
It was part of a run of firsts under Kunwer Sachdev. The same R&D culture produced India's first plastic-body inverter (the Chic series), which India Today named an 'Innovation of the Decade.' That idea was born from a safety concern: Kunwer heard a child had been shocked by a metal-bodied inverter and resolved to make them safe for the home.
The sine-wave breakthrough is where Su-Kam's reputation as an inventor-led company began — and the foundation everything solar was later built on.
Watch — related Su-Kam videos (@sukam)
From the Facebook archive
Su-Kam Solar's innovation & R&D coverage — view in Facebook archive →Verified references (third-party)
Related recovered posts