Blog
329 articles on UPS, lithium battery, solar hybrid and energy storage technology.
The Inverter Man Who Became the Solar Man of India — Kunwer Sachdev's Journey
The Su-vastika team traces their mentor Kunwer Sachdev's extraordinary journey — from selling pens on Delhi streets to powering millions of homes with solar energy.
76 Patents That Made India's Solar Revolution — The Inventions of Kunwer Sachdev
While cataloguing old patent documents and press clippings, the Su-vastika team uncovered the full scale of what mentor Kunwer Sachdev achieved — 76+ patents that changed India's power backup industry forever.
Kunwer Sachdev: The Solar Man of India Mentoring Su-vastika's Next Chapter
Behind Su-vastika's 25+ patents stands a mentor with four decades of building: Kunwer Sachdev, the Solar Man of India — founder of Su-Kam, inventor of India's first plastic-body inverter, and the engineering mind whose life's work is archived at SolarManOfIndia.com.
How Much Backup Will Your Battery Really Give? Use the Free Calculator Built on My Lab Tests
Brochure backup numbers fail because they ignore how batteries really behave under load. Kunwer Sachdev explains the free backup calculator at inverterindia.com, built on his own minute-by-minute discharge tests of 150Ah and 200Ah tubular batteries.
How Solar Hybrid PCU MPPT Works: 4 Real Scenarios Every User Must Know
Most solar PCU users do not realise their system has four distinct operating modes. Kunwer Sachdev — who designed Solar PCUs at Su-Kam — explains each scenario: what triggers it, how the PCU manages solar, grid, and battery together, and why Scenario 4 is the one that actually reduces your electricity bill.
Solar PCU LCD Display Messages Explained — Backup Mode, Mains Mode, Faults & Rotary Switch
The LCD on your Solar PCU is telling you something specific every time it shows a message. This guide decodes every display message — backup mode, mains mode, overload, battery low cut, high/low cut, solar mode — plus the three rotary switch positions and what they do.
Solar Hybrid PCU Wiring & Earthing Guide: Wire Sizes, Panel Config & Safety Rules
Most solar PCU problems start with the wiring — undersized battery cable, wrong MCB type, missing earthing. This guide gives exact wire sizes for every circuit, solar panel series/parallel configuration, earthing rules under IS 3043, and the DC vs AC MCB distinction that prevents fires.
How to Connect Your Solar PCU to the App: Bluetooth and Wi-Fi Step-by-Step Guide
The BLE and Wi-Fi dongle turns your Solar PCU into a smart system you can monitor and control from your phone. This step-by-step guide covers both Bluetooth and Wi-Fi connection methods — dongle setup, scanning, pairing, OTP login, and adding your device for remote monitoring.
How to Install a Solar Hybrid PCU: Complete Guide — Wiring, Safety & LED Indicators
A Solar PCU installed incorrectly underperforms or fails — no matter how good the unit. This complete guide covers wire sizing, safety rules, panel configuration, the installation diagram, and every front panel LED explained. By Kunwer Sachdev, who designed these systems at Su-Kam.
Su-vastika Solar PCU Mobile App: Every Setting Explained by its Creator
Nobody explains their own app, setting by setting. The Su-vastika Solar Hybrid PCU mobile app — on Google Play and the App Store — explained screen by screen by its creator…
Inside a Solar Hybrid PCU: MPPT Internal Circuitry Explained by its Designer
What's really inside a solar hybrid PCU? I have been designing Power Conditioning Units since 2011, when my R&D team built one of India's first integrated solar PCU circuits — an MPPT charge controller, grid charger, pure sine wave inverter, isolation transformer and…
Su-vastika 2.5kVA Solar Hybrid PCU with MPPT: Features & Mobile App
Smart solar in a compact size. The Su-vastika 2.5kVA solar hybrid PCU combines MPPT solar charging with Bluetooth + Wi-Fi connectivity, so you can monitor solar generation, battery charge and load sharing live on a dedicated mobile app. Here's everything the 2.5kVA model can do…