Blog
335 articles on UPS, lithium battery, solar hybrid and energy storage technology.
Which Inverter Do You Need to Run a 1.5 Ton AC?
Which inverter runs a 1.5 ton AC? A 1.5 ton AC draws about 1500-1800W, so you need a 3.5-5 kVA lithium inverter with surge capacity. How to size the inverter and battery, plus a free calculator.
Which Appliances Can an Inverter Run? Fridge, AC, Pump & More
Which appliances can an inverter run? Typical wattage for a fridge, AC, water pump, washing machine and more — plus a free calculator that gives your exact inverter size, battery and backup time.
Inverter or UPS Not Working? Troubleshooting Guide: 6 Common Problems & Fixes
Inverter not working? Diagnose the 6 most common inverter/UPS problems from the warning lights — no output, battery-low shutdown, overload, short circuit, mains not sensing and MCB tripping — with step-by-step fixes from Su-vastika's own service manual.
Solar hybrid PCU MPPT 5.5KVA technology described
How the Su-vastika 5.5 kVA Solar Hybrid PCU works: MPPT solar charging (up to 30% more than PWM), solar-first priority logic, lithium BMS integration, Bluetooth/Wi-Fi app, over-the-air updates, digital warranty and BIS certification.
The Best Diesel Generator Alternative: Lithium Battery ESS by Su-vastika
A lithium Battery Energy Storage System (BESS) is the best diesel generator alternative in India — silent, pollution-free, instant backup at a far lower running cost. How it works, where it wins, and how to size one from home systems up to 500 kVA.
Inverter/UPS Charging Explained: Charger Capacity, Charging Time, ATC & Battery Life
The charging section is the most important part of an inverter/UPS — it decides charging time, battery life and even your electricity bill. Here's how charger capacity, battery type, six-stage charging, ATC and efficiency all work together.
Why Is My Inverter Not Charging the Battery? Causes & Fixes
Inverter not charging the battery? Most causes are simple — a tripped fuse, loose terminal, low mains voltage or a tired battery. Here's how to diagnose and fix every common reason an inverter/UPS stops charging.
Introducing the Lift Inverter ERD Backup Calculator — Designed by Our Mentor, Kunwer Sachdev
A power cut should never trap anyone in a lift. We are introducing a free Lift Inverter ERD backup calculator — designed by our mentor Kunwer Sachdev, the inventor of the ERD — that tells you exactly how much battery backup your elevator really needs.
Su-vastika Solar PCU 5500: Every Power-Flow Condition, Explained with Diagrams
A condition-by-condition visual guide to the Su-vastika Solar PCU 5500 — grid charging, solar sharing, save-the-bill mode, power-cut backup, float and low-battery sleep, plus its protection logic — each with an animated power-flow diagram.
Solar Hybrid PCU Load Sharing on the Mobile App: Monitor & Control
Your solar system, in your pocket. A Su-vastika solar hybrid PCU combines UPS load management, mains-mode solar sharing and IoT connectivity — and the dedicated app makes solar PCU load sharing monitoring on mobile effortless. Watch solar, grid and battery share your load in…
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 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.