Blog
333 articles on UPS, lithium battery, solar hybrid and energy storage technology.
The Mind That Never Stops Inventing — Kunwer Sachdev, India's Highest Patent Filer in Power Backup & Solar
He filed 77 technology patents at Su-Kam and lost them all in one day. He did not stop — at Su-vastika he has filed 25 fresh patents and counting. A salute to Kunwer Sachdev, the highest patent filer in India's power backup and solar power industry.
Is a LiFePO4 Inverter Battery Safe? Can It Explode?
Is a LiFePO4 inverter battery safe? Unlike the NMC cells behind phone and EV fires, LiFePO4 resists thermal runaway to ~270°C, releases no oxygen, and a BMS cuts faults first. What actually causes battery fires — and the checks to make before buying.
What Size Inverter & Battery Do You Need for Your Home (2BHK/3BHK)?
What size inverter and battery for a 2BHK or 3BHK home? Practical sizing guide for typical Indian appliances, AC backup, and lithium vs lead-acid — plus a free calculator.
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.
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.
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.
Retrofit Lithium Battery Guide: Replace Lead-Acid Without Changing Your Inverter
How to retrofit a lithium battery into your existing inverter without replacing it — compatibility guide, step-by-step process, backup time comparison, and 10-year cost analysis.