Guides
Answers to the questions we get asked on the phone several times a month.
7 min read
How to size a UPS for an industrial load
Most undersized UPS installations we are called out to went wrong at the quotation stage, not on site. Almost always for the same three reasons.
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Servo stabilizer or UPS?
These two get compared constantly and they are not alternatives. One fixes voltage, the other fixes continuity. Knowing which problem you have takes a week and a logger.
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Why UPS batteries fail early in Pune
A VRLA battery rated for five years will often manage two and a half here. The cause is almost never the battery — it is the room it sits in.
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What to check before signing a UPS AMC
Two contracts on the same machine can differ by three times in price and by rather more than that in what you actually receive. The difference is almost never on the front page.
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Reading a UPS spec sheet without being fooled
Almost nothing on a UPS datasheet is untrue. Quite a lot of it is true under conditions the sheet does not print.
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Lithium vs VRLA for UPS banks in India
The interesting variable in India is not price. It is the temperature of the room the bank is going to live in.
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Online UPS vs offline UPS
One rebuilds the waveform continuously; the other passes the mains through and switches to battery when it fails. That single difference decides which one your equipment needs — and for a lot of loads, the cheaper answer is the correct one.
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How to compare UPS manufacturers
Most of the firms listed as UPS manufacturers in Pune assemble imported cabinets or resell somebody else’s. That is a legitimate business, but it is a different one, and it changes who answers the phone in year seven.
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What rooftop solar does to your UPS
Plants that put solar on the roof often find the UPS behaving differently within weeks. Nothing has failed — the supply it is watching has changed character, and the UPS is doing exactly what it was told to.
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Why a DG set and a UPS argue
The generator starts, the changeover closes, and the UPS stays on battery as though nothing happened. This is the most common complaint on sites running both, and it is almost never a fault in either machine.
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What a UPS costs to run
A double-conversion UPS is one of the few things in a plant that runs at full duty every hour it is switched on. Four points of efficiency, on a 100 kVA load, is roughly a lakh a year — which is frequently more than the price difference that bought it.
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What EV chargers do to an industrial supply
A fleet charger is not another motor. It is a large, non-linear load that can go from nothing to full draw in seconds, several times a shift, on a connection sized before anyone owned an electric vehicle.
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Your server room got denser
One machine can undo the sizing of a whole room. A rack that drew four kilowatts for a decade is being replaced by one drawing thirty, and the UPS in the corner was specified against the old number.
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How to read a power quality report
A logger produces a hundred pages and a recommendation on the last one. Four measurements decide what you actually need, and knowing which they are turns the report from a sales document into a specification.
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