Things to Keep in mind before choosing an inverter

Boiling the summer months are just couple weeks ahead, scheduled and unscheduled power cuts are required as usual. Inverters are among the most demanded products of summer months. Are you planning to buy or change your inverter in this season? Then instead of being held in the marketing gimmicks, understand some fundamental facts and do a little bit research. Here some facts you must understand before buying an inverter.

Inverter Calculate your power requirements

Before you go to purchase a luminous inverter

• Make a rough estimation of the power requirements. Remember- Inverter isn't a Generator. Inverter has its own limitations. You can’t power and run your complete home with a normal inverter. If your power requirement is more than 3000 VA, then an inverter alone can’t cater your demands effectively. Without doubt a high power inverter can run your refrigerator and air conditioning units, but how long? Here your battery won't last more than few hours. Hence it it easier to go for a home generator. If however you don’t want a single minute power downtime, a power inverter - electric generator combination is a great option.

Wattage rating of typical kitchen appliances

Appliances Power

Fan (Ceiling) 50-75 Watts

Fan (Table) 25-50 Watts

CFL 18 Watts 18 Watts

Computer (Desktop) 80- 150 Watts

Laptop 20- 75 Watts

LCD TV (32") 150 Watts

Refrigerator 160 - 250 Watts

Tube Light (4 Feet) 40 Watts

Starting power and running power

Starting and running power dependence on all electric appliances are very different. An 18 Watts CFL takes around 25 Watts capacity to start and after few seconds it stabilizes to 18 Watts. Some appliances like Refrigerator, Washer etc take almost double capacity to start as compared to the normal running power. Hence before selecting an inverter you have to calculate the starting power requirement also.

Difference between VA and Watts

Often people confuse using the difference between Watts and VA ratings of inverter or any other kitchen appliances. Manufacturers use these two terms according to their requirements to confuse and mislead most effective and quickest. Power drawn by the equipment (Power using equipment like Bulb, Fridge, Washing Machines, ACs, Stabilizers etc.) and Power generated through the equipment (Generators, Inverters, UPS etc) could be expressed in Watts or VA (Volt Ampere). Generally Power generating or stabilizing equipment manufacturers use the term VA to specify their ratings and power consuming products use Watts to specify their ratings. Here comes the difference. Power in Watts may be the real power drawn or given by an equipment, this is actually the real value. VA is the apparent power (more theoretical) which is obtained by multiplying the Voltage and Current drawn/supplied by an equipment. We can equate the VA and Watts ratings:

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