A useful electricity estimate needs three inputs: the concentrator’s electrical power, the prescribed hours of operation and the tariff that applies to your household. A state-wide price range can miss differences between utilities, billing periods, slabs and subsidies.
Use the exact model’s documentation or a suitable measurement arranged with the supplier. Do not reduce prescribed oxygen use to fit an electricity budget; raise affordability concerns with the treating team and provider so that care can be planned safely.
Calculate energy first
Electrical energy in kilowatt-hours is power in watts divided by 1,000, multiplied by operating hours. One kilowatt-hour is commonly called one electricity “unit”.
For an illustrative machine drawing 350 W for 18 hours a day over 30 days, the calculation is 0.350 × 18 × 30 = 189 kWh. At 24 hours a day, the same assumed power gives 252 kWh over 30 days.
These are arithmetic examples, not measurements of a Home Medix product or recommended treatment durations. Actual consumption may differ from a nameplate limit and can vary by model and operating mode. A rating in VA is not the same as a measured watt value.
Apply the tariff to the whole bill
Look at your latest bill and the current tariff published by your utility or state electricity regulator. Check the consumer category and billing period, energy charges, fuel adjustments, taxes, fixed charges and any subsidy conditions relevant to you.
If all 189 additional units in the example were charged at an illustrative ₹8 per unit, the energy charge would be ₹1,512. This is not a current tariff quote. Slab changes or subsidy eligibility can make the actual difference larger or smaller.
The more accurate method is to compare two bills calculated under the same current rules: expected household use without the concentrator and expected use with it. A recent bill divided by its total units may be a poor estimate of the price of additional consumption.
Keep backup costs separate
Electricity cost does not tell you how long a battery or cylinder will provide backup. Runtime depends on the equipment, usable stored energy or gas, prescribed demand and operating limits. Have the supplier specify and demonstrate an appropriate backup arrangement.
A UPS rating in VA or a battery capacity in amp-hours alone does not establish runtime or compatibility. Ask a qualified installer about startup demand, output characteristics and the actual system. Do not rely on an untested backup because an online example uses a similar concentrator.
Evaluate solar with an actual quotation
Ask a solar installer to model the household load, location, roof, applicable tariff and proposed system. Electricity generation and operation during an outage are separate questions: confirm exactly what backup capability is included. Do not assume a rooftop installation can power essential equipment during a blackout.