किन्ने मूल्य मात्र नहेर्नुहोस् Look beyond the purchase price

कुन उपकरण चलाउँदा साँच्चै कम खर्च हुन्छ? Which appliance really costs less over time?

दुई उपकरणको किन्ने मूल्य र वार्षिक kWh राख्नुहोस्। आफूले तिर्ने बिजुली दर र चलाउने वर्ष जोड्दा सस्तो देखिएको उपकरण पछि महँगो पर्छ कि पर्दैन, हिसाबले देखाउँछ। Enter two purchase prices and annual kWh figures. Add the electricity rate you pay and the years you expect to use them to see whether the cheaper appliance stays cheaper.

01

एउटै काम गर्ने दुई उपकरण Two appliances doing the same job

Rs/kWh
हालको बिलमा थप युनिटको दर राख्नुहोस्।Use the rate that applies to added units on your current bill.
वर्षyears
दुवै उपकरण टिक्ने यथार्थ अवधि रोज्नुहोस्।Choose a realistic period that both options can serve.
Aपहिलो उपकरणFirst appliance
Rs
kWh/yr
Bदोस्रो उपकरणSecond appliance
Rs
kWh/yr

Annual kWh एउटै test method को label, datasheet वा plug meter बाट लिनुहोस्। फरक capacity वा feature भएका उपकरण सीधै तुलना नगर्नुहोस्। Use annual kWh from labels with the same test method, a datasheet, or a plug meter. Do not directly compare different capacities or features.

02

तुलनाको नतिजाComparison result

कम अनुमानित कुल खर्चLower estimated total cost Efficient model Rs 85,000 over 10 years
A Lower purchase price
किन्नेPurchase
Rs 45,000
बिजुलीElectricity
Rs 50,000
कुलTotal
Rs 95,000
B Efficient model
किन्नेPurchase
Rs 55,000
बिजुलीElectricity
Rs 30,000
कुलTotal
Rs 85,000
कुल फरकTotal differenceRs 10,000
वर्षको खर्च फरकAnnual bill differenceRs 2,000
वर्षको ऊर्जा फरकAnnual energy difference200 kWh
थप मूल्य उठ्ने समयPrice premium payback5.0 years
ध्यान दिनुहोस्Honesty note

यो constant-price को सरल तुलना हो। मर्मत, बिग्रिने जोखिम, replacement, resale value, ऋण, inflation, tariff फेरबदल र पैसाको समय मूल्य यसमा छैन। This is a simple constant-price comparison. It excludes maintenance, failure risk, replacements, resale value, financing, inflation, tariff changes, and the time value of money.

03

हिसाब कसरी हुन्छ?How the calculation works

पहिले annual kWh लाई हालको दरले गुणा गरिन्छ। त्यसपछि रोजिएको अवधिको बिजुली खर्चमा किन्ने मूल्य जोडिन्छ।Annual kWh is multiplied by the current electricity rate. Purchase price is then added to electricity cost over the chosen period.

  1. annual electricity cost = annual kWh × Rs/kWh
  2. period electricity cost = annual electricity cost × comparison years
  3. simplified period cost = purchase price + period electricity cost
  4. total difference = |option A total − option B total|
  5. premium payback = extra purchase price ÷ annual electricity saving

Premium payback तब मात्र देखिन्छ जब बढी मूल्य पर्ने विकल्पले वर्षमा कम बिजुली प्रयोग गर्छ।Premium payback appears only when the higher-priced option uses less electricity each year.

04

नमुना हिसाबWorked example

यो बजार मूल्य वा कुनै खास ब्रान्डको दाबी होइन। नमुनामा A को मूल्य Rs 45,000 र खपत 500 kWh/year छ। B को मूल्य Rs 55,000 र खपत 300 kWh/year छ। दर Rs 10/kWh र अवधि 10 वर्ष राखिएको छ।This is not a market price or a brand claim. The example uses Rs 45,000 and 500 kWh/year for A, Rs 55,000 and 300 kWh/year for B, a rate of Rs 10/kWh, and 10 years.

500 × Rs 10 = Rs 5,000/yearA को वार्षिक बिजुली खर्चA annual electricity cost

300 × Rs 10 = Rs 3,000/yearB को वार्षिक बिजुली खर्चB annual electricity cost

Rs 45,000 + Rs 5,000 × 10 = Rs 95,000A को सरल कुल खर्चA simplified total

Rs 55,000 + Rs 3,000 × 10 = Rs 85,000B को सरल कुल खर्चB simplified total

Rs 10,000 ÷ Rs 2,000/year = 5.0 yearsB को थप मूल्य उठ्ने समयB price premium payback

Rs 95,000 − Rs 85,000 = Rs 10,00010 वर्षमा B तर्फ कम खर्चlower cost with B over 10 years

05

स्रोत र मान्यताSources and assumptions

  • AEPC, Standards and Labeling, checked 25 Aug 2026. AEPC identifies energy-efficiency standards and labels as consumer tools and lists refrigerators, air conditioners, fans, pumps, TVs, geysers, washing machines, laptops, and other appliances in its Nepal work.
  • US Department of Energy, Life Cycle Costs for Acquisition, published 2 Dec 2024 and checked 25 Aug 2026. Its simple example adds initial price to energy use × energy price × years, while noting that full ownership cost can also include maintenance, repair, replacement, and disposal.
  • NIST Handbook 135e2025, Life Cycle Costing Manual, August 2025, checked 25 Aug 2026. NIST's full present-value model includes initial, replacement, residual, energy, maintenance, and other costs. This calculator deliberately does not claim to perform that full analysis.
  • Nepal Electricity Authority, Consumer Tariff Rates, checked 25 Aug 2026. Enter the current marginal Rs/kWh that applies to your household instead of treating one rate as valid across Nepal.

नमुना मूल्य, annual kWh, Rs 10/kWh र 10 वर्ष सबै उदाहरण मात्र हुन्। आफ्नो bill, energy label, datasheet वा मापनबाट input बदल्नुहोस्।The example prices, annual kWh, Rs 10/kWh, and 10 years are illustrative only. Replace them with your bill, energy label, datasheet, or measurement.