मौसमअनुसार उत्पादन Season-aware estimate

सोलारले दिन र महिनामा कति युनिट बनाउँछ? How much energy will your solar system generate?

सिस्टमको kW, आफ्नो ठाउँ र महिनाको peak sun hours, प्यानलको दिशा, छायाँ र बाँकी नोक्सानी राखेर दैनिक र छानिएको अवधिको kWh अनुमान गर्नुहोस्। Enter system size, local monthly peak sun hours, panel orientation, shade, and other losses to estimate daily and selected-period kWh.

आफ्नो सिस्टम र मौसम राख्नुहोस् Enter your system and season

क्षमता र घाम Capacity and solar resource

सोलारको नाममात्र DC क्षमता Solar DC nameplate capacity

त्यो महिना वा मौसमको peak sun hours Peak sun hours for that month or season

h/day

यो दिन उज्यालो रहने घण्टा होइन। आफ्नो location को मासिक solar-resource value राख्नुहोस्। This is not daylight duration. Use a monthly solar-resource value for your location.

हिसाब गर्ने दिन Days in the period

days

उत्पादन घटाउने कुरा Production losses

दिशा र tilt बाट नोक्सानी Orientation and tilt loss

छायाँबाट नोक्सानी Shade loss

अरू सिस्टम नोक्सानी Other system loss

inverter, तापक्रम, धुलो, wiring, mismatch र availability को आफ्नो कुल अनुमान राख्नुहोस्। छायाँ फेरि नजोड्नुहोस्। Enter your combined estimate for inverter, temperature, soiling, wiring, mismatch, and availability. Do not count shade twice.

उत्पादन अनुमान Energy estimate

छानिएको अवधिको ऊर्जाEnergy for the selected period 567.8 kWh 30 दिनको अनुमानday estimate

दैनिक उत्पादनDaily energy18.9 kWh

नोक्सानीअघिको दैनिक ऊर्जाIdeal daily energy23.3 kWh

जोडिएको नोक्सानीCombined loss18.8%

प्रति kW अवधि उत्पादनPeriod yield per kW113.6 kWh/kW

दिशापछिAfter orientation22.1 kWh/day

छायाँपछिAfter shade21.0 kWh/day

ध्यान दिनुहोस्Honesty note

यो छिटो planning estimate हो। बादल, प्यानलको तापक्रम, inverter clipping, grid outage, सफाइ, पुरानो प्यानल र स्थानीय छायाँका कारण वास्तविक meter reading फरक पर्छ। installer को site model र उत्पादन guarantee को ठाउँ यसले लिँदैन। This is a quick planning estimate. Clouds, module temperature, inverter clipping, grid outages, cleaning, system age, and site shade change actual meter readings. It does not replace an installer site model or production guarantee.

हिसाब कसरी हुन्छ?How the calculation works

Peak sun hour भनेको दिनभर परेको घामलाई 1 kW/m² को बराबर घण्टामा बदलेको संख्या हो। त्यसैले मौसम र ठाउँ फेरिँदा यो नम्बर पनि फेरिन्छ। A peak sun hour converts the day's solar resource into equivalent hours at 1 kW/m². It changes by location and season.

ideal daily kWh = system DC kW × peak sun hours/day
after orientation = ideal kWh × (1 − orientation loss)
after shade = after orientation × (1 − shade loss)
estimated daily kWh = after shade × (1 − other system loss)
period kWh = estimated daily kWh × number of days
combined loss = 1 − [(1 − orientation) × (1 − shade) × (1 − other)]

नोक्सानी प्रतिशतहरू सिधै जोडिँदैनन्। हरेक चरणमा बाँकी ऊर्जा घटाइन्छ। Actual tilted-plane solar value प्रयोग गर्नुभएको छ भने orientation loss शून्य राख्न मिल्छ। Loss percentages are not simply added. Each loss reduces the energy remaining from the prior step. If your solar-resource value already represents the actual tilted plane, orientation loss can be zero.

नमुना हिसाबWorked example

5 kW सिस्टम, 4.66 peak sun hours/day, दिशा र छायाँबाट 5% का दरले नोक्सानी, अरू नोक्सानी 10% र अवधि 30 दिन मानिएको छ। 4.66 नेपालको AEPC औसत हो, कुनै खास शहर वा महिनाको guarantee होइन। The example uses a 5 kW system, 4.66 peak sun hours/day, 5% each for orientation and shade loss, 10% other loss, and 30 days. AEPC reports 4.66 as a Nepal average, not a guarantee for a particular city or month.

5 × 4.66 = 23.3 kWh/dayनोक्सानीअघिको ऊर्जाenergy before losses

23.3 × 95% × 95% × 90% = 18.9 kWh/dayनोक्सानीपछिको दैनिक अनुमानdaily estimate after losses

18.9 × 30 = 567.8 kWh30 दिनको अनुमान30-day estimate

1 − (95% × 95% × 90%) = 18.8%जोडिएको असरcombined effect of losses

स्रोत र मान्यताSources and assumptions

AEPC, Planning a Solar Project, checked 21 Aug 2026. AEPC provides Nepal rooftop planning guidance and a basic sizing tool for grid-connected solar systems.
AEPC, Progress at a Glance FY 2080/81, checked 21 Aug 2026. It reports Nepal solar radiation ranging from 3.6 to 6.2 kWh/m²/day, with a 4.66 kWh/m²/day average.
University of Maryland Extension, Working on Solar Design and System Sizing, checked 21 Aug 2026. It defines peak sun hours and relates energy, system capacity, solar resource, and a derate factor.
NREL, PVWatts Version 5 Manual, checked 21 Aug 2026. It documents system losses and combines multiple percentage losses multiplicatively rather than by simple addition.
World Bank, Global Solar Atlas 2.0 Technical Report, checked 26 Aug 2026. It documents location-specific GHI and GTI solar irradiation layers in kWh/m², including horizontal and optimally tilted surfaces.

4.66 peak sun hours र 5%, 5%, 10% नोक्सानी यो नमुना चलाउन राखिएका हुन्। आफ्नो location, महिना, roof survey र equipment data अनुसार सबै बदल्नुहोस्। The 4.66 peak sun hours and 5%, 5%, and 10% losses are editable example inputs. Replace them with location, month, roof-survey, and equipment data.