Sizing a Solar Lantern: Panel Watts and Battery Watt-Hours for 100 Lumens for Four Hours a Night, by Climate Class, with the Cloudy-Day Failure Line

Derives panel and battery size for 100 lm for 4 h/night: 3.899 Wh/night from battery, 2.0 Wp panel (arid tropical), 2.5 Wp (tropical humid), 4.5 Wp (temperate winter), 12.18 Wh for 2-day and 18.27 Wh for 3-day autonomy; a common 1 Wp / 3.7 Wh lantern supports only 0.55 of a night per day in the humid class. Failure line is about 4 consecutive cloudy days.

Authors

Publication Details

Journal
Zenodo (CERN European Organization for Nuclear Research)
Published
2026-11-10
DOI
https://doi.org/10.5281/zenodo.24113259
Primary Topic
Power Systems and Renewable Energy
Type
article
Field-Weighted Citation Impact
0.00
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article

Sizing a Solar Lantern: Panel Watts and Battery Watt-Hours for 100 Lumens for Four Hours a Night, by Climate Class, with the Cloudy-Day Failure Line

William Alexander Aldred
Zenodo (CERN European Organization for Nuclear Research)
Power Systems and Renewable Energy
article

Sizing a Solar Lantern: Panel Watts and Battery Watt-Hours for 100 Lumens for Four Hours a Night, by Climate Class, with the Cloudy-Day Failure Line

William Alexander Aldred
article en

Abstract

Derives panel and battery size for 100 lm for 4 h/night: 3.899 Wh/night from battery, 2.0 Wp panel (arid tropical), 2.5 Wp (tropical humid), 4.5 Wp (temperate winter), 12.18 Wh for 2-day and 18.27 Wh for 3-day autonomy; a common 1 Wp / 3.7 Wh lantern supports only 0.55 of a night per day in the humid class. Failure line is about 4 consecutive cloudy days.

Zenodo (CERN European Organization for Nuclear Research)
Power Systems and Renewable Energy
DOIOpen Access PDFOpenAlex
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Sizing a Solar Lantern: Panel Watts and Battery Watt-Hours for 100 Lumens for Four Hours a Night, by Climate Class, with the Cloudy-Day Failure Line — William Alexander Aldred · Zenodo (CERN European Organization for Nuclear Research) (2026) | TGRS Research Map | TGRS