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24 ports cut mean wait to 2.25 min versus 44.76 min at 20 ports, with a 500 W panel and 2789.6 Wh bank at $2.29 per household per year; a five-day cloudy spell accrues a 6333.5 Wh deficit the bank cannot cover. Villages without reliable grid power need shared phone and lantern charging that does not collapse into queues or fail in cloudy weather.
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William Alexander Aldred (2026) studied this question.
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