October 3, 2013

Letter from Reader

Good day, Nick.
I am a South African electronics engineer who has retired. Having done a bit of research I established that a typical 4 person household (with a standard geyser) uses 18KW/Hr, daily. In this country that translates into R1,000-00 per month or roughly $100-00, US.

If recent trends are followed then in ten years this will be $351, very approximately. Using solar power and batteries known for long life (note, a duty cycle of 25%) the payback point will be achieved after eight years.

In that household the regular consumption is 2KW (all figures are in KW/hour) with short term peaks going up to 12KW. Thus the inverter must cope with surges up to 15 KW. As mentioned (and this is well researched) a typical 4 person household uses 18KW. This is the house. If one is on a farm or not, the household will use the same amount.

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$192.98 (as of May 1, 2024 04:58 GMT +01:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)

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$23.00 (as of May 1, 2024 04:58 GMT +01:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)

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200W Portable Power Station, Powkey 120Wh/33,000mAh Power Bank with AC Outlet, 110V 6 Outputs Solar Generator External Battery Pack with LED Light for Home Use and Outdoor Camping

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31% Off $149.99 $102.99 (as of May 1, 2024 04:58 GMT +01:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)

120WH CAPACITY: The power station