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<blockquote data-quote="HB13DISH" data-source="post: 635119" data-attributes="member: 262829"><p>In Israel we have the sun and the heat, but till now these sources of energy haven't been used effectively to produce electricity.</p><p>Roof tops are being used to install these horrid solar water heaters for individual apartments. For the size and area they occupy on the roof, you would expect something better than just heating water for showers or dish washing.</p><p>They cost two to three times the cost of an indoor electric water heating system. They need more maintenance because of leaks and corrosion and they have shorter life.</p><p>The difference in price between indoor and roof top installations is balanced after ten years for saving on electricity bill, without taking into account the maintenance cost during this period.</p><p>They also waste water, especially in cold weather until hot water reaches the shower head from the roof top.</p><p>If there is a new machine that can generate solar electricity and installed on the whole area of the roof top, it would be better to get rid of all the solar water heaters so that the whole building can benefit from the generated power which can be returned to the electricity grid.</p><p>There is a new offer by the electricity board promoting the use of either solar or wind energy and they pay x3 the price of their tariff.</p><p>Question is, what can we have on a roof top that can generate electricity that would make it worth while to get rid of the solar heaters?</p><p>My estimate is that you need at most 1 KWH/day on average for each apartment to heat water for showers and other things.</p><p>(An apartment can have single, married couple and married with children. I made an average of two heads per apartment)</p><p>My building with 15 apartments is saving only 15 KWH/day by using solar heaters. Big deal !!!!</p><p>With a machine utilizing the whole roof top, I am sure that it will generate more than 15 KWH/day.</p><p>Taking into account the x3 generous offer by the electricity board, all we need is a 5 KWH/day machine to pay for the electricity.</p><p>Then there is the cost of the machine to take into account, which can be paid of in 10-20 years or even less depending on how much power it can generate.</p><p>Any suggestions or comments or flows in my suggestions would be appreciated.<img src="https://www.satellites.co.uk/styles/default/xenforo/smilies/smile.png" class="smilie" loading="lazy" alt=":)" title="Smile :)" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="HB13DISH, post: 635119, member: 262829"] In Israel we have the sun and the heat, but till now these sources of energy haven't been used effectively to produce electricity. Roof tops are being used to install these horrid solar water heaters for individual apartments. For the size and area they occupy on the roof, you would expect something better than just heating water for showers or dish washing. They cost two to three times the cost of an indoor electric water heating system. They need more maintenance because of leaks and corrosion and they have shorter life. The difference in price between indoor and roof top installations is balanced after ten years for saving on electricity bill, without taking into account the maintenance cost during this period. They also waste water, especially in cold weather until hot water reaches the shower head from the roof top. If there is a new machine that can generate solar electricity and installed on the whole area of the roof top, it would be better to get rid of all the solar water heaters so that the whole building can benefit from the generated power which can be returned to the electricity grid. There is a new offer by the electricity board promoting the use of either solar or wind energy and they pay x3 the price of their tariff. Question is, what can we have on a roof top that can generate electricity that would make it worth while to get rid of the solar heaters? My estimate is that you need at most 1 KWH/day on average for each apartment to heat water for showers and other things. (An apartment can have single, married couple and married with children. I made an average of two heads per apartment) My building with 15 apartments is saving only 15 KWH/day by using solar heaters. Big deal !!!! With a machine utilizing the whole roof top, I am sure that it will generate more than 15 KWH/day. Taking into account the x3 generous offer by the electricity board, all we need is a 5 KWH/day machine to pay for the electricity. Then there is the cost of the machine to take into account, which can be paid of in 10-20 years or even less depending on how much power it can generate. Any suggestions or comments or flows in my suggestions would be appreciated.:) [/QUOTE]
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