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<blockquote data-quote="HB13DISH" data-source="post: 635654" data-attributes="member: 262829"><p>Thanks Crisbe. <img src="https://www.satellites.co.uk/styles/default/xenforo/smilies/smile.png" class="smilie" loading="lazy" alt=":)" title="Smile :)" data-shortname=":)" /></p><p>I take it that this size 6mtrs x 4mtrs is the one mentioned in your previous post which has a 2.5 KW maximum output.</p><p></p><p><strong><span style="color: Navy">Just trying to do the maths:</span></strong></p><p>I haven't checked the cost of a similar installation in Israel, but let us assume it is the same here, then with a rate of exchange of 7 NIS/Pound, the cost for the whole building is</p><p>13000x7=91,000 NIS</p><p>As we have 15 apartments, then cost / apartment = 6066 NIS, which is a lot of money for anybody these days if paid in one lump, but might be OK if paid over a five year period (60 months) as each installment is ~ 100 NIS and each apartment gets back 60 NIS / month for "selling" electricity, which means each apartment pays only 40 NIS/month which is excellent. (see calculations below)</p><p>If we get on average 8 hours of daylight (sunshine)/day, we would have:</p><p>2.5 KW x 8 Hours = 20 KWH/Day</p><p>The current cost of KWH is 0.5 NIS, but we will get x3 this tarrif = 1.5 NIS per KWH > 20x1.5= 30 NIS/Day > 2 NIS/Day/Apartment</p><p>91,000 NIS Divided by 30 = 3033 Days > 8.3 Years to break even.</p><p>Either I made a mistake in my calculations or this size has higher output than 2.5KW.</p><p>At any rate, if this is correct, then it seems that this is certainly not such a good bargain, as people would expect a much shorter break even period, something like 2-3 years, otherwise they will not go for it.</p><p></p><p>If we get rid of all the solar water systems in order to have a much larger area to put more solar panels, then we would need to pay a lot more money for the installation cost.</p><p>Will wait for a much cheaper solution or better offers by the authorities.</p></blockquote><p></p>
[QUOTE="HB13DISH, post: 635654, member: 262829"] Thanks Crisbe. :) I take it that this size 6mtrs x 4mtrs is the one mentioned in your previous post which has a 2.5 KW maximum output. [B][COLOR=Navy]Just trying to do the maths:[/COLOR][/B] I haven't checked the cost of a similar installation in Israel, but let us assume it is the same here, then with a rate of exchange of 7 NIS/Pound, the cost for the whole building is 13000x7=91,000 NIS As we have 15 apartments, then cost / apartment = 6066 NIS, which is a lot of money for anybody these days if paid in one lump, but might be OK if paid over a five year period (60 months) as each installment is ~ 100 NIS and each apartment gets back 60 NIS / month for "selling" electricity, which means each apartment pays only 40 NIS/month which is excellent. (see calculations below) If we get on average 8 hours of daylight (sunshine)/day, we would have: 2.5 KW x 8 Hours = 20 KWH/Day The current cost of KWH is 0.5 NIS, but we will get x3 this tarrif = 1.5 NIS per KWH > 20x1.5= 30 NIS/Day > 2 NIS/Day/Apartment 91,000 NIS Divided by 30 = 3033 Days > 8.3 Years to break even. Either I made a mistake in my calculations or this size has higher output than 2.5KW. At any rate, if this is correct, then it seems that this is certainly not such a good bargain, as people would expect a much shorter break even period, something like 2-3 years, otherwise they will not go for it. If we get rid of all the solar water systems in order to have a much larger area to put more solar panels, then we would need to pay a lot more money for the installation cost. Will wait for a much cheaper solution or better offers by the authorities. [/QUOTE]
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