{"id":222,"date":"2011-09-28T14:19:45","date_gmt":"2011-09-28T19:19:45","guid":{"rendered":"https:\/\/greenbugenergy.com\/?p=222"},"modified":"2022-05-30T11:33:59","modified_gmt":"2022-05-30T16:33:59","slug":"size-of-system-offer","status":"publish","type":"post","link":"https:\/\/greenbugenergy.com\/get-educated-skills\/size-of-system-offer","title":{"rendered":"Calculating the size of system necessary to offset your hydro bill."},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"222\" class=\"elementor elementor-222\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-462d1f1d elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"462d1f1d\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-20964630\" data-id=\"20964630\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2af18969 elementor-widget elementor-widget-text-editor\" data-id=\"2af18969\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>We will assume here you are going to remain grid connected and want to take advantage of a net metering arrangement.Your electric bill probably goes up and down monthly or seasonally, therefore it\u2019s important to consider the details of your net metering rules. If your net metering rules only allow carry forward of your electricity production on a monthly basis, then you will need a system big enough to offset your biggest monthly bill if you want to entirely offset your bill. Take your total kWh usage for the month divide by the total hours in the month (31 x 24 = 744) to get the kW\u2019s you use on an hourly basis on average for the month. This is not the size of system you need unless you know the system will run at full capacity 100% of the time. This depends upon the flows experienced at the time. However, to get a system to run 100% of the time, depending upon your flow, may require the system to be smaller, such that it will not produce the amount of kWh\u2019s to offset your bill.<\/p><p>It may be necessary to install a bigger system that will produce more kWh\u2019s but not run 100% of the time. As you increase the size of the system the capacity utilization will continue to decline. To determine the size of system you need to install you have to estimate the capacity utilization rate of the larger system. If we assume a utilization of 65% overall, then take the kW\u2019s you use on an hourly basis and divide by .65 to get the size of system you need. Keep in mind this is just an estimate. The accurate way to determine the size of system you need is to look at the estimated flows and heads for your site.<\/p><p>If your net metering rules allow carry forward and banking of excess production on an annual basis then your system likely doesn\u2019t have to be as big to entirely offset your bill. Ideally, we would look at your total kWh use for the year, and then based on your water source daily heads and flows figure out the size of system that can take advantage of those heads and flows and offset your bill on an annual basis. However, without knowing those heads and flows which vary, all we can do is look at your total kWh use annually, divide by the total number of hours in the year (365 x 24 = 8760 hours) to get the kW\u2019s you use on an hourly basis on average. This is not the size of system you need unless you know that your flows are high enough to allow this system to run at full capacity 100% of the time. This is where we have to start doing some flow measurements to see if this is true or not. If it\u2019s not, then we have to make some sort of assumption as to the overall capacity utilization a system would experience as we did before. If we assume 65% as we did before, then divide the kW\u2019s you use on an hourly basis on average for the year as determined above by .65 to get the size of system you would need to offset your bill.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Your electric bill probably goes up and down monthly or seasonally, therefore it\u2019s important to consider the details of your net metering rules.  <\/p>\n","protected":false},"author":3,"featured_media":1575,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[5,86],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Calculating the size of system necessary to offset your hydro bill. - GreenBug Energy - micro hydro<\/title>\n<meta name=\"description\" content=\"Calculating the size of system - 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