{"id":23223,"date":"2021-09-03T08:56:39","date_gmt":"2021-09-03T06:56:39","guid":{"rendered":"https:\/\/www.victronenergy.com\/blog\/?p=23223"},"modified":"2021-10-05T18:47:27","modified_gmt":"2021-10-05T16:47:27","slug":"farm-estate-aims-for-carbon-zero","status":"publish","type":"post","link":"https:\/\/www.victronenergy.com\/blog\/2021\/09\/03\/farm-estate-aims-for-carbon-zero\/","title":{"rendered":"Farm Estate aims for Carbon Zero"},"content":{"rendered":"<p>Simon Hackett is aiming to make his 170 acre\u00a0Tasmanian estate energy self-sufficient. There are a number of dwellings; outbuildings; farm sheds for sheep and cattle farming; electric vehicles &#8211; and, unusually, an electric-motor powered self-launching glider, which he flies from his own runway.<\/p>\n<p>Simon is the architect behind the <a href=\"https:\/\/redflow.com\" target=\"_blank\">Redflow<\/a>\u00a0Battery Management System. Redflow manufacture modular ZBM2 zinc bromine batteries &#8211; 10kWh units which can be cycled 100% in harsh conditions. Twenty-eight of them (280kWh) provide the energy storage for Simon&#8217;s own system.<\/p>\n<h4>System Components<\/h4>\n<ul>\n<li>Three-phase grid feed via a 500kVA transformer (configured for up to 200kWp export)<\/li>\n<li>266 x LG 375W panels provide\u00a0100kWp. (Additional 100kWp solar array under construction)<\/li>\n<li>4 x 25kWp Fronius Symo AC Inverters<\/li>\n<li>12 x Victron <a href=\"https:\/\/www.victronenergy.com\/inverters-chargers\/quattro\" target=\"_blank\">Quattro 48\/15000<\/a>\u00a0totalling 180 kVA<\/li>\n<li>28 x 10kWh Redflow ZBM2 zinc-bromine energy storage modules totalling\u00a0280 kWh<\/li>\n<li><a href=\"https:\/\/www.victronenergy.com\/panel-systems-remote-monitoring\/cerbo-gx\" target=\"_blank\">Cerbo GX<\/a> system controller interfaced to 3 x Redflow Battery Management System units<\/li>\n<li>Underground sub-main distribution system servicing houses, farm buildings and an aircraft hangar<\/li>\n<li>Underground site-wide single-mode optical fibre network serving site-wide indoor and outdoor WiFi access points and networked access control and building management systems<\/li>\n<li>Provision for generator<\/li>\n<\/ul>\n<div id=\"attachment_23228\" style=\"width: 1034px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/8A20C359-E80D-4AFF-9BC8-C876064DA931_1_102_a_172008495.jpeg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-23228\" class=\"wp-image-23228 size-large\" src=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/8A20C359-E80D-4AFF-9BC8-C876064DA931_1_102_a_172008495-1024x804.jpeg\" alt=\"\" width=\"1024\" height=\"804\" srcset=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/8A20C359-E80D-4AFF-9BC8-C876064DA931_1_102_a_172008495-1024x804.jpeg 1024w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/8A20C359-E80D-4AFF-9BC8-C876064DA931_1_102_a_172008495-1500x1177.jpeg 1500w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/8A20C359-E80D-4AFF-9BC8-C876064DA931_1_102_a_172008495-750x589.jpeg 750w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/8A20C359-E80D-4AFF-9BC8-C876064DA931_1_102_a_172008495-1536x1205.jpeg 1536w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/8A20C359-E80D-4AFF-9BC8-C876064DA931_1_102_a_172008495-300x235.jpeg 300w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/8A20C359-E80D-4AFF-9BC8-C876064DA931_1_102_a_172008495.jpeg 2002w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><p id=\"caption-attachment-23228\" class=\"wp-caption-text\">Simon Hackett<\/p><\/div>\n<p>The system was installed by\u00a0<a href=\"https:\/\/tasmaniansolar.com.au\/\" target=\"_blank\" rel=\"noreferrer noopener\">DMS Energy<\/a>\u00a0of Tasmania. Simon says it looks great and works brilliantly.\u00a0Here he tells us about his system and its performance:<\/p>\n<h4>Flow Batteries<\/h4>\n<div id=\"attachment_23227\" style=\"width: 1034px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/E5FC83AA-4F27-46B2-9DAB-A42DC7DEE556_1_102_a_172008481.jpeg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-23227\" class=\"wp-image-23227 size-large\" src=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/E5FC83AA-4F27-46B2-9DAB-A42DC7DEE556_1_102_a_172008481-1024x768.jpeg\" alt=\"\" width=\"1024\" height=\"768\" srcset=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/E5FC83AA-4F27-46B2-9DAB-A42DC7DEE556_1_102_a_172008481-1024x768.jpeg 1024w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/E5FC83AA-4F27-46B2-9DAB-A42DC7DEE556_1_102_a_172008481-1500x1124.jpeg 1500w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/E5FC83AA-4F27-46B2-9DAB-A42DC7DEE556_1_102_a_172008481-750x562.jpeg 750w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/E5FC83AA-4F27-46B2-9DAB-A42DC7DEE556_1_102_a_172008481-1536x1151.jpeg 1536w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/E5FC83AA-4F27-46B2-9DAB-A42DC7DEE556_1_102_a_172008481-300x225.jpeg 300w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/E5FC83AA-4F27-46B2-9DAB-A42DC7DEE556_1_102_a_172008481.jpeg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><p id=\"caption-attachment-23227\" class=\"wp-caption-text\">Zinc Bromide Flow Batteries<\/p><\/div>\n<p><em>The system stores surplus energy in Redflow Zinc-Bromine flow batteries.\u00a0These batteries have a lot of advantages compared to Lithium batteries, for stationary energy storage applications such as this one.<\/em><\/p>\n<h4>System Performance and Future Plans<\/h4>\n<div id=\"attachment_23233\" style=\"width: 1034px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-23233\" class=\"wp-image-23233 size-full\" src=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/A2823421-B3B4-43DE-B167-FA1AB3ADD9D8_1_105_c_172008770.jpeg\" alt=\"\" width=\"1024\" height=\"768\" srcset=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/A2823421-B3B4-43DE-B167-FA1AB3ADD9D8_1_105_c_172008770.jpeg 1024w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/A2823421-B3B4-43DE-B167-FA1AB3ADD9D8_1_105_c_172008770-750x563.jpeg 750w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/A2823421-B3B4-43DE-B167-FA1AB3ADD9D8_1_105_c_172008770-300x225.jpeg 300w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><p id=\"caption-attachment-23233\" class=\"wp-caption-text\"><\/div><\/a> Ground-mounted solar panels;\u00a0outdoor-mounted Fronius 3-phase solar inverters; and grass-mounted Border Collie <em>Rainee<\/em>.<\/p><\/div>\n<p><em>We decided to deploy a relatively large solar array with the aim of obtaining adequate overall performance in the winter months. Our panels are\u00a0also our renewable transport fuel station for a Tesla Model S sedan; a Polaris \u2018Ranger\u2019 electric ATV; and <a href=\"https:\/\/simonhackett.com\/2020\/09\/30\/flying-on-electric-avenue\/\" target=\"_blank\" rel=\"noreferrer noopener\">an electric aircraft<\/a>.<\/em><\/p>\n<p><em>Our plan is to progressively eliminate the use of diesel by running electric 4WD vehicles, tractors, and excavators as they become available in Australia. The beauty of the large on-site solar array is that all of these vehicles can be charging when they are not being driven.<\/em><\/p>\n<p><em>During this winter, typically, we manage to half-fill the battery array &#8211; which lasts about half the night before grid energy is required.\u00a0Doubling the solar array should allow us to supply all energy demands on most days without drawing any grid energy.<\/em><\/p>\n<p><em>In the summer we\u2019ll be exporting plenty of energy &#8211; and being paid to do so.<\/em><\/p>\n<p><em>Here are some (summer time) screen shots from the on-site control system and from the outstanding Victron Remote Management (<a href=\"https:\/\/vrm.victronenergy.com\/landingpage\" target=\"_blank\">VRM)<\/a>\u00a0data logging portal.<a href=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/637F8F8E-FAF1-413C-96FF-1F63D31AF17F_172008531.png\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-23230\" src=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/637F8F8E-FAF1-413C-96FF-1F63D31AF17F_172008531-473x1024.png\" alt=\"\" width=\"473\" height=\"1024\" srcset=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/637F8F8E-FAF1-413C-96FF-1F63D31AF17F_172008531-473x1024.png 473w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/637F8F8E-FAF1-413C-96FF-1F63D31AF17F_172008531-750x1623.png 750w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/637F8F8E-FAF1-413C-96FF-1F63D31AF17F_172008531-946x2048.png 946w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/637F8F8E-FAF1-413C-96FF-1F63D31AF17F_172008531-710x1536.png 710w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/637F8F8E-FAF1-413C-96FF-1F63D31AF17F_172008531-139x300.png 139w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/637F8F8E-FAF1-413C-96FF-1F63D31AF17F_172008531.png 1170w\" sizes=\"auto, (max-width: 473px) 100vw, 473px\" \/><\/a><\/em><\/p>\n<p><a href=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/C7436E34-6AC8-4FCF-A181-5B3D27FEB6CE_172008541.png\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-23231\" src=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/C7436E34-6AC8-4FCF-A181-5B3D27FEB6CE_172008541-1024x614.png\" alt=\"\" width=\"1024\" height=\"614\" srcset=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/C7436E34-6AC8-4FCF-A181-5B3D27FEB6CE_172008541-1024x614.png 1024w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/C7436E34-6AC8-4FCF-A181-5B3D27FEB6CE_172008541-750x449.png 750w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/C7436E34-6AC8-4FCF-A181-5B3D27FEB6CE_172008541-300x180.png 300w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/C7436E34-6AC8-4FCF-A181-5B3D27FEB6CE_172008541.png 1038w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p><em>On VRM\u00a0you can see the solar array producing more than 90kW, the battery bank was mostly full with a tapered charge-rate, and plenty of solar energy was being exported to the grid.<\/em><\/p>\n<p><em>The \u2018System Overview\u2019 and \u2018Consumption\u2019 charts show the battery ending the day pretty much full, the site ran all night on \u2018stored sunshine\u2019 and started the following day half-full.<\/em><\/p>\n<p><em>We exported plenty of green energy to our neighbours and we used practically no energy from the grid.<\/em><\/p>\n<p><em>Once all our vehicles are electric our total export energy will be less, but that will be more than offset by savings on diesel &#8211; and we won&#8217;t be emitting CO2 or Diesel particulates.<\/em><\/p>\n<h4>On-site Energy Efficiency<\/h4>\n<p><em>All the houses on the farm are heated\/cooled using heat pumps.\u00a0This is the most efficient way to do it, by far, and it&#8217;s often poorly understood just how much more efficient a heat pump is than other cooling\/heating systems.<\/em><\/p>\n<p><em>A heat pump doesn\u2019t create\u00a0heat \u2013 \u00a0it moves heat energy from the outside environment into the house (or vice versa, to cool it). Typically, 3-4 kilowatts of heating or cooling are gained for each kilowatt of energy used by the heat pump.<\/em><\/p>\n<p><em>We have a Spa pool which need a fair bit of energy to keep hot, and we have done two things to minimise that energy draw.<\/em><\/p>\n<p><em>First, we have used a <a href=\"https:\/\/spanet.com.au\/sv-heat-pumps\/\" target=\"_blank\" rel=\"noreferrer noopener\">Spa heat pump<\/a> to do the water heating, offering similar efficiency to the heat pumps.<\/em><\/p>\n<p><em>Second, we have installed a monitoring and control device so we can remotely control it &#8211; turning the heating off when we are leaving home, and turning the heating back on before returning &#8211; so it&#8217;s nice and hot when we arrive.<\/em><\/p>\n<p><em>We use a\u00a0<a href=\"https:\/\/www.sanden-hot-water.com.au\/\" target=\"_blank\" rel=\"noreferrer noopener\">Sanden Heat Pump<\/a>\u00a0heat pump for domestic hot water &#8211; which\u00a0performs really well.<\/em><\/p>\n<h4>On-site Energy Monitoring and Control<\/h4>\n<div id=\"attachment_23232\" style=\"width: 1034px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-23232\" class=\"wp-image-23232 size-full\" src=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/B2C77ABD-7D4F-4587-9818-EE02A2AD272A_1_105_c_172008550.jpeg\" alt=\"\" width=\"1024\" height=\"768\" srcset=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/B2C77ABD-7D4F-4587-9818-EE02A2AD272A_1_105_c_172008550.jpeg 1024w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/B2C77ABD-7D4F-4587-9818-EE02A2AD272A_1_105_c_172008550-750x563.jpeg 750w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/08\/B2C77ABD-7D4F-4587-9818-EE02A2AD272A_1_105_c_172008550-300x225.jpeg 300w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><p id=\"caption-attachment-23232\" class=\"wp-caption-text\"><\/div><\/a> GX Touch 50<\/p><\/div>\n<p><em>The key to optimising energy usage is to be able to measure it.<\/em><\/p>\n<p><em>The\u00a0Cerbo GX\u00a0monitors all aspects of our renewable power plant in detail.\u00a0This provides us with detailed evaluation of energy generation, storage, and consumption.\u00a0We have a lot of separate buildings on the farm, and the key to understanding energy draw in each is provided by a number of Carlo Gavazzi EM24 ethernet interfaced energy meters so that energy usage can be narrowed down to each of these buildings with ease.<\/em><\/p>\n<p><em>I am currently working on the design of a monitoring system to provide me with detailed analytics of where our energy is going on a per-building basis, and when.<\/em><\/p>\n<p><em>We have deployed <a href=\"https:\/\/www.knx.org\/\" target=\"_blank\" rel=\"noreferrer noopener\">KNX<\/a> based sensor and control devices around the property and plan to install more so that we\u2019ll be able to control and optimise our energy consumption in a variety of useful ways.\u00a0KNX\u00a0is an extremely good way to implement building automation using a 30+ year old standardised protocol with full backwards compatibility, with support from over 500 hardware manufacturers.<\/em><\/p>\n<p><em>With the upcoming enhancements in site monitoring and control, we expect to deepen our understanding of where energy is being used, to (in turn) allow us to further optimise that usage, using techniques as simple as moving various high energy demands to run \u2018under the solar curve\u2019 wherever possible. These are the times when on-site energy usage is essentially \u2018free\u2019 (avoiding the \u2018energy round trip\u2019 via the battery, and leaving more battery capacity for energy demands that cannot be time-shifted overnight)<\/em><\/p>\n<p><em>In summary, our system is performing extremely well, and we are extremely pleased with it.\u00a0When we have added even more solar, it will do even better.<\/em><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Simon Hackett is aiming to make his 170 acre\u00a0Tasmanian estate energy self-sufficient. There are a number of dwellings; outbuildings; farm sheds for sheep and cattle farming; electric vehicles &#8211; and, unusually, an electric-motor powered self-launching glider, which he flies from his own runway. Simon is the architect behind the Redflow\u00a0Battery Management System. Redflow manufacture modular [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":23226,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[113],"tags":[144],"class_list":["post-23223","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-off-grid"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Farm Estate aims for Carbon Zero - Victron Energy<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.victronenergy.com\/blog\/2021\/09\/03\/farm-estate-aims-for-carbon-zero\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Farm Estate aims for Carbon Zero - Victron Energy\" \/>\n<meta property=\"og:description\" content=\"Simon Hackett is aiming to make his 170 acre\u00a0Tasmanian estate energy self-sufficient. 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