{"id":17873,"date":"2019-09-19T09:02:40","date_gmt":"2019-09-19T07:02:40","guid":{"rendered":"https:\/\/www.victronenergy.com\/blog\/?p=17873"},"modified":"2024-12-02T13:57:43","modified_gmt":"2024-12-02T11:57:43","slug":"msol-gmbh-a-pv-energy-storage-ups-project","status":"publish","type":"post","link":"https:\/\/www.victronenergy.com\/blog\/2019\/09\/19\/msol-gmbh-a-pv-energy-storage-ups-project\/","title":{"rendered":"Msol GmbH &#8211; A PV, Energy Storage &amp; UPS project"},"content":{"rendered":"<p>It&#8217;s great to hear from Victron Energy customers, be they end users, dealers or indeed budding dealers and installers.<\/p>\n<p>Here&#8217;s a case in point. Bernhard Matschinger got in touch with me lauding Victron&#8217;s products, which initially led him to build his own PV, Energy Storage UPS system and ultimately his own company &#8211; Msol GmbH. For Bernhard this project was a prototype and proof of concept, as it uses non Victron Energy batteries\/BMS. That being the case, this gives rise to important safety and system integration considerations. More of that later, but first a bit of history.<\/p>\n<h3>Where it all started<\/h3>\n<p>Back in 2013, when Bernhard saw his first &#8216;<a href=\"http:\/\/www.mjlorton.com\/\" target=\"_blank\">mjlorton<\/a>&#8216; video on <a href=\"https:\/\/www.youtube.com\/user\/mjlorton\/videos\" target=\"_blank\">YouTube<\/a> (228K subscribers) he became fascinated by Victron Products. Here&#8217;s an example video from that time.<\/p>\n\n<!-- iframe plugin v.6.0 wordpress.org\/plugins\/iframe\/ -->\n<iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/qjO6gJCCWNc\" width=\"100%\" height=\"400\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\" scrolling=\"yes\" class=\"iframe-class\"><\/iframe>\n\n<p>Bernhard is a qualified Civil Engineer with 25 years experience in designing\/building low energy homes and industrial buildings. Having been the CTO of a construction company for many years he also made his IT hobby into a profession too, around 10 years ago. So now he has two strings to his bow<span class=\"ILfuVd\"><span class=\"e24Kjd\"> &#8211; one in design and construction, the other<\/span><\/span> creating software based on C#, .Net for Web and ERP.<\/p>\n<p>Due to his experience it was natural for him to want his own PV, Energy Storage &amp; UPS system &#8211; so he built one.<\/p>\n<h3>System background<\/h3>\n<p>Eight years ago Bernhard and his wife built their own low energy family home from scratch, doing nearly all the work themselves.<\/p>\n<p><a href=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Matschinger-Home_111969954.jpg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-blogpost-single wp-image-17900\" src=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Matschinger-Home_111969954-750x497.jpg\" alt=\"\" width=\"750\" height=\"497\" srcset=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Matschinger-Home_111969954-750x497.jpg 750w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Matschinger-Home_111969954.jpg 1500w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Matschinger-Home_111969954-1024x679.jpg 1024w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Matschinger-Home_111969954-768x509.jpg 768w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Matschinger-Home_111969954-300x199.jpg 300w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/a><\/p>\n<p>The area of their home is 255 m\u00b2, which per annum requires around 2,300 kWh of electricity (6.3 kWh\/day), plus 2,600 kWh (7.12kWh\/day) for hot water &#8211; giving a total of 13.42 kWh\/day of electrical energy needs. For space heating they use around 500 kg of wood pellets per annum.<\/p>\n<p>The resulting direct energy costs are around 100 \u20ac for heating per year, 260 \u20ac for hot water (5 persons) and about 320 \u20ac \/ year for grid energy. That equates to about 1.86 \u20ac per day for heat and electricity &#8211; significantly less than their neighbours in the region. However when the family got a Tesla Model S, energy usage increased somewhat.<\/p>\n<div id=\"attachment_17898\" style=\"width: 760px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Tesla_111969832.jpg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-17898\" class=\"wp-image-17898 size-blogpost-single\" src=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Tesla_111969832-750x739.jpg\" alt=\"\" width=\"750\" height=\"739\" srcset=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Tesla_111969832-750x739.jpg 750w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Tesla_111969832.jpg 1500w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Tesla_111969832-1024x1008.jpg 1024w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Tesla_111969832-768x756.jpg 768w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Tesla_111969832-300x295.jpg 300w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/a><p id=\"caption-attachment-17898\" class=\"wp-caption-text\">Tesla Model S charging<\/p><\/div>\n<p>With these increased energy needs and since building their home, Bernhard had always been looking for some grid independence, with ways to reduce direct energy costs, plus a route to ensure no power blackouts.<\/p>\n<p>Standalone PV made little sense, as in the day the family is mostly away from home when excess solar power is available, plus feeding back to the grid pays peanuts at 3.9 cents per kWh. Everything changed though when he discovered Victron products &#8211; a result of lots of YouTube research, website surfing, drawings, calculations and finally discovering the Victron MultiPlus &#8211; one of his favourite bits of kit that has just what he needs.<\/p>\n<h3>Time for some shopping<\/h3>\n<div id=\"attachment_17901\" style=\"width: 760px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Shopping_111970436.jpg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-17901\" class=\"wp-image-17901 size-blogpost-single\" src=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Shopping_111970436-750x563.jpg\" alt=\"\" width=\"750\" height=\"563\" srcset=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Shopping_111970436-750x563.jpg 750w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Shopping_111970436.jpg 1500w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Shopping_111970436-1024x768.jpg 1024w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Shopping_111970436-768x576.jpg 768w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Shopping_111970436-300x225.jpg 300w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/a><p id=\"caption-attachment-17901\" class=\"wp-caption-text\">Retail therapy&#8230;<\/p><\/div>\n<p>The primary shopping list:<\/p>\n<ul>\n<li>3 x <a href=\"https:\/\/www.victronenergy.com\/inverters-chargers\/multiplus-ii\" target=\"_blank\">MultiPlus-II<\/a><\/li>\n<li>1 x <a href=\"https:\/\/www.victronenergy.com\/solar-charge-controllers\/bluesolar-mppt-150-35\" target=\"_blank\">BlueSolar 150\/45 MPPT <\/a><\/li>\n<li>1 x <a href=\"https:\/\/www.victronenergy.com\/panel-systems-remote-monitoring\/color-control\" target=\"_blank\">Color Control GX<\/a><\/li>\n<li>24 x 280 Wp Solar Panels<\/li>\n<li>16 x\u00a0 LiFeYPo4 cells 260 Ah<\/li>\n<li>1 x SolarEdge 5kW + 18 Optimizer<\/li>\n<li>1 x Active BMS by AutarcTech<\/li>\n<\/ul>\n<h3>The build<\/h3>\n<div id=\"attachment_17905\" style=\"width: 760px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Family-solar_111971822.jpg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-17905\" class=\"wp-image-17905 size-blogpost-single\" src=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Family-solar_111971822-750x563.jpg\" alt=\"\" width=\"750\" height=\"563\" srcset=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Family-solar_111971822-750x563.jpg 750w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Family-solar_111971822.jpg 1500w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Family-solar_111971822-1024x768.jpg 1024w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Family-solar_111971822-768x576.jpg 768w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Family-solar_111971822-300x225.jpg 300w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/a><p id=\"caption-attachment-17905\" class=\"wp-caption-text\">Every carport array needs a little solar helper&#8230;<\/p><\/div>\n<div id=\"attachment_17906\" style=\"width: 760px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Solar-install_111972027.jpg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-17906\" class=\"wp-image-17906 size-blogpost-single\" src=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Solar-install_111972027-750x497.jpg\" alt=\"\" width=\"750\" height=\"497\" srcset=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Solar-install_111972027-750x497.jpg 750w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Solar-install_111972027.jpg 1500w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Solar-install_111972027-1024x679.jpg 1024w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Solar-install_111972027-768x509.jpg 768w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Solar-install_111972027-300x199.jpg 300w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/a><p id=\"caption-attachment-17906\" class=\"wp-caption-text\">A very neat installation.<\/p><\/div>\n<div id=\"attachment_17907\" style=\"width: 760px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Cells_111972178.jpg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-17907\" class=\"wp-image-17907 size-blogpost-single\" src=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Cells_111972178-750x563.jpg\" alt=\"\" width=\"750\" height=\"563\" srcset=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Cells_111972178-750x563.jpg 750w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Cells_111972178.jpg 1500w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Cells_111972178-1024x768.jpg 1024w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Cells_111972178-768x576.jpg 768w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Cells_111972178-300x225.jpg 300w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/a><p id=\"caption-attachment-17907\" class=\"wp-caption-text\">Documenting the first 8 of 16 battery cells being equalised.<\/p><\/div>\n<div id=\"attachment_18044\" style=\"width: 510px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Berhard_112572325.png\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-18044\" class=\"wp-image-18044\" src=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Berhard_112572325.png\" alt=\"\" width=\"500\" height=\"460\" srcset=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Berhard_112572325.png 544w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Berhard_112572325-300x276.png 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><p id=\"caption-attachment-18044\" class=\"wp-caption-text\">The battery housing is made of 6 mm Promatect (a fire resistant material) which is designed for 60 min fire resistance.<\/p><\/div>\n<div id=\"attachment_17908\" style=\"width: 760px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Preperation_111972376.jpg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-17908\" class=\"wp-image-17908 size-blogpost-single\" src=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Preperation_111972376-750x563.jpg\" alt=\"\" width=\"750\" height=\"563\" srcset=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Preperation_111972376-750x563.jpg 750w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Preperation_111972376.jpg 1500w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Preperation_111972376-1024x768.jpg 1024w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Preperation_111972376-768x576.jpg 768w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Preperation_111972376-300x225.jpg 300w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/a><p id=\"caption-attachment-17908\" class=\"wp-caption-text\">Mounting the Multis, cable trunking and starting to create the fire-resistant housing and rack for the battery cells.<\/p><\/div>\n<div id=\"attachment_17909\" style=\"width: 760px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Cabling_111972566.jpg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-17909\" class=\"wp-image-17909 size-blogpost-single\" src=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Cabling_111972566-750x563.jpg\" alt=\"\" width=\"750\" height=\"563\" srcset=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Cabling_111972566-750x563.jpg 750w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Cabling_111972566.jpg 1500w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Cabling_111972566-1024x768.jpg 1024w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Cabling_111972566-768x576.jpg 768w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Cabling_111972566-300x225.jpg 300w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/a><p id=\"caption-attachment-17909\" class=\"wp-caption-text\">Sturdy 70mm\u00b2 cables.<\/p><\/div>\n<div id=\"attachment_17910\" style=\"width: 760px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/BMS_111972671.jpg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-17910\" class=\"wp-image-17910 size-blogpost-single\" src=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/BMS_111972671-750x563.jpg\" alt=\"\" width=\"750\" height=\"563\" srcset=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/BMS_111972671-750x563.jpg 750w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/BMS_111972671.jpg 1500w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/BMS_111972671-1024x768.jpg 1024w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/BMS_111972671-768x576.jpg 768w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/BMS_111972671-300x225.jpg 300w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/a><p id=\"caption-attachment-17910\" class=\"wp-caption-text\">BMS data collection &#8211; Software C#, written by Bernhard.<\/p><\/div>\n<div id=\"attachment_17911\" style=\"width: 760px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/CCGX_111972729.jpg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-17911\" class=\"wp-image-17911 size-blogpost-single\" src=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/CCGX_111972729-750x777.jpg\" alt=\"\" width=\"750\" height=\"777\" srcset=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/CCGX_111972729-750x777.jpg 750w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/CCGX_111972729.jpg 1500w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/CCGX_111972729-988x1024.jpg 988w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/CCGX_111972729-768x796.jpg 768w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/CCGX_111972729-290x300.jpg 290w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/a><p id=\"caption-attachment-17911\" class=\"wp-caption-text\">Up and running with the Color Control GX.<\/p><\/div>\n<h3>Safety &amp; system integration considerations<\/h3>\n<p>With many people now wishing to use second-life batteries (Tesla for example) or indeed new individual cells made into a self-build battery bank, as Berhnard has done &#8211; it is very important to be aware of the safety considerations when integrating Victron Energy power products with non Victron batteries and a non Victron supported BMS.<\/p>\n<p>Prior to publishing this blog, we wanted to be certain Bernhard had catered for key safety aspects with his choice of battery\/cells &#8211; so, we asked:<\/p>\n<p>&#8220;Can you confirm if you have installed a safety contactor between the battery and the rest of system, and how that is switched?&#8221;<\/p>\n<p>Bernhard responded:<\/p>\n<p>&#8220;It is absolutely independent, and yes, there are all breaks on the positive side. The negative side is connected to the common negative pole and is not switchable; all fusing (also the CCGX, the MPPT and the 3 x MultiPlus-II) is done on the positive side. There is a 200A Fuse inside the Battery housing, a manual Contactor (Emergency Switch) and an automatic Relay Contact, driven by the BMS. The cabling is 70 mm\u00b2 oilflex copper cabling with 3 safety layers.&#8221;<\/p>\n<p>&#8220;As regards the active BMS by AutarcTech, it monitors each cell for voltage and temperature; plus it monitors the whole bank for max charge and discharge current, over and under voltage and over and under temperature. It also operates the main contactor.&#8221;<\/p>\n<p>Bernhard also wrote his own software in Python and C# to collect data from the AutarcTech BMS, to display that data in Visu.<\/p>\n<div id=\"attachment_18072\" style=\"width: 760px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Visu_112651743.png\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-18072\" class=\"wp-image-18072 size-blogpost-single\" src=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Visu_112651743-750x371.png\" alt=\"\" width=\"750\" height=\"371\" srcset=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Visu_112651743-750x371.png 750w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Visu_112651743-768x380.png 768w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Visu_112651743-300x149.png 300w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Visu_112651743.png 822w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/a><p id=\"caption-attachment-18072\" class=\"wp-caption-text\">Bernhard&#8217;s software, using Visu to display the data for his own personal interest which shows the behaviour of the cells: voltage, charging, discharging or inactive state.<\/p><\/div>\n<p>Note: specific information about non Victron, yet compatible batteries that have been tested and are supported can be found <a href=\"https:\/\/www.victronenergy.com\/live\/battery_compatibility:start\" target=\"_blank\">here<\/a>.<\/p>\n<p>Now let&#8217;s deal with all the caveats, from a Victron viewpoint, that relate to similar systems to Bernhard&#8217;s and integration with Victron products.<\/p>\n<h3>Victron Energy safety &amp; liability statement<\/h3>\n<p>Here&#8217;s what Matthijs Vader, Victron Energy MD had to say:<\/p>\n<p>&#8220;To make for a safe lithium system; there must be a mechanism in place that automatically disconnects the battery from the rest of the system on cell under-voltage, over voltage and also on cell-temperature issues as well as other adverse conditions. This means that the voltage on each cell needs to be measured individually. And also temperature needs to be measured and monitored; preferably at cell level, but usually it is also OK to measure it for a certain number of cells together.<\/p>\n<p>Those measurements must be taken care of by a BMS. At Victron we do make BMS-es, but they are only to be used with our own batteries. We do not make general purpose BMS-es. Also, the under voltage lockout of an inverter, and the over voltage protection in a battery charger can *not* substitute a BMS: both only measure total battery voltage, rather than the required individual cell voltages, and temperatures. Finally, the BMS must control a contactor, that disconnects the battery from the rest of the system.<\/p>\n<p>Please take this seriously, any Tesla or other cell over and under voltage can lead to explosive fires and other severe issues.<\/p>\n<p>For which at Victron we take zero responsibility and also accept no liability at all. It&#8217;s the responsibility of a BMS to disconnect the battery in case of issues; not of the Victron equipment.<\/p>\n<p>I&#8217;d like to help by recommending BMS-es; and I know that at least one company you can consider is REC-BMS: <a href=\"https:\/\/www.rec-bms.com\/\" target=\"_blank\">https:\/\/www.rec-bms.com\/<\/a>. And I&#8217;m sure others active here will have more recommendations.<\/p>\n<p>Lastly, note that there is a distinction between the aggressive chemistries (like in the Tesla cells) and the &#8220;safer&#8221; LFP chemistry. Definitively for the aggressive ones you need safety measures. The safety risks are less with LFP; but you&#8217;d still want one for longevity reasons, and also we do require one \/ take no responsibility for any safety issues with those either.&#8221;<\/p>\n<h3>Conclusion<\/h3>\n<p>In this project you can clearly see that Bernhard has taken such safety and system integration issues very seriously and his system went successfully live in early April.<\/p>\n<p>From that day on he was able to charge his Tesla and slowly switch the loads to the PV System, once he complied with local planning regulations to connect to the grid. For that he had to hire a professional electrical engineer, who checked the completed system and submitted permit applications to the power company for approval. Now that is completed he has all the required certificates to operate his system in a grid parallel situation.<\/p>\n<p>I think you&#8217;ll agree this has turned out a very professional build. Indeed Bernhard is delighted with it and has paid Victron some rather nice compliments too:<\/p>\n<ul>\n<li>Victron was the best choice I made.<\/li>\n<li>Wonderful and really good &#8216;deep diving&#8217; documentation.<\/li>\n<li>Robust hardware and good supply.<\/li>\n<li>It all works really well.<\/li>\n<\/ul>\n<p>Of course having such a neat system, many of his neighbours and others have now shown interest in a system like Bernhard&#8217;s. If you have too, why not check out the links below.<\/p>\n<p>My thanks to Bernhard Matschinger of Msol GmbH for the images and information used in this blog.<\/p>\n<p>If you are considering a similar system, don&#8217;t forget the <a href=\"https:\/\/community.victronenergy.com\" target=\"_blank\">Victron Energy Community<\/a> is a great place to meet fellow Victron users and Victron experts.<\/p>\n<p>John Rushworth<\/p>\n<h5>Links<\/h5>\n<p>Msol GmbH Website &#8211; <a href=\"https:\/\/www.msol.at\/\" target=\"_blank\">https:\/\/www.msol.at<\/a><\/p>\n<p>Msol GmbH on <a href=\"https:\/\/www.facebook.com\/Msol-GmbH-129442967101653\/\" target=\"_blank\">Facebook<\/a><\/p>\n<p><a href=\"https:\/\/www.msol.at\/\" target=\"_blank\"><div class=\"full-size-image container\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-17914 size-full\" src=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Msol_Logo_180_111973567.png\" alt=\"\" width=\"180\" height=\"180\" srcset=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Msol_Logo_180_111973567.png 180w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2019\/09\/Msol_Logo_180_111973567-150x150.png 150w\" sizes=\"auto, (max-width: 180px) 100vw, 180px\" \/><\/div><\/a><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>It&#8217;s great to hear from Victron Energy customers, be they end users, dealers or indeed budding dealers and installers. Here&#8217;s a case in point. Bernhard Matschinger got in touch with me lauding Victron&#8217;s products, which initially led him to build his own PV, Energy Storage UPS system and ultimately his own company &#8211; Msol GmbH. [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":17877,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[126,128],"tags":[148],"class_list":["post-17873","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical-articles","category-users-stories","tag-self-consumption-and-home-energy-storage"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Msol GmbH - A PV, Energy Storage &amp; UPS project - 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\/2019\/09\/19\/msol-gmbh-a-pv-energy-storage-ups-project\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Msol GmbH - A PV, Energy Storage &amp; UPS project - Victron Energy\" \/>\n<meta property=\"og:description\" content=\"It&#8217;s great to hear from Victron Energy customers, be they end users, dealers or indeed budding dealers and installers. 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Here\u2019s a case in point. Bernhard Matschinger got in touch with me lauding Victron\u2019s products, which initially led him to build his own PV, Energy Storage UPS system and ultimately his own company \u2013 Msol GmbH. [\u2026]","subtitle":"","related_posts":[{"id":33188,"slug":"automotive-diagnostics-expert-untangles-marine-power-problems","title":"Automotive diagnostics expert untangles Marine power problems","link":"https:\/\/www.victronenergy.com\/blog\/2026\/04\/24\/automotive-diagnostics-expert-untangles-marine-power-problems\/","excerpt":"Jake Archer's diagnostics experience gained in the automotive industry, working with luxury vehicles, has unexpectedly led to him being in demand on the water. Marine power installations can get complicated - combining AC and DC power distribution; battery charging from multiple sources: generators, alternator, solar; connections to shore power (of variable quality); together with the&hellip;","featured_image":"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2026\/04\/20251030_171144_320867562-150x150.jpeg","author_name":"justin","author_link":"https:\/\/www.victronenergy.com\/blog\/author\/justin\/","author_avatar":{"24":"https:\/\/secure.gravatar.com\/avatar\/dc1aee15dc88b16fe8302452197d07d203697be68b3ea32d831473d70ae3026b?s=96&d=mm&r=g&s=24","48":"https:\/\/secure.gravatar.com\/avatar\/dc1aee15dc88b16fe8302452197d07d203697be68b3ea32d831473d70ae3026b?s=96&d=mm&r=g&s=48","96":"https:\/\/secure.gravatar.com\/avatar\/dc1aee15dc88b16fe8302452197d07d203697be68b3ea32d831473d70ae3026b?s=96&d=mm&r=g&s=96"},"categories":[{"name":"Users stories","link":"https:\/\/www.victronenergy.com\/blog\/category\/users-stories\/"}],"date":"2026-04-24T11:54:51+02:00","date_gmt":"2026-04-24T09:54:51+00:00"},{"id":33232,"slug":"iman-verte","title":"Iman Verte","link":"https:\/\/www.victronenergy.com\/blog\/2026\/04\/17\/iman-verte\/","excerpt":"Lyc\u00e9e Iman is a school in Nouakchott, Mauritania, with over 500 pupils from nursery age to seniors. The school\u2019s management decided to invest in a multi-faceted educational sustainability initiative which would help its pupils to learn about solar energy, water sustainability and waste management. The most ambitious part of the programme was for the entire&hellip;","featured_image":"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2026\/04\/Screenshot-2026-04-10-at-10.36.36_319661093-150x150.png","author_name":"justin","author_link":"https:\/\/www.victronenergy.com\/blog\/author\/justin\/","author_avatar":{"24":"https:\/\/secure.gravatar.com\/avatar\/dc1aee15dc88b16fe8302452197d07d203697be68b3ea32d831473d70ae3026b?s=96&d=mm&r=g&s=24","48":"https:\/\/secure.gravatar.com\/avatar\/dc1aee15dc88b16fe8302452197d07d203697be68b3ea32d831473d70ae3026b?s=96&d=mm&r=g&s=48","96":"https:\/\/secure.gravatar.com\/avatar\/dc1aee15dc88b16fe8302452197d07d203697be68b3ea32d831473d70ae3026b?s=96&d=mm&r=g&s=96"},"categories":[{"name":"Users stories","link":"https:\/\/www.victronenergy.com\/blog\/category\/users-stories\/"}],"date":"2026-04-17T09:41:59+02:00","date_gmt":"2026-04-17T07:41:59+00:00"},{"id":33069,"slug":"four-season-rv-with-solar-power","title":"Four Season RV with Solar Power","link":"https:\/\/www.victronenergy.com\/blog\/2026\/03\/27\/four-season-rv-with-solar-power\/","excerpt":"\"I ordered my AEV Prospector and Four Wheel Camper in December 2020, took delivery in September 2021, and began full-time overland travel in October 2022. My journey has taken me through virtually all of the 48 contiguous United States. I particularly enjoy traveling Backcountry Discovery Routes (ranging from 150 to 1,500 miles), exploring vast National&hellip;","featured_image":"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2026\/03\/PXL_20250923_1920535302_318475743-150x150.jpg","author_name":"justin","author_link":"https:\/\/www.victronenergy.com\/blog\/author\/justin\/","author_avatar":{"24":"https:\/\/secure.gravatar.com\/avatar\/dc1aee15dc88b16fe8302452197d07d203697be68b3ea32d831473d70ae3026b?s=96&d=mm&r=g&s=24","48":"https:\/\/secure.gravatar.com\/avatar\/dc1aee15dc88b16fe8302452197d07d203697be68b3ea32d831473d70ae3026b?s=96&d=mm&r=g&s=48","96":"https:\/\/secure.gravatar.com\/avatar\/dc1aee15dc88b16fe8302452197d07d203697be68b3ea32d831473d70ae3026b?s=96&d=mm&r=g&s=96"},"categories":[{"name":"Users stories","link":"https:\/\/www.victronenergy.com\/blog\/category\/users-stories\/"}],"date":"2026-03-27T17:16:43+02:00","date_gmt":"2026-03-27T15:16:43+00:00"}],"_links":{"self":[{"href":"https:\/\/www.victronenergy.com\/blog\/wp-json\/wp\/v2\/posts\/17873","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.victronenergy.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.victronenergy.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.victronenergy.com\/blog\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.victronenergy.com\/blog\/wp-json\/wp\/v2\/comments?post=17873"}],"version-history":[{"count":66,"href":"https:\/\/www.victronenergy.com\/blog\/wp-json\/wp\/v2\/posts\/17873\/revisions"}],"predecessor-version":[{"id":30032,"href":"https:\/\/www.victronenergy.com\/blog\/wp-json\/wp\/v2\/posts\/17873\/revisions\/30032"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.victronenergy.com\/blog\/wp-json\/wp\/v2\/media\/17877"}],"wp:attachment":[{"href":"https:\/\/www.victronenergy.com\/blog\/wp-json\/wp\/v2\/media?parent=17873"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.victronenergy.com\/blog\/wp-json\/wp\/v2\/categories?post=17873"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.victronenergy.com\/blog\/wp-json\/wp\/v2\/tags?post=17873"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}