PJJ Posted December 17, 2018 Share Posted December 17, 2018 (edited) Hello guys We are considering getting one of the Huawei SUN2000 36KTL inverters for the farm, and we can always add more later if we want more PV, but my question here is, what is the max output power (Grid + AC from PV) that the inverter can pass? Because we only want to install 30KW worth of panels for now, but our total power draw on a nice warm day goes over 150Kva, the only indication I get is a "Max Output current" rating that is stated as 60.8A, meaning (60.8 x 3) * 380V = 70Kva? Thanks in advance! Edited December 17, 2018 by PJJ Quote Link to comment Share on other sites More sharing options...
Chris Hobson Posted December 17, 2018 Share Posted December 17, 2018 Huaweis don't pass current they augment current to the max of their ability. So if the inverter is producing 25kW and the load is 75kW then 50kW comes from Eskom. The 50kW does not pass through the inverter. The inverter's output is added to eskom rather than the otherway around. Quote Link to comment Share on other sites More sharing options...
PJJ Posted December 17, 2018 Author Share Posted December 17, 2018 12 minutes ago, Chris Hobson said: Huaweis don't pass current they augment current to the max of their ability. So if the inverter is producing 25kW and the load is 75kW then 50kW comes from Eskom. The 50kW does not pass through the inverter. The inverter's output is added to eskom rather than the otherway around. Thanks Chris! But how does the Huawei know how much current is required? Quote Link to comment Share on other sites More sharing options...
PJJ Posted December 17, 2018 Author Share Posted December 17, 2018 Ok so to illustrate behold my magnificent paint skills So now the inverter sits in parallel to the grid? Quote Link to comment Share on other sites More sharing options...
Gabriel_2018 Posted December 17, 2018 Share Posted December 17, 2018 (edited) 2 hours ago, PJJ said: Hello guys We are considering getting one of the Huawei SUN2000 36KTL inverters for the farm, and we can always add more later if we want more PV, but my question here is, what is the max output power (Grid + AC from PV) that the inverter can pass? Because we only want to install 30KW worth of panels for now, but our total power draw on a nice warm day goes over 150Kva, the only indication I get is a "Max Output current" rating that is stated as 60.8A, meaning (60.8 x 3) * 380V = 70Kva? Thanks in advance! No, In a triphase System, Aparent Power=1.71*380*60.8= 39.507 VA Edited December 17, 2018 by Javi Martínez Quote Link to comment Share on other sites More sharing options...
Gabriel_2018 Posted December 17, 2018 Share Posted December 17, 2018 31 minutes ago, PJJ said: Ok so to illustrate behold my magnificent paint skills So now the inverter sits in parallel to the grid? Yes, Inverter works in parallel and need grid to work. Quote Link to comment Share on other sites More sharing options...
Gabriel_2018 Posted December 17, 2018 Share Posted December 17, 2018 49 minutes ago, PJJ said: Thanks Chris! But how does the Huawei know how much current is required? If you install the hawaie without control, Huawei will inject all energy solar pannels are able to produce. Quote Link to comment Share on other sites More sharing options...
Chris Hobson Posted December 19, 2018 Share Posted December 19, 2018 Hi You install a Huawei Smartlogger and enable its grid limiter function. It then gets the mix of solar and Eskom right so that you do not feed into the grid. Yesterday visited a Huawei install I did in April and tweaked some of the settings. Quote Link to comment Share on other sites More sharing options...
PJJ Posted December 19, 2018 Author Share Posted December 19, 2018 1 hour ago, Chris Hobson said: Hi You install a Huawei Smartlogger and enable its grid limiter function. It then gets the mix of solar and Eskom right so that you do not feed into the grid. Yesterday visited a Huawei install I did in April and tweaked some of the settings. Thanks for the info Chris! I also assume I could then later add more Huawei units in parallel and all of them connect to one smartlogger? Quote Link to comment Share on other sites More sharing options...
Chris Hobson Posted December 19, 2018 Share Posted December 19, 2018 You can connect multiple inverters to Solar Log the German logger I am not sure of the Huawei product - It was only released in SA after I did the install. Quote Link to comment Share on other sites More sharing options...
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