Dani Posted November 4, 2020 Share Posted November 4, 2020 (edited) So I've got an important dilemma. Currently using a 3 phase borehole pump but loving the rabbit hole that is solar power. Currently using an axpert. But moving to sunsynk. So the question is do I try source another 2x axpert and retain the 3 phase pump or buy a single phase pump and get the 8kw sunsynk (or perhaps try get away with the 5kw)? Edited November 4, 2020 by Dani Grammar Quote Link to comment Share on other sites More sharing options...
Delta9 Posted November 6, 2020 Share Posted November 6, 2020 The question is, why do you have a 3 phase pump in the first place? Is the motor size such that you only have a 3 phase option? What size is the 3 phase motor of the pump? You have to allow for inrush current to start the pump. So how many amps does the pump draw in normal running mode? Once you know that, you can then approximate the start up current draw to then work out how much inverter you need to start that load. A soft starter is your friend. Quote Link to comment Share on other sites More sharing options...
Dani Posted November 6, 2020 Author Share Posted November 6, 2020 Thx @Delta9 I will investigate the specs of the pump and then post some more details Quote Link to comment Share on other sites More sharing options...
Delta9 Posted November 9, 2020 Share Posted November 9, 2020 This explains a bit about what inrush current is https://www.facebook.com/2082031392023647/videos/2341453072570941 Quote Link to comment Share on other sites More sharing options...
HeinDuPlessis Posted November 9, 2020 Share Posted November 9, 2020 (edited) I have the same requirement. I have been told that a 3 phase pump is much more energy efficient than a single phase. I don't understand why though. Apparently one gets a device that converts single phase to 3 phase? I can only imagine that involves energy loss. Also, replacing the pump with a single phase will cost close to R70 000 so I'm also caught in the dilemma! Edited November 9, 2020 by HeinDuPlessis Quote Link to comment Share on other sites More sharing options...
Thunderdolt Posted November 10, 2020 Share Posted November 10, 2020 Would one of the Aspire pump controllers not be a solution? http://voltronicpower.com/en-US/Product/Detail/Aspire-Solar-Pump-Inverter#tab_menu1. I have seen them as advertised Mecer brand in South Africa. https://mustek.co.za/mecer-aspire/ Quote Link to comment Share on other sites More sharing options...
Dani Posted November 10, 2020 Author Share Posted November 10, 2020 Thx guys. I'll look into the mecer. Still need to get pics of the pump for more details... It's not at me it's at a family member. Quote Link to comment Share on other sites More sharing options...
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