July 20, 20232 yr So currently I have a Goodwe ES 4.6kW. I found out early on that we could overload this system. Usually at breakfast time. Toaster + microwave + kettle would often do it. Looking at the datasheet and if I understand it correctly, it supports peak loads of 9.2 kW whilst the grid is available, but only 6.9kW when there is no grid. This explains the occasional overload we still get. But OK… what about the alternatives? If I look at the 5kW sunsynk it says peak “off-grid” is 10kW. IE (if I understand correctly) it can deliver 10kW in short bursts with no grid. It doesn’t give 2 figures like Goodwe do. So do I understand correctly? Goodwe will allow only 6.9kW when the grid is down? Sunsynk will allow 10kW when the grid is down? If so, that’s a significant advantage to the Sunsynk. I’d have a lot more headroom. It can also charge faster (125A v 100).
July 20, 20232 yr 2 hours ago, Bobster. said: So currently I have a Goodwe ES 4.6kW. I found out early on that we could overload this system. Usually at breakfast time. Toaster + microwave + kettle would often do it. Looking at the datasheet and if I understand it correctly, it supports peak loads of 9.2 kW whilst the grid is available, but only 6.9kW when there is no grid. This explains the occasional overload we still get. But OK… what about the alternatives? If I look at the 5kW sunsynk it says peak “off-grid” is 10kW. IE (if I understand correctly) it can deliver 10kW in short bursts with no grid. It doesn’t give 2 figures like Goodwe do. So do I understand correctly? Goodwe will allow only 6.9kW when the grid is down? Sunsynk will allow 10kW when the grid is down? If so, that’s a significant advantage to the Sunsynk. I’d have a lot more headroom. It can also charge faster (125A v 100). That 10kw on SS is for like 2seconds so not really worth writing about tbh
July 20, 20232 yr 29 minutes ago, mzezman said: That 10kw on SS is for like 2seconds so not really worth writing about tbh @mzezmanare correct that is mainly for inductive surges ( fridge freezer compressors) that last only a few milliseconds.
July 20, 20232 yr Author 2 hours ago, mzezman said: That 10kw on SS is for like 2seconds so not really worth writing about tbh I get that the peak values are not continuous. Goodwe quote 10seconds for their peak. I was recently horrified when the peak (according to SEMS) in this house hit 6K. I didn't think it was possible, but it is. And because the system tripped, all I can be sure of is that it went on for more than 10 seconds. It may have persisted for .... at least as long as it takes for a kettle to boil (turning on the kettle seems to be what pushed it over the edge). So a 5kW SunSynk would probably have tripped.
July 20, 20232 yr 3 hours ago, mzezman said: That 10kw on SS is for like 2seconds so not really worth writing about tbh It looks like it’s also 10s on the Sunsynk, for a peak of 10kW: https://www.solarwaysuppliers.co.za/wp-content/uploads/2021/08/sunsynk-5kw-data-sheet.pdf I wonder how long it would run at a lower value (like 6kW)…
July 20, 20232 yr Have you looked at the Kodak 6.2Kw? Think is called the King II. I'll be able to run all your element based appliances at the same time and as long as your battery pack handle the output while on LS too. I installed one for my aunt (with the appropriate battery) and they are very happy.
July 20, 20232 yr Author 2 hours ago, JayMardern said: It looks like it’s also 10s on the Sunsynk, for a peak of 10kW: https://www.solarwaysuppliers.co.za/wp-content/uploads/2021/08/sunsynk-5kw-data-sheet.pdf I wonder how long it would run at a lower value (like 6kW)… My Goodwe gives a continuous 4.6kW, then will allow bursts up to 6.9 for 10 second. OK... it might go longer at 5.3 (for EG) but they're not going to promise you that. I read that as over 6.9 it trips immediately, over 4.6 and up to 6.9 you can expect 10 seconds.
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.