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Warren Porteous

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  1. Thank you Achmat, this evening I noticed the battery draining rapidly and your description explains this. with the limit to load unchecked and with no solar it was using battery for non critical loads. Now with it checked I presume battery depletion will reduce. looking forward to tomorrow to see if the grid feedback problem remains resolved.
  2. Thanks Achmat, gladly problem solved.. the (rather confusing) options on the "System Mode" panel were the key. Although the "Zero Export" button was checked there are two conditions under which this is overridden underneath the check box, "Sol exp bat full" and "Limit to load only". Both of these were checked and therefore allowed power to flow to the grid. "Sol exp bat full" means it will allow solar to be exported when the battery is full (even though "zero export" is checked).. so its a conditional function. "limit to load only" means solar will be available for solar loads only (i.e. critical loads) anything else, is pushed back to grid. I have unchecked both and the push back has stopped. The flow from grid is now the min 20w and the panels are throttling back. Re the meter, I have a digital meter but its not prepaid, rather debit order. In my house I have a CIU (customer interface unit). The CIU is used by prepaid customers to load credits. I think the meter was charging me for the solar being pushed back to grid as the reading was increasing. Thanks
  3. Hi - Hope the forum can offer guidance. I had a Sunsynk 5.5 installed during the week. There is a problem in surplus power feeding to the grid. During high PV production the flow back to the grid reaches 3.5kw (and over). As I am not sure where the "grid" reading takes places (at the inverter or at the board) I switched off all non critical loads at the board to check whether flow reduced. Unfortunately the negative flow continued. So, the power from PV banks does not reduce in cases where AC1, AC2 and non critical loads are less than production and the balance flows to the grid. Also my Eskom P160 Customer Interface Unit has also stopped reading. A few questions to help me understand where the problem might be - which sensor provides the "grid" reading on the sunsynk? is this read at the CT or at the grid input on the inverter? - are there settings, in the management system, to prevent feedback to the grid? - alternately, are there settings that enable the reduction of PV generation when the CT detects a negative flow? (i.e. power being returned to the grid) If there have been similar experiences in overcoming power returning to the grid, I'd greatly appreciate your guidance on problem areas to investigate. Lastly, what is Eskom's stance on this. I know returning power to the grid is not allowed. Is there some tolerance allowed in setting up a new inverter and working through snag lists. Or should I shut down the whole system until the installer is able to solve the problem? Thanks
  4. thanks, but please forgive me I'm a beginner and missing something.. how does that work, if there is only one AC connection for loads?
  5. Hi - does this inverter have the ability to supply power, that is not being used by the critical loads, to non - critical loads. I ask because on a victron there are 2 AC connections for the load. The first connection supplies critical circuits and the second the non critical. In the event of a grid outage only critical loads receive power. The Sunsynk only seems to have one AC connection for loads. Clearly this will be connected to the critical loads. Can excess power be supplied to non critical loads? Thanks
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