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<blockquote data-quote="binky" data-source="post: 507188" data-attributes="member: 490"><p>It's a perfectly reasonable question. I used to wonder if you have a street of houses all with PV, how does the inverter know if the mains grid is 240V if an inverter in another house is exporting to the grid at 245V? I do know from WPD friend that they do get problems with grid voltages rising on estates wth lots of PV in summer months, but I'm kind of guessing the surplus voltages get absorbed by other houses with, say the washing machine working, and I assume modern mains distribution transformers probably monitor the voltages and adjust themselves down accordingly. The DNOs don't like inverters exporting more than 16A back to the grid, (you can ask for a higher export which may be granted in certain places) and like to limit backfeed to the local transformer to a max of 30% if I remember correctly. On that basis, you still have 70% of the grid to sync with. It's a question I've never got an answer to. </p></blockquote><p></p>
[QUOTE="binky, post: 507188, member: 490"] It's a perfectly reasonable question. I used to wonder if you have a street of houses all with PV, how does the inverter know if the mains grid is 240V if an inverter in another house is exporting to the grid at 245V? I do know from WPD friend that they do get problems with grid voltages rising on estates wth lots of PV in summer months, but I'm kind of guessing the surplus voltages get absorbed by other houses with, say the washing machine working, and I assume modern mains distribution transformers probably monitor the voltages and adjust themselves down accordingly. The DNOs don't like inverters exporting more than 16A back to the grid, (you can ask for a higher export which may be granted in certain places) and like to limit backfeed to the local transformer to a max of 30% if I remember correctly. On that basis, you still have 70% of the grid to sync with. It's a question I've never got an answer to. [/QUOTE]
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