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question on power usage following a new PV installation
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<blockquote data-quote="johnb2713" data-source="post: 530633" data-attributes="member: 35153"><p>I think the inverter is of greater importance with your issue. I'm fairly new to solar but I cant see and reason to undersize the inverter by such and amount. If you have a kettle on for example, that will be taking 2 to 3kW, you only need the fridge or freezer to start up then there would be a momentary import of power for the startup. 3.65 kW isnt a great deal of power and you will have very little headroom with this.</p><p></p><p></p><p>I'm only aware of the Growatt inverters behaving in the manner suggested.</p><p>All of the grid tied inverters work by way of measuring the voltage and import / export. If it see's youre importing it will increase it's output voltage until the import is zero or there's a small amount of export being measured, I often see minimal exports but usually 15w to 150w being on all of the time. </p><p></p><p></p><p>The APP would certainly give you some idea of what/where/when etc.</p><p></p><p>Heres a graph of today so far. You can see the regular low level of import pulse with do go all day. These little pulses can easily add up to a 1 to 2kWh import.[ATTACH=full]13917[/ATTACH]</p><p></p><p>One other thought, they do have a CT wrapped around the meter tails with nothing omitted?</p></blockquote><p></p>
[QUOTE="johnb2713, post: 530633, member: 35153"] I think the inverter is of greater importance with your issue. I'm fairly new to solar but I cant see and reason to undersize the inverter by such and amount. If you have a kettle on for example, that will be taking 2 to 3kW, you only need the fridge or freezer to start up then there would be a momentary import of power for the startup. 3.65 kW isnt a great deal of power and you will have very little headroom with this. I'm only aware of the Growatt inverters behaving in the manner suggested. All of the grid tied inverters work by way of measuring the voltage and import / export. If it see's youre importing it will increase it's output voltage until the import is zero or there's a small amount of export being measured, I often see minimal exports but usually 15w to 150w being on all of the time. The APP would certainly give you some idea of what/where/when etc. Heres a graph of today so far. You can see the regular low level of import pulse with do go all day. These little pulses can easily add up to a 1 to 2kWh import.[ATTACH=full]13917[/ATTACH] One other thought, they do have a CT wrapped around the meter tails with nothing omitted? [/QUOTE]
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question on power usage following a new PV installation
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