July 1, 20205 yr PIP5048GK now support mixing of power to load, that is, if solar is insufficient, it will augment it with power from the grid. But my question is: how does it do it? Because unlike the the MK, it is not double conversion. If the voltage or frequency of the utility supply is fluctuating say between 210V to 230V or 49Hz to 51Hz, will it still be able to mix with solar? Will the waveform still be sinusoidal? Cc coulomb weber
July 1, 20205 yr 1 hour ago, Mank1234 said: PIP5048GK now support mixing of power to load, that is, if solar is insufficient, it will augment it with power from the grid. I looked at the spec sheet, and it doesn't really leap off the page to me. Where did you hear this or read this? (I'm curious, I don't normally care too much about this brand 🙂 ). What I can deduce from the spec sheets is that it has a high voltage PV-input, so the PV is likely buck/boosted directly onto the high voltage DC bus. Maybe it does the same thing as the "King" model then? That is technically a kind of double conversion, in that the AC is turned into DC and back into AC, although it is not taken down to battery voltage and back up (which makes it a tad more efficient). Interesting that it can also run battery-less. I would assume it works like the SMA models that have the emergency power feature: It uses the PV directly to make AC, but limits you to a fraction of the normal maximum power.
July 1, 20205 yr Author 27 minutes ago, plonkster said: I looked at the spec sheet, and it doesn't really leap off the page to me. Where did you hear this or read this? (I'm curious, I don't normally care too much about this brand 🙂 ). What I can deduce from the spec sheets is that it has a high voltage PV-input, so the PV is likely buck/boosted directly onto the high voltage DC bus. Maybe it does the same thing as the "King" model then? That is technically a kind of double conversion, in that the AC is turned into DC and back into AC, although it is not taken down to battery voltage and back up (which makes it a tad more efficient). Interesting that it can also run battery-less. I would assume it works like the SMA models that have the emergency power feature: It uses the PV directly to make AC, but limits you to a fraction of the normal maximum power. https://www.mppsolar.com/v3/pip-gk-series/ It's on that page.
July 1, 20205 yr 4 minutes ago, Mank1234 said: https://www.mppsolar.com/v3/pip-gk-series/ It's on that page. Aaah ok, I see it, but note this warning text (they try to disable copying but my former web-developer backside has some skillz): Quote To avoid any misunderstanding, please note MAX output power from the inverter from any source(s) of power, singly or jointly, remains unchanged and is still the same as the designed rating. So it sounds like they do the same half-double-conversion as the King.
July 1, 20205 yr 1 hour ago, Mank1234 said: PIP5048GK now support mixing of power to load, that is, if solar is insufficient, it will augment it with power from the grid. But my question is: how does it do it? I believe that the inverter pushes power into the AC-in connection (usually the grid for this blending), just like a grid interactive inverter would. AC-in would be relay-connected to AC-out. We discussed this here. 1 hour ago, Mank1234 said: If the the voltage or frequency of the utility supply is fluctuating say between 210V to 230V or 49Hz to 51Hz, will it still be able to mix with solar? Will the waveform still be sinusoidal? Yes. The Axpert/PIP will have synchronised to AC-in already, usually only for smooth changeover from AC-in to inverter, or for utility charging. So it continues to keep in sync, allowing it to push or pull power from the grid by adjusting its amplitude and frequency.
July 1, 20205 yr 16 minutes ago, plonkster said: my former web-developer backside has some skillz): Your backside has skillz? 🙂 16 minutes ago, plonkster said: So it sounds like they do the same half-double-conversion as the King I'm thinking that they just declare overload at rated power, so that in case the grid suddenly drops off, the inverter doesn't find itself carrying more than it can handle on its own. Rated power may include the several seconds of double continuous power rating, which would be handy for starting large surge loads like motors. [ Edit: as discussed recently in another topic.] Edited July 1, 20205 yr by Coulomb
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