Hi. I have a 2kw grid-tie inverter (GTI). My GTI can zero out any import from grid for all my loads except my aircon. Without the aircon switch on, my GTI can support (does not import from grid) all my loads up to a maximum of 1.4kw.
However, if i switch off all my loads and just switch on my aircon (inverter type 1hp split-type panasonic aircon), which just draws from 400w to 600w, the GTI only produces about 250w and maintains an import of about 150w to 250w despite the availability of excess pv power. I can say that I have excess pv power because if i add another load, the GTI's output will jump from 250w to 1kw immediately.
This behavior of the GTI is somewhat limited to the aircons only. I have also tested the GTI with a second aircon in the house (another brand, LG inverter split-type 1hp), but this time, the GTI only maintains power import of 40w to 60w, which is lower than the panasonic aircon.
Again, for all other loads (refrigerator, water heater, electric fans, electric kettles, television, computer, freezer), the GTI can maintain zero or minimal import. But when I switch on the aircon, grid import is mantained at 150w to 250w.
Is it my GTI that is the problem here? Or are the aircons the cause of the GTI having difficulty in zeroing out grid import despite availability of excess pv power? If it is the aircons that is the cause, what do you think is the underlying cause of this problem? Power factor of the aircon? Are the aircons grounded? Any other cause?
Thank you so much for any input on this problem that has been puzzling me ever since.
However, if i switch off all my loads and just switch on my aircon (inverter type 1hp split-type panasonic aircon), which just draws from 400w to 600w, the GTI only produces about 250w and maintains an import of about 150w to 250w despite the availability of excess pv power. I can say that I have excess pv power because if i add another load, the GTI's output will jump from 250w to 1kw immediately.
This behavior of the GTI is somewhat limited to the aircons only. I have also tested the GTI with a second aircon in the house (another brand, LG inverter split-type 1hp), but this time, the GTI only maintains power import of 40w to 60w, which is lower than the panasonic aircon.
Again, for all other loads (refrigerator, water heater, electric fans, electric kettles, television, computer, freezer), the GTI can maintain zero or minimal import. But when I switch on the aircon, grid import is mantained at 150w to 250w.
Is it my GTI that is the problem here? Or are the aircons the cause of the GTI having difficulty in zeroing out grid import despite availability of excess pv power? If it is the aircons that is the cause, what do you think is the underlying cause of this problem? Power factor of the aircon? Are the aircons grounded? Any other cause?
Thank you so much for any input on this problem that has been puzzling me ever since.
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