izzu91
Junior Member level 1
i wonder that the grid tied solar inverter has transformer in it?i see an inverter at shop, the input is 12vdc and output is 240vac, how it jump up from 12vdc to 240vac?
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A lot of grid tied inverters (1kW - 5kW) are " transformerless" these days and the whole solar panel string is effectively connected to the mains via the inverter - hence the panels and their wiring must be done by licensed electricians, and the panel insulation also up to standard, as large installations of panels run from 100V - 550V no load, there is not a lot of difference between mains and these high DC voltages, the transformerless inverters (boost + H bridge inverter) are more efficient and lighter than a unit with a 50/60Hz or even a switchmode transformer...
I think Orson was talking of grid tied inverters, just as a point of difference, and not the smaller 12 or 24V input ones...
Yes, it's using high frequency transformers.microchip and many more have done this topology