Originally Posted by nimblemotors
Is the cooktop actually set up to draw power from the inverter?
That would be the next thing to check.
It seems some inverters don't output power unless a draw is detected, and perhaps the cooktop doesn't work until iT sees power coming in, so there is a stalemate between the two.
I don't think sine-wave or not is an issue, the cooktop just converts it to DC. Sine wave is mostly an issue for motors that need the slower ramping up/down of the AC voltage.
I don't believe that's how it works. The cooktop induces current
in the pan through building and collapsing magnetic fields - AC power.
The problem with MSW inverters, especially the cheap
ones, is that their sine waves are so modified they don't look anything like a sine wave. They provide an almost square wave output, and this output is lacking the same power output as a sine wave. When you measure the current
, it doesn't produce the same amperage due to the missing sections under the curve. The MSW waveform is an approximation of a sine wave, but it's missing all of the power under the curve.
Other devices - desktop
PCs, laptops, cell phone
chargers, LCD TVs, etc all have built in power supplies that filter out noise- and in the process fill in the missing portions of the MSW. However, induction cooktops and microwave ovens require all of their rated power, and they use it, an MSW does not provide the needed power under the curve.
I have installed a lot of inverters (mostly Xantrex) and none of them would allow a microwave to operate properly, even though they were rated to provide the necessary power.
There are a lot of cheap
pure sine wave inverters on the market now, I'd try and find one of those that works.