Badri Kothandaraman
Analyst
Yes. I mean our thought process when we talked about IQ8D before was, okay, we can generate, we can get a 640 watt microinverter that addresses two panels. That means per panel the microinverter will produce 320 watt AC. And yes, we have been a little bit delayed on that product. And what – when we did pilot testing a few months ago, our installers basically once again gave us feedback that the module roadmap for small commercial is well beyond 500 watts right now. And if it is 500, you take 500 divided by 320. That’s the DC, AC ratio of 1.5. 1.5 is not ideal. We want to stay under 1.3. So for us, we thought about it hard. We said in our installer feedback is critical. We need to change. We need to get a product with much higher AC power. Earlier, we were not that much advanced on GaN. Now, what we can do is to pack that 480 watt AC power into the same footprint for IQ9. So in IQ9, we plan to have that 480 watt of AC in the same footprint as IQ8D. And how is that possible? It is possible because of innovative technology like GaN. So GaN stands for gallium nitride, gallium nitride output transistors right now we use silicon transistors 600 volts silicon transistors. These GaN transistors can basically, they have the thermal characteristics can withstand high power. And so those will enable us to keep the footprint quite competitive in state-of-the-art. And then the additional benefits are the GaN allows us to operate the feds at a higher frequency. Today, we operate at a 100 kilohertz. GaN allows it to operate a lot more up to 1 megahertz. We are planning to utilize 1 megahertz for IQ 10, but on IQ9, we will probably be around 200 to 300 kilohertz. And then what happens is the transformer scales basically to these – to one over the square root of the increase. So that means that the transformer can come down, the size of the transformer can come down. The transformer is big, you’ve seen the round thing there in the top left of the microinverter, that’s the transformer. So that footprint can come down, the volume can come down, the FX can still be the same. And soon there will be an opportunity, although we are not planning to do in the DC stage yet, implement again in the DC stage, there is opportunity for us to implement again in the DC stage as well. So lots of optimization possible. Name of the game is to keep the footprint the same, not bloated. Size is important for us and I think we can get the cost structure as well under control. And if we are able to pack in 480 watts AC punch into similar number of components, similar cost structure, then we directly get the cost benefit there in terms of cost per watt.