Thinking through the areas that Tesla has a strong advantage in terms of experience and engineering talent, I remember that EM stated at one point a few years ago that Tesla makes the world's best inverters. Witnessing the drive-train efficiency advantage that Tesla has in practice seems to indicate that they may indeed make a very efficient inverter.
Current practice for Tesla Solar seems to be that they are using readily available commercial solar PV inverters. For now, it seems to have made sense to continue that trend. In the spirit of vertical integration, and as the solar sales and Solar Roof installations scale, it may make sense to:
1. Integrate a solar inverter into the Powerwall
2. Design and produce a solar PV inverter for Solar Roof
3. Design and produce integrated panel/microinverter PV modules
or some combination of the above.
I've not heard much discussion on this and only see some fairly old articles exploring the possibilities. What does the hivemind here think?
Yes, Tesla energy is a personal hobby horse of mine, I can see lots of potential to do more, simply because all problems with 100% RE are not yet solved.
My original interest in Tesla stemmed from an interest in RE, I'm probably one of the few that started researching the Powerwall before all other products....
Specifically in relation to the Australia gird there are some problems where Tesla can made a contribution and make some money..
So problems are an opportunity, not that Tesla will necessarily be interested in all of them, but they may be interested in some.
1. Solar Farm Inverters - some new solar farms are having problem with inverters, I don't know the exact issue. Due to grid issues I am expect solar farm projects to go down in scale and add a battery, fitting the projects to the current shape of the grid.
The opportunity is for Tesla to provide a package solution - inverter + battery + software...
2. Network costs - these are 42% of the electricity price in Australia at present, some of that is over investment in substations about the time households started deploying solar and energy efficient lighting due to high prices... Worse still the grid is the wrong shape, it runs along the east coast mainly out of ageing coal plants, many of the good RE resources particularly solar are inland and many solar farm projects are held up awaiting grid updates (in addition to their inverter problems and issues due to the lack of a battery). So what is really needed here is a total "first principles" rethink on how we construct and maintain electrcity grids... that might be something Tesla can contribute to by developing products and solutions ... not getting heavily involved in construction.. And if part of the solution is a fragmentation into connected micro-grids.... Tesla can get involved at the micro-grid level..
3. Seasonal Variation - batteries solve daily variation over 24 hours very well, but for the summer / winter cycle longer term storage is needed. There are alternatives, pumped hydro, hydrogen, liquefied compressed air, synthetic fuels, etc... If Tesla could develop some sort of product that efficiently stored energy on a long term basis, solar farms are a ready market...
There are more problems than this, and hence more opportunities, so 100% RE is far from a totally solved problem with no challenges.
Issues are surfacing in Australia first because in many ways we are further down the track, but these problems will eventually surface in many places worldwide, so any products developed have a global market.