Most people will want the BPS with option 1 but that could be $60k+. That’s a huge investment even if it is best in class.
It will not be $60K+ for just the BPS.
Although it's build cost is higher then that of an Extreme, and the accumulated R&D costs are very significant, it will not require intensive support, in fact it will lower support load due to not having to support problems caused by fuse swapping and answering questions related to the AC power utility. Hence the earlier estimate on "page unknown" in this thread that an Extreme + BPS would retail at about double the Extreme's retail.
Do note that the build cost highly depends on the chassis and battery cell quality. The battery cells we have selected do not require a change after 5-7 years, in fact they are guaranteed to function at 95% of new after 30 years or 100.000 charge cycles (which would be 273 years at once a day charging). They also sound significantly better then any other cell we tried. You cannot buy these as a private individual btw, the MOQ is 2000pcs and you need to submit your plan of usage, including very stringent safety measures etc, to the manufacturer for approval. We actually had to resort to enlisting an engineer specialised in EVs drive systems to get this done, and it took him over a year...
Then we had to design the BMS to be able to match the battery cell life expectancy, that means for example no electrolytic capacitors in the final model, that is in fact quite a challenge on it's own and raises not only costs but also design effort significantly,
And last but not least a Bluetooth controller / interface with an IOS APP to manage the BPS, the obvious hard part of this being it needing to be extremely low noise / inaudible while being mounted inside the chassis!
So was this all worth it?
We've been getting questions if we could build a bigger and better Extreme almost from day 1 of launch, now over 4 years ago. And we have build bigger and better Extremes, lots of them. 2,3,4,5 box versions, weights ranging from ~180 to a whopping ~900 lbs. And they all do sound better. The bigger the more significantly so, retail price tags ranging from ~50K to ~150K and we could even go beyond that. And it's every much as sensitive to fuses, power cords, powergrid "quality" etc as it is now, in fact increased sensitivity... To be blunt, in my mind this is not a very clever approach, there is zero innovation in this, a rather wasteful use of this worlds natural resources if I may say so.
So again, was it all worth it, well IMHO a big yes, as this BPS option not only significantly outperforms even our biggest most badass linear powered build, it is also more durable and uses less resources, both in build as in after sales support, and you as a customer are paying roughly the same, or maybe a few % more then you would for a 2 box linear powered extreme.