Looks like a good deal but I would hope that you receive a consultation to review your energy needs before having to decide on this.
I'm keen to understand if you went for this option? How many panels are actually included for the size of the house you're building and did you end up paying for extra panels?
I'm pretty sure we had to go with Sonen for solar panels. You get ?1.5kW of panels but we calculated that for our household we needed much more so got a variation raised for more. Decided against battery for now as it doesn't make financial sense right now but will get one aftermarket. We did not like what was offered battery wise from Sonen, nor the plan.
30 panels eek!