Does it seem unusual that it's costing $100mm for 2300 classrooms, which is about $43k each?
https://www.tesla.com/powerwall
"Your final design and pricing will be based on your electrical panel, home energy usage, number of Powerwalls, and where you’d like your Powerwall installed. Typical installation cost ranges from $800 to $2,000. This does not include solar installation, electrical upgrades (if necessary), taxes, permit fees, or any retailer / connection charges that may apply."
I assume shipping would add a HEAFTY cost in Hawaii as well.