10kWh is enough to run one 110VAC outlet at full capacity for about 10 hours. I don’t know where that 10kWh figure comes from but most American houses use between 15-30kWh per day.
So that 10 foot cube would need to be closer to 15ft cubed. It’s huge. Perhaps the foundation of the structure would work, as someone else mentioned.
Amazon entirely dominated by white label products from Alibaba, though. Where are you going to find a WXTMO Potato Peeler for cheaper and with better service?
I just skip amazon entirely. The search really isn’t useful anymore.