That's a need that can also be met with a towable trailer that locks up tools, carries batteries, and supports panels for charging, eg:

* https://www.solarbatterywarehouse.com.au/solar-battery-shop/...

In an emergency you can leave the house in regular vehicle leaving trailer behind to power the freezer.

In other times it's handy for powering tools away from a main supply.

It's also a honeypot of nickable stuff so it'd be good to invest in quality locks and towball / wheel locks.