[RE-wrenches] Consumption limiting meter

[Benn At DayStarSolar]

Wrenches, 
This is a request for a colleague. Anybody have suggestions where I could access a consumption limiting kWh meter with the following characteristics?

> 120VAC 30A
> Displays accumulated wattage and turns off power access at a preset point.
> Resettable after 24 hours.

It is for a campground solar system.  The visitor pays a daily fee to have access to say 1.5kWh of electricity per day.  They can see how their account is doing by reading the meter.  When their consumption reaches 1.5kWh the meter, through a relay, turns off the power.  It resets automatically or manually the next day.

Thanks,
benn
Sent from a 'smart' phone, with touch screen keys. Please excuse shortcuts and typos. 
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