It will get there I suspect, the tools and batteries can charge in the truck en route. Easier to just fuel up the truck once instead of filling up little gas tanks all the time.
Charging using the truck would require running the truck all day -- probably not an acceptable alternative. Consuming 2-10 Kw from a 200 Kw engine would be so inefficient that it'd be too expensive anyways. Instead you'd need to run a generator all day charging batteries.
A fast charging, high capacity tool battery takes at least 60 minutes to charge. In high power applications (lawn mower, leaf blower, chainsaw, etc) those batteries might be emptied in a little as 15 minutes.
A better alternative might be corded 240v tools running directly off the generator for high-power applications. 120v tools are limited to 2-3HP which doesn't compare well to gas engines.
Instead buy 120-volt and 240-volt leaf blowers. BTW 2-3 horsepower is plenty (probably too much) for one man.
We use water hoses w/o bitching too much. We could used corded leafblowers tomorrow. Or butch up, get rakes and get in shape: cleaner air, more exercise and longer hours for the lawn laborers.
If you had a serial plug-in hybrid with a 20+Kwh battery which also supported exporting 120vac, that would work. AFAIK such a vehicle doesn't exist in North America yet and might not exist anywhere globally.
You start stacking energy efficiency losses (engine -> charger -> battery -> inverter -> charger -> battery -> motor) and economic losses (expensive serial hybrid, higher than expected vehicle battery cycles, still need a large number of tool batteries which wear out in about a year, etc.) though.
I am sure it will, its just no where close yet imo. Truck charging is not as practical; if the crew is running a tight ship, they should not be far between jobs. So you would basically need a lot of batteries to sustain a day full of jobs.
A fast charging, high capacity tool battery takes at least 60 minutes to charge. In high power applications (lawn mower, leaf blower, chainsaw, etc) those batteries might be emptied in a little as 15 minutes.
A better alternative might be corded 240v tools running directly off the generator for high-power applications. 120v tools are limited to 2-3HP which doesn't compare well to gas engines.