I thought I had reposted a chart on the Greenworks mowers somewhere, but I can't seem to locate it at the moment.
However, you can calculate fuel/electric cost differences here:
STEP 1: We've prepopulated this form with national averages for cost of electric and gasoline. Select your State Gas Price / Gallon Price/kWh: Gas and electricity prices sourced from eia.gov STEP 2: Choose the equivalent Greenworks Tools™ and equipment by category Equipment Category: ANY...
www.greenworkscommercial.com
The question is about how much you're using it. If you're mowing your lawn for 15 minutes every two weeks, then the commercial grade mower is probably not the one for you.
If you are doing commercial mowing with it, then it may be worth it.
They're supposed to be quite a bit quieter which would be nice.
Say you're mowing for 700 hours a year at 1.5 gallons per hour and $4 a gallon, and you're up to over $4000 a year in gas or diesel. And if electricity rates are reasonable, it might be a couple hundred in electricity. I don't know how the maintenance costs add up, but you have the periodic oil and filters to change for the gas/diesel engines.
Anyway, if you save $4000 a year in operating costs, then over the period of a few years it will save the capital cost difference.
Each business will have to determine if it meets their goals.