FYI, there are DIY kits available to do an electric conversion on most gas-powered lawn tractors, and they sell for $2,000 less than the Ryobi tractor.....
Thanks for pointing that out, interesting. I can't see such conversions costing less than the $700-900 difference in price though. The Ryobi 100Ah/48V is ~$2.9K, around $1K more than a comparable gas unit. But the benefits (as partially covered above post) make it worth to me ATT: no fuel, oil, belts, etc.; keep it plugged into the charger, don't take the batts below 50% discharge, etc., and it's almost hassle-free, hopefully reliable and durable, hell at my age one of my kids will enjoy it for years :]... (recently got an SUV, the 'Burban is tired, would have jumped at an EV or Hybrid one at a reasonable price, but those few available are still way too pricey for me, and seem small compared to the ol' K1500 GMC 'burban).
The batteries alone (SLA AGM or gel deep cycle, 300-400Ah total cap, 4 12V batts in series) cost almost that much (I know: use cheaper golf cart batts instead...still $4-500/set last time I checked). Plus the cost of the drive and deck motors, wiring and controls...
Rather place an order, get the pallet delivered (700#), unpack and put it together, charge it, and cut away.
PS: Consumer Reports did a review a while ago, don't know if the link will work for y'all, might have to be a subscriber:
https://www.consumerreports.org/lawn-tractors/ryobi-r48110-electric-riding-lawn-mower-is-worth-a-look/I know because I've wanted to refit my diesel aux powered sailboat for years to an electric auxiliary, and have watched the topic (complicated) and market fairly closely. The electric conversion systems on the (boat) market are still way too expensive for me (batts + propulsion), but with solar and wind gen, would be real nice to have.
If the Yanmar diesel itself needed replacing, the cost delta would improve to a 'maybe' (small marine diesels are often the same basic engine used in millions of land/construction uses, but are always much more $$$...).
Of course on a sailboat, an electric/diesel aux propulsion plant is just that- a secondary source, wind being primary, not so for a lawn mower. And yes, you can assemble and build your own electric propulsion and save a little money. Then there's the issue of lithium lifepo4 batts versus LA: $$$ v. $...
Besides, on my 20yo Craftsman 22hp lawn tractor the deck is becoming the main headache. The sand, very tough vegetation, heat, etc., here is rough on a mower.
It's time. Yes, I have both a gas and electric push mower, which is OK for trimming around the house, but getting old for the whole enchilada.
Dang, front this AM has it down in the 40's, maybe 50 something later today, but 70's tomorrow.