DIY electric lawn tractor

[bluedog225]

I bet you guys know stuff about lawn tractors. I’m not impressed with the currently available electric stuff (Ego, Ryobi, Greenworks).

What lawn tractor would you pick as a base for an electric lawn tractor and mower?

They are all available. Assume the engine is trash. Husqvarna, Deere, cub cadets, etc.

I don’t want to reinvent the wheel. Replace the engine, throw in one or two of 48V 100 amp hour lifepo4 rack batteries, a controller, motor(s), fuses, and get it cutting grass.

I’m betting some are better suited than others. What’s the best base unit?

Thanks

 

[OccupantRJ]

An older 318 John Deere would be a bulletproof chassis. I own one and it is more garden tractor level than mower. However, it does have hydraulic power steering and accessory lift. Other 200 or 300 series units are likely manual, but I am unfamiliar with which ones.

 

[Gmonkee]

I would go straight for a most basic MTD version with the 6 speed fender shift and no hydraulic system at all. Lots of brands carry them. Mount the motor and align the pulleys then place the batteries.

Not the most efficient chassis but one that requires the least adapting to the new power.

 

[bluedog225]

I would go straight for a most basic MTD version with the 6 speed fender shift and no hydraulic system at all. Lots of brands carry them. Mount the motor and align the pulleys then place the batteries.

Not the most efficient chassis but one that requires the least adapting to the new power.

Modern Tool and Die? E.g. Cub Cadet

 

[Gmonkee]

Modern Tool and Die? E.g. Cub Cadet

No, the OEM of the cheap low end riders branded under a billion names.
The ones no one fixes when the engine pukes.
Used to be Murray long ago.

 

[Bessy]

Now this sounds like it's gonna be fun!

If I may pose a question: what powerplant are you planning to use, and in what configuration? I wonder if getting a rough idea of the size of componentry might be a good starting point and working backwards from there? In general I don't exactly expect that it matters what chassis you go with ultimately, does it?

 

[tyyost]

I pondered this question, read the replies, and slept on it. Here’s my 2 cents. To me a riding mover is all about the cut. I’m not looking for a striped lawn but I want a great one pass cut. So a good deck, with adjusting wheels, replaceable components and quality steel is important. Second is the drive system and controls. There are lots of cheap Hydro transmissions in low end tractors that don’t do well long term. I’d be looking to consider a manual geared transmission or a bigger garden tractor with a sturdy Hydro.

The only other considerations would be frame type. A ladder style with a motor plate will obviously be better suited to your swap. Gas tank under the rear fairing would give you room for batteries. A better question may be what garden tractors lend themselves to performance engine swaps? Then you could start with a solid platform that could take abuse and build from there.

 

[bluedog225]

Something like this.

 

[Stuart in MN]

If you can find one, a GE Elec-Trak lawn tractor from the early 1970s would be a good start. They were already electric, I think the only thing you'd really need to do is replace the old lead acid batteries with something more modern and with more capacity, but a modern electric motor could probably be adapted too. There weren't many to start with so not many are left but as I recall the chassis was pretty heavy duty.

 

[bluedog225]

And the 48V 100 amp hour lifepo4 rack battery is going to run about $1,000.

That’s $2,500 or so if I shop around. Plus balance of system and repairs to the vehicle itself.

Hoping to find a brand that has good bones and replacement parts. Old cub cadet or deere seem like front runners.

 

[OldDoItAll]

New, DIY 48v Electric Lawn Tractor Conversion Manual and plans

The manual contains over 70 numbered pictures, an instruction manual, electrical and mechanical drawings and suppliers to convert a old gas lawn tractor to electric battery power, comes with 2-year email support should you need help

electrictractor.net

 

[bluedog225]

New, DIY 48v Electric Lawn Tractor Conversion Manual and plans

The manual contains over 70 numbered pictures, an instruction manual, electrical and mechanical drawings and suppliers to convert a old gas lawn tractor to electric battery power, comes with 2-year email support should you need help

electrictractor.net

Interesting. Thanks!

 

[Bessy]

Something like this.

Do you have the video link referenced in the screenshot here, by chance? Would love to take a look at that just for curiosity's sake.

I do agree with @Stuart in MN that finding an old GE would be a great starting point, if one could be acquired. It would be a cool restomod kind of situation to just give one of those a heart transplant.

I don't have the property or the need to justify a riding mower (despite owning two located at my parent's property) but I have not been super happy with the availability of front wheel drive battery electric mowers on the market. I currently run a 2009 Toro Recycler with front wheel drive that I can't seem to kill, but I have toyed with the idea of electrifying it when the engine eventually dies.