The simplest and easiest LiFePO battery conversion for all Ryobi 48 volt lead-acid battery mowers

As promised, I am posting the final completed version of my simplified absolutely easy LiFePO upgrade of my Ryobi RM480ex riding lawn mower using the $400 Eco Worthy 48 volt LiFePO purchased on Amazon.

All the original battery brackets and lead-acid batteries were removed from the slide out battery tray and discarded, since the parts were no longer needed. Only the main positive negative cable with the gray Anderson connector is reused.

The blue charging connector was disconnected as well as the black cube shaped charger lock out relay and the now unneeded black rectangular temperature sensor connected to the negative battery post.

The original charge port is removed by taking off three Phillips screws off the back of the port.

The connector for the black cubic charge lock out relay is cut off. The yellow and red wires are stripped and connected together.

The rest of the charge port assembly is not reused.

The Eco Worthy battery is placed on the slide out tray and its boundaries are marked.

3M double stick tape (I used the clear instead of the foam which will retain moisture.) is placed within the space on the tray where the battery will sit. The battery is then secure with the tape.

I used an 8 foot long luggage strap in an X pattern to hold down the battery. Any similar luggage strap will suffice.

I then cut out all the protrusions within the charge port cavity and drilled half inch holes in the three places with a step drill bit. Since only the top hole is needed to the small XT60 socket, I covered the two bottom ones with half inch hole plugs,

I fabricated two cables with 15 amp fuse and holders to make the charge cables. The 3/8 inch ring connectors were attached to the end to be connected to the main battery.

I used 1/4 inch insulated spade connectors to connect the other ends of the XT60 socket to the fused charged cables. THey will go through the 1/2 inch hole to connect to the charge cables, but will not allow the XT60 socket to fall through. The positions of the male female connectors were reverse between the two cables to allow only the positive cable to be connect to the positive position on the socket.

The photos show how the charger is connected with an extension XT60 cable with male and female ends,

 

The parts for the wiring must be purchased in large quantity. I have enough stuff for five more conversations.

If anyone here is interested, I can make up a complete kit of parts including the connectors, luggage strap, 3M double stick tape ready to use. It will not require any crimping and soldering of wires. I will also make a plug-in jumper for the charger lock out relay connection, so you will not need too strip and connect wires. The double fused direct charger wiring harness will be fully assembled and needs just to be plugged together.

All you will need us a 1/2 inch preferably step drill bit, Torx 30 bit, a ratchet, 12 and 13mm sockets and t h e same sized combination wrenches to do the complete conversion.

Just to recoup the cost, it would be a nominal $50 delivered for the kit.

Search for the Eco Worthy 48V 50Ah metal case lithium battery on Amazon; the 48volt EZGO charger on Amazon, and any of the Xt60 male to female extension cables. With my kit, those are the only three things that you need.

The battery and charger should look like there photos.

 

Welcome. If you do a search on n eBay for the "P3628 charger," you can get it for less than on Amazon.