Upgraded my Ryobi riding mower (not zero turn) over the weekend with (2) Eco-worthy 48v 50ah metal cased batteries.
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They were on sale for $368 each, with free shipping, so the deal was too good to pass up. The OEM AGM batteries were no longer strong enough to let me cut the front and back yards in a single day. The 50ah packs fit easily in the battery tray for the riding mower, with plenty of room to spare and the mower runs without needing a pre-charge resistor or rewiring.
I gave it test run yesterday, and cut the entire yard today without issue. My back yard has a steep grade and the mower had no issues with power or BMS tripping at all. I might have been able to get away with just 1 pack, but I wanted the extra amps for the hills.
I think the biggest difference is the power of the blade motors, especially in heavy grass. I overseeded with annual rye and the AGM's would really bog down on the hill when it hit the dense grass, the blades would sometimes quit on the really thick patches. That issue is gone with the LFP packs, and the resulting cut quality shows up as both blade motors resist bogging down when it's really thick.
I am using the SC-48 charger with the new packs, but I don't leave it unattended. It's plugged into a smart switch and I've been testing how long the pack needs to charge based on voltage. I'm just charging up to around 80% since they appear to have power to space. If you thought the on board SOC meter was bad with AGM, you should see how useless it is with LFP. It never moved off 100%. The on board volt meter consistently reads .1 volt off from the packs themselves, I assume there is some averaging going on in the controller.
Just wanted to share for those who might be looking for options.