Yet another charger question - 48v RXV

[tarmfield]

Hi all,

Have recently bought a cart and done a bunch of upgrades, its a 2009 EZGO RXV and it seems real solid. The batteries are Trojan 1260 with a watering system from Jan 2016 (A6) on posts. They seem to hold a decent charge - enough to drive around for a while - am currently charging and monitoring voltage drop over time to figure out if they need replacing.

Now for the question: The cart for some unknown reason came with a Yamaha charger, model SCR481717, with the EZGO RXV plug attached - is this an issue?

The charger seems to be working fine, will charge the cart up to 52.9v after 3 charges, and i bought a battery maintainer to keep it topped off as this charger doesn't have a float / trickle mode.
The sticker from the charger is hopefully attached to the post showing the details.

Thanks for your help!

Toby

[cgtech]

That is a Yamaha charger produced by MAC for Yamaha. It's a pretty good charger, better than the stock charger equipped with a RXV. I don't see any problem with using that charger. If you do end up doing batteries, don't get T-1260 batteries. Either go with a 8v battery tray & T-875 batteries, or at least T-1275 12v batteries. Putting the highest capacity battery you can in there will ensure longest lifespan, due to higher average State of charge over the life of the battery.

[tarmfield]

So what voltage should the charger charge the battery pack up to - it seems to vary depending on the usage?

I have been trying to recover the batteries and charging it multiple times with no usage - initially it charges to 50.3 to 50.8, then if I plug it in again after that round of charging it will take it up to 51.3, then if I plug it in again for a 3rd time (No usage between charges) then it takes the voltage up to around the 53v mark.

I also bought a maintainer charger from Amazon as the charger doesn't have a float mode to keep the battery topped up - this seems to take the pack to around 53v, all readings are taken straight after charging is finished and the charger has been disconnected.

I ran a timed charge test over 48 hours to see how the batteries would hold there charge but will post those results separately - main thing I am trying to find out is whether this charger is OK or I need to put it on charge twice to get it to 100%?