Quick disconnect for the battery pack

[Benb21601]

My buggy will be spend the majority of its life in the toy hauler waiting for the next camping trip. I am concerned abut parasitic drain or how to prevent it. Dealer said its ok to leave it plugged in all the time which I'm not so comfortable with, or pull off a battery cable, which is a pita. My thought is to fully charge it and then have a battery disconnect to keep the pack from being drained while its sitting. Any advice on a quality disconnect that can handle a 48v cart?

[gornoman]

Removing a single nut from a post is a pain?

Never seen a quick disconnect engineered for this application. Good luck.

[HiTechRedNeck]

If we are talking about this cart from a previous post (48v 2014 txt),
Then you should have a small metal charger with one LED light and a triangle cart plug. Cart would have triangle receptacle with green LED

If this is correct, charger has a built in battery maintenance feature.(per Ez-Go)
Leaving charger connected is good idea.

There are also several aftermarket chargers that have a float charge feature for stored battery maint.

The worst option is to disconnect battery cable.
That would require effort to remember to charge batts every month or so.

[rib33024]

Some thing like this will work

Amazon.com: WirthCo 20387 Battery Doctor Mini Master Rotary Dial Disconnect Switch with On/Off Knob and Bottom Cover: Automotive

Amazon.com: WirthCo 20387 Battery Doctor Mini Master Rotary Dial Disconnect Switch with On/Off Knob and Bottom Cover: Automotive

TerryH used this one on his cart



http://www.buggiesgonewild.com/extre...tml#post879854

[Volt_Ampere]

I doubt very much that part can handle the full battery current. You need a disconnect rated for the max amperage that the cart can draw. Most disconnects are not rated for that kind of current but you can find one that is (or use a FNR switch as a disconnect)

[rib33024]

The one in the pic is the one TerryH is running on his drag cart and he is running 100 and something volts and 1000 amps


And the one in the link is rated for

• Designed for applications up to 48 Volts DC
• Can be used with 1 or 2 batteries
• Disconnect switch is ISO 8846 approved
• Has a continuous rating of 300 amperes, intermittent rating of 1000 amperes/5 seconds and crank rating of 700 amperes/10 seconds

Sounds like it would work to me

[remac]

There are actually a couple of sources of drain for parked carts.
One type of drain comes from the controller and other electronics.
Disconnecting the battery pack will stop that type of drain.

The other drain is internal to the batteries themselves
and will occur whether the batteries are connected or not.

How much parasitic drain are we talking about? .1A, 10A?
How much does voltage drop per week when they are stored?
How long are you talking about storing between uses or charges?

I park my cart in the Winter and recharge about once per month.
I leave them connected with the Run/Tow switch set to Tow.
The SOC (State of Charge) drops to about 85% in a month,
but I am willing to trade off a slightly shorter overall battery life
for the convenience of not going out in sub-zero weather to recharge it.

[Benb21601]

Originally Posted by HiTechRedNeck

If we are talking about this cart from a previous post (48v 2014 txt),
Then you should have a small metal charger with one LED light and a triangle cart plug. Cart would have triangle receptacle with green LED

If this is correct, charger has a built in battery maintenance feature.(per Ez-Go)
Leaving charger connected is good idea.

There are also several aftermarket chargers that have a float charge feature for stored battery maint.

The worst option is to disconnect battery cable.
That would require effort to remember to charge batts every month or so.

Good call...that is the charger I have. But, it also says something about "well ventilated area" which Im not sure the rv applies. Either way, I'm not comfortable leaving it plugged in unattended for days or weeks at a time. I was hoping for something quick and easy (I.e. No tools necessary) to insure the pack stays charged. Thanks all for the replies. My vague understanding is that amperage is more of a player concerning a disconnect than volts. Any idea how many amps I have?

[HiTechRedNeck]

Charger has battery maintainer function,
Designed for long term plugged in applications as per Ez-Go.

Check with JohnnieB. he is battery guru.

We leave multiple carts plugged in unattended every night.
Charger has multiple safety features. Much safer than old transformer chargers.

Well ventilated area is for breathing gas and explosive hydrogen build up.
it would be hard for the gasses to become dangerous in a 10x20x8 trailer.
That would take a lot of hydrogen and real good door seals.

[TerryH]

Originally Posted by rib33024

TerryH used this one on his cart

http://www.buggiesgonewild.com/extre...tml#post879854

That switch is controlling the contactors. The switch is only carrying 12 volts. That setup would work fine to do what the OP wants to do if one wanted to invest in the contactor and the switch.

Something like the Anderson SB350 we use for emergency disconnect would also do the trick. We are breaking 222 volts and 2000 amps BTW :)