09-15-2017, 07:21 AM | #1 |
Not Yet Wild
Join Date: Aug 2015
Location: New England area
Posts: 54
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Varistor MOV
Hello All
I installed a Curtis 500amp controller on my 1999 36V Shuttle 950 and as I was connecting the wires I broke my stock MOV. I contacted EZ-GO dot com and found the replacement MOV. I wrote them and informed them I have upgraded to a PQ motor and the Curtis 500 controller. I asked if this was the correct MOV as my plans are to eventually convert to 48V with my next battery purchase. Here is their response; Please see the below comments from our technical support. That MOV would have been on the vehicle as a requirement of the controller. If the customer has replaced his controller with an aftermarket one, I feel like he would not need it or he needs to consult the supplier of his controller. That MOV is rated at 75Vac/100Vdc. I would think he would be OK if he goes to a 48V pack as he should not allow his voltage to get much higher than 67V. However, this too would be dependent on the settings of his aftermarket controller. I have texted Buggies Unlimited (thats where I bought the controller) and have asked for their input. What are your thoughts? Do I need a MOV or not? |
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09-15-2017, 08:10 AM | #2 |
Gone Wild
Join Date: Aug 2011
Posts: 553
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Re: Varistor MOV
Metal oxide varistor it is there to protect the electronics from high voltage spikes you can get them for probably a dollar or two so use it.
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09-15-2017, 08:39 AM | #3 |
Gone Wild
Join Date: Sep 2012
Location: Charlotte, NC
Posts: 9,329
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Re: Varistor MOV
I agree with the tech support, this is a design issue with the particular controller circuit, component selection and implementation.
I have never seen a MOV used or needed in any other Controller design. |
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