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Old 11-22-2020, 03:28 PM   #1
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House Batteries Spark

I have a 2013 HR Vacationer and have had this issue since we purchased it in 2016. I disconnect my house batteries, 2 @12volts, when I put it in the storage lot by removing the 2 negative terminals from the batteries. I do this to maintain their charge while in storage.

My question, is it normal to have "small" sparks when I reconnect the negative terminals?

According to the Owners Manual, small sparks are due to the inverter circuit.

One of the negative cables is connected to the frame.

Does anyone else have this situation??
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Old 11-22-2020, 03:41 PM   #2
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If anything is connected to the 12 volt system of your house batteries, which there usually are they will give a spark once connected. Even when the salesman switch is turned off.
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Old 11-22-2020, 03:45 PM   #3
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The Inverter will cause a spark when the house battery cable is connected - from the capacitors in the Inverter. The Inverter is connected directly to the batteries with its own cable. I assume that is the cable connection you are referring to.
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Old 11-26-2020, 07:43 PM   #4
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After you install the battery cable, remove it and reinstall it again. If you get a spark the second time, you have a load some where. If you get no spark the second time, it's just some capacitors charging up.

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Old 11-26-2020, 08:00 PM   #5
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You are pulling a battery cable because the disconnect switch doesn't disconnect everything - notably the inverter/charger. If you do this often consider to install a battery disconnect switch right at the battery bank.
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Old 11-29-2020, 08:35 AM   #6
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Quote:
Originally Posted by denk View Post
I have a 2013 HR Vacationer and have had this issue since we purchased it in 2016. I disconnect my house batteries, 2 @12volts, when I put it in the storage lot by removing the 2 negative terminals from the batteries. I do this to maintain their charge while in storage.

My question, is it normal to have "small" sparks when I reconnect the negative terminals?

According to the Owners Manual, small sparks are due to the inverter circuit.

One of the negative cables is connected to the frame.

Does anyone else have this situation??
Every one has this. Perfectly normal. There are always some things that don’t have an off switch. Best to disconnect or put in a trickle charger
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Old 11-29-2020, 11:10 AM   #7
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Quote:
Originally Posted by vsheetz View Post
You are pulling a battery cable because the disconnect switch doesn't disconnect everything - notably the inverter/charger. If you do this often consider to install a battery disconnect switch right at the battery bank.
We have some parasitic loads that draw down our batteries over time so in storage we disconnect as well. And we get the spark
Looking to install this 500 amp Disconnect:
https://www.flamingriver.com/fr1046-...ck-out-bracket

Stay Safe,
greg
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Old 11-29-2020, 11:20 AM   #8
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Yiiiiip,
I get it too, each and every time I yank all four 6V batts for cleaning and maintenance. And yep, the house battery switch is in the OFF position. I figured it was the inverter/charger. I would think that, if there's that kind of spark, (almost no matter what size the spark is), that something would eventually get damaged inside that inverter by causing that 12V surge each time the batt posts are connected. But, so far, everything still works so, no damage yet.
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Old 11-29-2020, 06:28 PM   #9
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The propane detector is on at all times unless the batteries are disconnected. This is so if the disconnect switch is off it will still work.
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Old 12-09-2020, 07:19 AM   #10
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I know this post is almost a month old but a question - when disconnecting / connecting battery cables on a diesel - is there a specific procedure as to which cable ( + or - ) gets disconnected / connected first?
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Old 12-09-2020, 07:35 AM   #11
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If you have a magnum inverter you disconnect its positive 1st according to magnum.
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Old 12-09-2020, 07:46 AM   #12
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The negetive terminal is the safest one to remove first. That prevents the tool from creating a dangerous spark and short to ground.
If the tool was touching the positive terminal and touched ground, with ground still connected, that will cause problems.

Magnum does recommend removing the positive cable first.
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Old 12-09-2020, 12:40 PM   #13
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Quote:
Originally Posted by rfg9585 View Post
If you have a magnum inverter you disconnect its positive 1st according to magnum.
^^This.

To prevent the issue Twinboat describes, use an insulated tool. I have a specific tool just for this purpose. Quarter inch drive ratchet with the socket and ratchet completely covered with insulating material.
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Old 12-10-2020, 05:23 AM   #14
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Good to know - thanks.
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