Wiring a VSR

Still rewiring the boat and onto the switch and VSR which I had installed by a boat mech.

He has wired the positives to position 1 and 2 on the 4 way switch using 30a cable but looking a diagrams I should have it wired to the positive of each battery.

Should I replicate whats been done or run positive wires to the batteries? At the moment it's running 30a to 115a battery cable...

I think I've come to the answer typing this but keen to hear thoughts.

Posts: 1084

Date Joined: 21/05/12

 go with the manufacturers

Mon, 2022-09-26 13:57

 go with the manufacturers specs - chuck a fuse inline if unsure


scubafish's picture

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Date Joined: 15/08/12


Mon, 2022-09-26 17:37
dmck's picture

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Date Joined: 07/03/19

wiring a VSR

Thu, 2022-09-29 13:20


I'm presuming your VSR has 3 conncetions, Battery 1,   battery 2   and an earth wire.


Battery 1 will be the main starting battery, battery 2 will be accessoriies/house/whatever.


Providing the battery switch reflects these battery numbers (ie #1 is the starting battery)

it does not matter if the VSR is connected to the switch or directly to the batteries


NOTE :  if you are running the motor with the batt-switch set to '2'  the VSR WILL NOT charge batt-1

Jackfrost80's picture

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Cheers mate. Yep that's

Thu, 2022-09-29 14:31

Cheers mate. Yep that's exactly what I have and I run the motor on '1' as my starting motor and have the anchor winch connected to '2'.

dmck's picture

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Date Joined: 07/03/19


Thu, 2022-09-29 20:12

 ... have your motor running (fast idle) when using your winch


Check and se if your FF/chart plotter can show voltage on the screen.  If it can then set it up to have a permanent display.   You will then be able to monitor the charge on batter 2 and watch what happens when the winch is under load.

If you have a voltmeter on the dash, check which battery it is monitoring - probably battery 2 as Im guessing the dash electronics are all battery 2.

If this is the case you should consider adding  a VM showing batt 1 voltages

Jackfrost80's picture

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Date Joined: 07/05/12

All good mate, always use the

Thu, 2022-09-29 22:28

All good mate, always use the winch with the engine. I have voltage display on my Furuno and I have Century battery monitors on both batteries with alerts to my phone if they drop below 70% charge and then again at 50%.

dmck's picture

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Date Joined: 07/03/19


Fri, 2022-09-30 13:04