Tracker 190 Battery Voltage Question on HDS

[jyu87]

Feel this thread could be in a few different locations, but why not ask the smartest Tin guys out there.

Currently running the my 2 HDS units to the stock Interstate battery that came with the boat. I believe it's a group 27 battery. I put my Voltage overlay on my graphs and am currently showing around 12.1 volts. is this accurate?

I searched and read all about cranking voltage and operating voltage. Is there a good rule of thumb someone can shed?

Thanks in advance, apologies if I should of put this thread elsewhere.

[Transom]

It is accurate within the unit’s tolerance at the unit. Is it wired to the battery or to the fuse block? If you wired to the fuse block there will be a drop between the battery and the fuse block.

I recommend using a meter to read the actual voltage at the battery if you need a reading that you can trust.

[jyu87]

It is accurate within the unit’s tolerance at the unit. Is it wired to the battery or to the fuse block? If you wired to the fuse block there will be a drop between the battery and the fuse block.

I recommend using a meter to read the actual voltage at the battery if you need a reading that you can trust.

Makes sense. For some reason I didn't think about it like that. I'll check the battery source.

[shfishinsticks]

I have a 10 at the bow and a 7 on the dash, both connected to the same battery. The bow unit reads a lower voltage than the dash unit due to the longer wire run to the bow. I also believe the OEM wiring is too small for a run that long. I plan on upgrading the wiring this spring.