Voltage
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Tourer
Joined: Aug 2007
Posts: 391
Likes: 22
From: Wisconsin
Voltage
While playing with my Power Vision and selecting a multi screen of information I am curious what the voltage should be. I am not concerned, and curious if my bike is "normal". The stock gauge always shows 14 so I never thought about it. The PV is obviously a bit more accurate as in showing more digits. While cruising between 65-70 with RPM's 2500-2700 the Power Vision is stating it is at 13.8-13.9 volts.... Is this an indication of something potentially not right, or is this "normal". This is on my 2015 Ultra Classic, running down the road with the radio on, driving lights on, and PV hooked up. Pretty much stock electrical wise, and the LED lights I installed were not on.
Again I am not concerned with the number, just looking to make sure it is normal as I never really knew what the number was or should be. Bike runs and starts fine, new battery last season. I honestly never gave it a thought until I modified the screen to show multiple items displayed.
Again I am not concerned with the number, just looking to make sure it is normal as I never really knew what the number was or should be. Bike runs and starts fine, new battery last season. I honestly never gave it a thought until I modified the screen to show multiple items displayed.
Seasoned HDF Member
Joined: Mar 2010
Posts: 38,415
Likes: 6,366
From: Honah Lee
Perfect normal. Battery voltage for a charged battery is 12.7 or so. Can be 12.5 or so. So depending on the charge, the regulator regulates how much comes out. The bike uses alternator for power. and charges battery. It should never be over 14.9 or so. 2000 RPM is test range.
When you have a maintenance charger on and take it off. A handheld meter put on battery will show the surface charge from charger like 13.8 or so. Hit the key on and lights will kill that back to 12.7 in seconds. Voltage should never drop below 9.6 when cranking. Shows a warn out battery, loose or corrosion connection or a battery that needs charging.
When you have a maintenance charger on and take it off. A handheld meter put on battery will show the surface charge from charger like 13.8 or so. Hit the key on and lights will kill that back to 12.7 in seconds. Voltage should never drop below 9.6 when cranking. Shows a warn out battery, loose or corrosion connection or a battery that needs charging.
Last edited by Jackie Paper; Aug 9, 2019 at 07:28 AM.
Mine with the Pv was always 14.10 . Then one day my regulator took a dump. I got one thru Amazon bevel is the company I think. Now my volts are at 14.70 which is great since I have extra lights and a fan assist cooler.
More volts isn't always better
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Seasoned HDF Member
Joined: Sep 2017
Posts: 12,218
Likes: 4,930
From: England
More volts isn't always better
It is the power output you should focus on and do current calculations based on a 12volt supply to see if you have enough oomph for your extra parts.
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I see it fluctuate between 14.50 and 14.70 thru out the day . So your saying that the battery can possibly have a shorter life span because the charge rate is .40 to .60 higher than before? Well if the batt dies tommo I got 4 years out of the batt. come January will be 5 years.
Seasoned HDF Member
Joined: Sep 2017
Posts: 12,218
Likes: 4,930
From: England
At 14.7 volts you are okay. If it were constantly at 14.9 volts that is where I think the battery will be slightly overcharged and hence shorten its life.
My last two cars at ten years old were still on their first battery when I sold them. My current car is 4 years old so we will see how this one does.
To only get 4 years from a bike battery is not very good.
C-Tek chargers have option for AGM and that voltage is 14.7. I would take that as the maximum. Over that and I would be concerned something is wrong with the regulator on your bike, despite the fact the diagnostic manual thinks it is fine so long as the voltage is not greater than 15 volts.
This all starts to get complicated when looking to get maximum life from a battery as temperature also plays a part.
https://batteryuniversity.com/index....d_acid_battery
Well if the batt dies tommo I got 4 years out of the batt.
To only get 4 years from a bike battery is not very good.
C-Tek chargers have option for AGM and that voltage is 14.7. I would take that as the maximum. Over that and I would be concerned something is wrong with the regulator on your bike, despite the fact the diagnostic manual thinks it is fine so long as the voltage is not greater than 15 volts.
This all starts to get complicated when looking to get maximum life from a battery as temperature also plays a part.
https://batteryuniversity.com/index....d_acid_battery
Last edited by Andy from Sandy; Aug 14, 2019 at 04:33 AM.