Bad Voltage Regulator ...OR?

[Ishrub]

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[Bedifferent]

As it relates to this post...I have been running the SH847 regulator on my bike for several years now and I have noticed my charging voltage runs rather high. My typical charging voltage runs 14.8 to 15 volts all the time. I would not be concerned with 14.5 but 15 volts is really high and excessive. I have tested my output voltage with several of my high quality digital meters as well as my Optimate tester which checks the draw down voltage during starting. All of my testers indicate 14.8 to 15 volts as the charging voltage. My battery is in excellent condition holding a full charge at 12.8 volts. I have observed this high charging voltage on my last two batteries as I generally replace my batteries every 2-3 years even if they are not giving me a problems (an they haven't). Anyone care to comment on this high charging voltage and if maybe you have experienced the same. I'm looking to find another replacement to see if that solves the issue but I'm still looking.

 

[TURBO200R4]

jmo
i wouldn't worry about it till it gets to 17volts then you will start cooking batteries and ecu's

 

[martym52]

As it relates to this post...I have been running the SH847 regulator on my bike for several years now and I have noticed my charging voltage runs rather high. My typical charging voltage runs 14.8 to 15 volts all the time. I would not be concerned with 14.5 but 15 volts is really high and excessive. I have tested my output voltage with several of my high quality digital meters as well as my Optimate tester which checks the draw down voltage during starting. All of my testers indicate 14.8 to 15 volts as the charging voltage. My battery is in excellent condition holding a full charge at 12.8 volts. I have observed this high charging voltage on my last two batteries as I generally replace my batteries every 2-3 years even if they are not giving me a problems (an they haven't). Anyone care to comment on this high charging voltage and if maybe you have experienced the same. I'm looking to find another replacement to see if that solves the issue but I'm still looking.

I haven't tested Voltage. 14.5 to 15 is not uncommon in automotive applications. I'll test it with my Fluke meter next time I fire it up, likely tommorrow.

 

[martym52]

Checked at the battery tender plug. V = 12.85 running; V = 14.3

 

[martym52]

Checked at the battery tender plug. V = 12.85 running; V = 14.3

I haven't tested Voltage. 14.5 to 15 is not uncommon in automotive applications. I'll test it with my Fluke meter next time I fire it up, likely tommorrow.

 

[Bedifferent]

Checked at the battery tender plug. V = 12.85 running; V = 14.3

Interesting.....14.3 volts seems more in line with what it should be.

 

[martym52]

Interesting.....14.3 volts seems more in line with what it should be.

Tender plug goes direct to the battery terminal.

 

[Bedifferent]

Interesting.....14.3 volts seems more in line with what it should be.

Tender plug goes direct to the battery terminal.

Exactly where I take my measurements from.

 

[Bedifferent]

As a follow up comment on the question I ask about charging voltage...I got in contact with Roadstercycle about buying a new regulator to try. I explained some of my charging results and got a quick reply from Jack Fleming who I believe owns the the site. He said he routinely bench tests all the R/R he sells before he ships them. He stated "On my bench test machine under very little load I see about 14.8 to 14.9 volts consistently, when I load them up I see in the 14.6 volt range".
I also was looking through my Rocket 3 service manual at some of the troubleshooting charts for the electrical system. I saw under some of their testing procedures this information... I guess that 13-15 volts would be typical charging voltage one might expect to see. Thanks