Is my Electrosport Stator Defective?

[Sam P]

20 hours ago, docc said:

 

Let's talk batteries, @Sam P.

Did you replace the "destroyed Odyssey" with another Odyssey, or something else?

A voltage loss from 13.0 to 12.7 in an hour is not a good sign for an Odyssey. There are specific parameters to "condition" the Odyssey that may help contribute to a solution. "trickle chargers"/ "tender" are known to be damaging to the Odyssey battery unless the voltage is adequate, yet will not "charge" the Odyssey with sufficient amperage (at least 6 amps).

I replaced the blistered and bloated Odyssey last month with a new one, just before I started this thread.  I've skimmed through your Odyssey Battery Conditioning thread (20+ pages!) and have ordered what I believe is an appropriate charger.(Battery Minder 128CEC2, which I believe replaces the older 12248 model). Will condition my battery asap, but I assume I can continue to troubleshoot my charging issues in the meantime. I am still keeping the battery on my trickle charger, which keeps the volts at 13-13.4, and I hope this isn't hurting the battery.

[docc]

1 hour ago, Sam P said:

I replaced the blistered and bloated Odyssey last month with a new one, just before I started this thread.  I've skimmed through your Odyssey Battery Conditioning thread (20+ pages!) and have ordered what I believe is an appropriate charger.(Battery Minder 128CEC2, which I believe replaces the older 12248 model). Will condition my battery asap, but I assume I can continue to troubleshoot my charging issues in the meantime. I am still keeping the battery on my trickle charger, which keeps the volts at 13-13.4, and I hope this isn't hurting the battery.

Good call on getting the approved charger.

Odyssey states that float voltage below 13.2v will shorten battery life. What is your trickle charger's voltage?

[docc]

4 hours ago, docc said:

How about running a jumper wire from the battery positive to the black wire into the regulator  (turn the connector 90 degrees to leave the white->blue connected). KOEO: battery light on? Start up and normal charging at some rpm with no 4000 rpm light?

 

 

1 hour ago, Sam P said:

No battery light with a jumper wire from battery + attached, key on engine off......

Did you start it to see if it charges with the jumper wire to the black wire of the regulator?

Next, I would jumper the other side of the connector (battery voltage to the white wire and the connector rotated to connect the black --> red/black.

I don't think the light will come on at all in that configuration. Looking for the charging voltage to come up while running above idle. . .

[Sam P]

17 minutes ago, docc said:

Good call on getting the approved charger.

Odyssey states that float voltage below 13.2v will shorten battery life. What is your trickle charger's voltage?

12v/1.25 Amp

[Sam P]

17 minutes ago, docc said:

 

Did you start it to see if it charges with the jumper wire to the black wire of the regulator?

Next, I would jumper the other side of the connector (battery voltage to the white wire and the connector rotated to connect the black --> red/black.

I don't think the light will come on at all in that configuration. Looking for the charging voltage to come up while running above idle. . .

Did not start it up. I will do this tomorrow morning and report back. Need to get some better terminal connections for the jumper wire if I am going to fire up the motor.

Edited 1 hour ago by Sam P

[docc]

On 9/21/2025 at 9:57 AM, Sam P said:

With ohm meter set at 200, I got 15 ohms, between the blue wire and the center terminal pictured below. What does this mean? I know it's very basic but my electrical knowledge is poor.

(If you meant by "center terminal" the terminal centered below my arrow, the resistance there was zero).

I get 15.9Ω with this same test.

[docc]

11 minutes ago, Sam P said:

12v/1.25 Amp

With the trickle charger connected to the battery, test the voltage across the battery terminals (charge voltage).

Most common "trickle chargers" will be below Odyssey's 13.2v minimum threshold.

[gstallons]

6 hours ago, Pressureangle said:

Haven't bread each response, on the road- but *any* wire circuit should show very near zero ohms. If the lamps are in this circuit, maybe ok. If not, a serious fault. 

The bulb is in this circuit. IDK what r value is for the bulb , BUT i am happy.

[gstallons]

6 hours ago, Sam P said:

Just did this with key on/engine off, and the battery light did indeed light up.

Are we making some progress here? I hope so!

The red/green wire that had a wire nut at the end , did you connect it to anything ?

[docc]

3 minutes ago, gstallons said:

The red/green wire that had a wire nut at the end , did you connect it to anything ?

Pretty sure @Sam P posted the answer to this on page 8 . . .

On 9/20/2025 at 7:33 AM, Sam P said:

Yesterday I checked and cleaned all the battery connections and they are good. My F3 is now bypassed with a new 10AWG wire - with inline 30A fuse - from battery + to the two red wires at the regulator.

 

[Sam P]

57 minutes ago, docc said:

With the trickle charger connected to the battery, test the voltage across the battery terminals (charge voltage).

Most common "trickle chargers" will be below Odyssey's 13.2v minimum threshold.

Just went out to the garage - the DMM reads 13.12v with the Battery Tender attached.

Close but no cigar?

[docc]

20 minutes ago, Sam P said:

Just went out to the garage - the DMM reads 13.12v with the Battery Tender attached.

Close but no cigar?

Exactly. Over time, that low float voltage (below Odyssey's 13.2 minimum threshold) will "shorten battery life". How much? Unknown. But undesirable. Your new charger is likely configured to address this. 

Rather than the "tender" approach, I have grown fond of charging the Odyssey with at least 6 amps up to 15.0 volts, then float charge at 13.56v (what my EnerSys charger will float) for maybe 24 hours, then terminate charge and let the battery gradually discharge. Repeat when the static charge reaches 12.65v.

_____________________________________________________________________________________

>  LESS voltage on trickle/float is NOT okay. Odyssey states that floating under 13.2 damages the battery:

"Note, however, that the charge voltage should not be

dropped below 13.2V as that will cause the battery grids

to corrode faster, thereby shortening the battery life."

 

[docc]

On 9/12/2025 at 2:04 PM, Sam P said:

Have been hanging out here since February - trying to learn stuff - when I bought a nice low mileage 2001 V11S. Rode 6K fun miles between then and August, with no drama, and then the charging system started acting up: first overcharging and destroying a new Odyssey battery, and now, the charging light comes on and stays on when the engine hits 4K rpm. I've been through the ten or so threads on here related to charging, and have learned quite a bit. This is forum is an amazing source of Guzzi knolwedge!

So I bought and have installed a new Voltage Regulator (ESR515) and Stator (ESG814) from Electrosport. Still, the charge light comes on at 4K rpm. 

If I am reading this correctly, the odd charging light behavior started after the battery got cooked. And did not change with the new stator and regulator?

Makes me think something also got cooked in the harness/connectors - seemingly in the circuit involving the instrument panel . . .

[Sam P]

2 minutes ago, docc said:

Exactly. Over time, that low float voltage (below Odyssey's 13.2 minimum threshold) will "shorten battery life. How much? Unknown. But undesirable. Your new charger is likely configured to address this. 

Rather than the "tender" approach, I have grown fond of charging the Odyssey with at least 6 amps up to 15.0 volts, then float charge at 13.56v (what my EnerSys charger will float) for maybe 24 hours, then terminate charge and let the battery gradually discharge. Repeat when the static charge reaches 12.65v.

Good news. Just got an email from batterystuff.com with a UPS tracking # and the charger is scheduled for delivery this Friday. 

Not to derail my own thread on my charging issue, but it sounds like going forward I should stop using the Battery Tender and use your protocol quoted here, amirite?