First I wanted to reach out to other members of the group to see if anyone is experiencing the same issue and lack of customer support from Sterling.
I recently received a Sterling 40 amp battery charger
from Defender being sent Fed Ex to Tahiti
. I know I know when I use the word Tahiti
in anything I am complaining about I get no sympathy. But after paying the freight and customs
it came close to the price
of a charger
Since then I have written to Sterling at least 7-8 times trying to get some tech support regarding my issue. In all fairness I have been hearing from the Sterling guy in the US who is does not have the technical background to answer my questions and just today referred me to the UK.
I have heard from another yachtie who has gone thru 4 Sterling 40 amp chargers because of almost identical issues.
Here is my summary
Model: Sterling Power 40 Amp ProCharge Ultra Marine Battery
Company: Defender Marine
Unit was replacing a ProNautic 40amp battery charger that was 6+ years old. Pronautic and Sterling jointly shared development and units are identical except for labeling. Older Pronautic was w/o auto conservation mode.
Install was simple and basically a drop in.
4@ 6V golf cart wet deep cycle configured into 2 12V banks
from charger to battery are #8 length of run < 3í
Charger is used while at the dock
using 220V or while at anchor
using our Honda
1000 110V generator
Both older Pronautic 40amp and new Sterling 40 amp are run in same exact method.
When installed the unit was configured as:
Setup as PS
Custom Setup Bulk 14.7 Float 14.6
Battery Temp lead connected
All lights looked normal and no errors encountered
Power supplied by: Honda
1000 110V generator
Problems & Issues
Day 1 & 2
When first installed I ran a Equalize cycle on battery bank 1 and the next day on battery bank 2. No issues with equalize cycles on 2 separate days
Battery charger was turned on
Voltage 14.1 Amps 40 fast charge fan 2 lights
Unit ran for maybe 5 minutes then voltage dropped to .5 and amps to 00
Fan continues to run after failing at full speed 3 lights
Absorption light is on
Occasional flash from DC Low Voltage all other lights on & normal
Voltmeter tests at BC at time of failure
AC leads coming into unit 127V
DC output from BC 13.67
Restarted and immediately returned to 00V 00amps. All lights show normal restart Fan is on high (3 lights) Absorption light is on
After 4-5 minutes unit switched back to charging
14.1V 40 amps then after about 3-4 minutes returned to .5-.6V 00 amps. This continues to happen over a 1 hour period until BC is turned off.
Note: Voltage showing would be between 00V Ė 0.5V
Temperature readings using Raytech heat gun
Air Temp 87F
Upper Case 100-101F
Lower Case 96F
Fan on 2 of 3 lights before failure 3 of 3 lights when failed
Attempts to isolate problem
Reviewed You Tube trouble shooting video link provided by Adam - Sterling
Removed lower red cover and put dc fan on high (same failure)
Reset charger to Open Lead Acid (same failure)
Reset charger to BC mode (same failure)
Removed battery temp sense wire (same failure)
Honda 1000 set to full output mode (same failure)
Honda 1000 set to Eco mode (same failure)
Turned both solar panels
and wind generator
off (same failure)
When batteries get charged up by solar and wind and battery charger is started. If the battery charger output is < 33-34amps it will run thru its full cycle.
Any suggestions or comments on my problem?