maybe just 1 hr off, 23 hrs on.
The charger should set itself back to a trickle.
From: Arby bernt <arbybernt@yahoo.com>
To: "electricboats@yahoogroups.com" <electricboats@yahoogroups.com>
Sent: Tuesday, November 13, 2012 6:35:37 AM
Subject: Re: [Electric Boats] Battery Charger
Hi Steve,
Perhaps you could use a daily timer to power your charger. You'll need to experiment, but you might start out with 4 hours on, 18hrs off...
Arby
From: Steve Dolan <sdolan@scannersllc.com>
To: "electricboats@yahoogroups.com" <electricboats@yahoogroups.com>
Sent: Tuesday, November 13, 2012 6:14 AM
Subject: [Electric Boats] Battery Charger
This has to do with a Battery Charger stepping back in its charge routine.
For the last few years I have had a problem with the charger (BRUSA) not stepping back to its previous routine when it can't maintain charge under trickle or maintenance charge.
Most chargers are built for charging cars. Cars may have a load at park of 1 few milliamps to maintain the clock and memory loads.
With a larger boat, running a refrigerator and freezer while away from it may draw as much as 10A total every few hours alone. These are the only devices, other than the sumps of course, that are left running over the week when no one is aboard. The charger in trickle mode provides maybe 3A. In the warm summer months this may not be enough to maintain the 144V batteries, so this charger figures that there is something wrong and shuts down but won't go back to step 2. I can understand to a degree why this is for safety reasons and this is the reason from BRUSA who states that they had done this in the past but if a battery went bad in a string the charger may continue to run. I am at a loss as to how to solve the issue and thought I would ask if anyone else has run into this problem and had a solution. In the past I would just unplug the shore power for a few minutes and then plug it in restarting the charge routine.
Steve in Solomons MD
For the last few years I have had a problem with the charger (BRUSA) not stepping back to its previous routine when it can't maintain charge under trickle or maintenance charge.
Most chargers are built for charging cars. Cars may have a load at park of 1 few milliamps to maintain the clock and memory loads.
With a larger boat, running a refrigerator and freezer while away from it may draw as much as 10A total every few hours alone. These are the only devices, other than the sumps of course, that are left running over the week when no one is aboard. The charger in trickle mode provides maybe 3A. In the warm summer months this may not be enough to maintain the 144V batteries, so this charger figures that there is something wrong and shuts down but won't go back to step 2. I can understand to a degree why this is for safety reasons and this is the reason from BRUSA who states that they had done this in the past but if a battery went bad in a string the charger may continue to run. I am at a loss as to how to solve the issue and thought I would ask if anyone else has run into this problem and had a solution. In the past I would just unplug the shore power for a few minutes and then plug it in restarting the charge routine.
Steve in Solomons MD
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