Electrical power out, batteries drained...Intelli-power?

JediJD

Active Member
TECHNICAL Contributor
Feb 14, 2009
1,361
Cartersville, GA
Boat Info
'07 42SS Carver, full electronics array
'03 380DA, RL80C+, ST7001, Kohl 7.3,4kw o/array sold
Engines
8.1S Crusader express drives
We have an Intelli-power PD2040, with five batteries...all lead-acid and all about a year old. Haven't had any charging, starting or electrical problems with either shore power, generator, or alternators.

Last night, coming in from some terrific mudslides courtesy of Cpt. Chapman, both CO detectors were going off. Being perhaps a bit off my game, I not only didn't remember the posts about the detectors being an early warning system about electrical power...(nor did reading it on the cover penetrate). I disconnected the CO monitors, borrowed a portable marine unit as a spare, and proceeded to a sound sleep. Needless to say, awoke this morning with some starboard voltage (about 11v) and 6v on the port engines. The port engine solenoid will not engage. Shore power is on, connections to the boat from shore power are solid. Batteries are full of water. With the generator on, it doesn't appear that anything is charging. No lights are on my Intellipower PD2040. Earlier in the day, I had washed down the bilge, and I pulled the Smartcraft monitor out to replace the dash about ten days ago, but otherwise, there has been nothing that would affect the power system.

My operating assumption is that either 1) a fuse has blown behind one of the panels (and I'm going after that assumption first by pulling the plastic panels and looking) and 2) the Intellipower unit went south (I'll of course first check to see that there is power going to it). 3) I'll also reconnect the Smartcraft SC500 but I can't imagine that is related. Any thoughts?
 
Update. Batteries 3 and 4 have about .5 volts. I believe these are the port batteries. The other three batteries each have 12.5 volts +\-. The Port solenoid is off. The Intellipower has voltage at the first two spade connectors. Nothing at the third and fourth. There are no lights or gauge movement of any type on the Intellipower.
 
I hope you didn't have the headache I did this morning - Turtletone's recipe for mudslides!

As a matter of fact, I do. I regret to say that my disposition is none the better for it today, although Becky and I enjoyed the immensely last night.
 
OK...with batteries on the boat completely dead, I went down with a multimeter and started doing some checking...

I only show 30vac going into the hot terminal of the Intellipower (I ordered a new one anyway)...which doesn't seem to make any sense at all. I would have thought I would have nothing, or 120vac. The good news is that with completely dead batteries, and shutting off shore power, I can replace electrical items myself without any significant fear of electrocuting myself.
 
Let's check both sides of the AC Converter CB and see what the VAC readings are there...I'm available today if you want an extra pair of hands...
 
Pretty much one of the damndest things I've run into nautically. Went to the boat yesterday, and everything working like a top. Batteries fine, charger working, everything acting like nothing ever flippin' happened. Note that prior to this, I had confirmed 120vac at the panel and a couple of maintenance amps being used, but NOTHING at the batteries or distribution terminals and I didn't do a thing except start pulling things apart and checking terminals.

Went back yesterday...lights great, batteries taking about 25 amps charging up...WTF? Doesn't bother me that I had the new charger shipped overnight either...

I'm not sure if there was a corroded connector somewhere, or an intermittent fault in the shore power connection at one of the breakers, or if he angel Moroni touched the boat and I really should be looking for a star in the East (I know, mixed metaphysical metaphor foul...fifteen Hail Mary's and loss of down).
 
.....or..... the whole episode was just a figment created by Turtle's Mud slide imagination maker.....I would understand....I've had Mike's mud slides...
 
I second the motion that alcohol impairment is likely the root cause of the problem. Secondary contributor could be excessive solar activity!
 

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