|
07-19-2006, 3:39 PM
|
Reply
|
I am discovering that the stock Alternator on my boat is not sufficient for my after market stereo and dual batteries. What have you all done to solve this problem? I am running 2 amps, total of 950 watts and my fues' total 80amps with dual blue top optima batts.... Thanks in advance.... E$
|
Join Date: Jun 2005
07-19-2006, 3:43 PM
|
Reply
|
With 950 total watts your stock alternator and two blue tops should be plenty. It sounds like you are not starting out with a full charge on your batteries. I am running a 140 amp alternator with 8 blue tops and a built in charger on my 01 SAN.
|
07-19-2006, 3:51 PM
|
Reply
|
I'm running, 1-500 watt 1 channel 1-300 watt 2 channel 1-200 watt four channel It's all stock but two batteries and it's working fine so far.
|
Join Date: May 2006
07-19-2006, 4:00 PM
|
Reply
|
how many amps is your stock alternator??? JJ
|
Join Date: Apr 2004
07-19-2006, 4:09 PM
|
Reply
|
That system should not be killing your batteries unless your playing for really long periods with the boat off. Buy a 3 stage charger and top off the batteries at night.
|
07-19-2006, 4:55 PM
|
Reply
|
Thank you all for the replies. I believe the stock ALt is only 40 maybe 60amps, I have an 01 SAN with the GT-40 by PCM. I put a volt meter on my batt cables and its only hitting 12.95 with a good amount of throttle. SO I think its just slowly fading out cause it can not keep up even with the motor on with the amount of amps my stereo is pulling. I am looking to see what my options are in getting closer to 100amps in a marine application for a ford motor, I think that should be sufficient for my set up dont you all think???
|
07-19-2006, 4:57 PM
|
Reply
|
Oh, and I had to ask what CAR is running off of 8 BLUE TOPS!!! That also must help to throw a FATTY WAKE behind your Super!!!
|
Join Date: Jun 2005
07-19-2006, 5:01 PM
|
Reply
|
I am having a similar problem but its more related to ballast pumps. Running 4-5 pumps at a time results in a significant drop on the voltmeter. Can anyone give me a link and estimate on a high output alternator for a 2000 malibu wakesetter with the monsoon motor? Thanks.
|
07-19-2006, 5:25 PM
|
Reply
|
KG, Thanks for the reply, I have a 3 stage but as i mentioned above my actual alt is only throwing 12.95v out with a load on the motor, so even if I top mine off before I head out I have the possibility of not being able to keep them charged. Prob sounds like I am answering my own question, but I am really curious as to the options out there with after market alt for my GT-40 motor...
|
Join Date: Apr 2005
07-19-2006, 6:39 PM
|
Reply
|
I took my stock 70amp alternator and had it rebuilt to 130amp for about $200. I have six blue tops (five for stereo and one for ignition) and it will bring the batteries up from 11.0 to the high 12's while wakeboarding in between drinking sessions.
|
Join Date: Aug 2003
07-19-2006, 8:55 PM
|
Reply
|
My system is just south of 2500 watts, no lights (except LEDs), 100 amp alternator, two golf cart batteries, works for me. Here is a little Excel spreadsheet that can calculate your needs, it calcs pretty close to reality for my boat: Download it and open it in Excel then just fill in the blanks as shown.
|
Join Date: May 2004
07-20-2006, 6:31 AM
|
Reply
|
my system is close to the size of mikeski, but with the addition of 3 towre lights, same battereis, same size alt. The key for me is keeping my battereies fully charged when not in use. When I run my stereo (high volume) and lights my alt cannot keep up. But that is for short durations only.
|
Join Date: Jun 2005
07-20-2006, 8:36 AM
|
Reply
|
E Money- I am running 5200 watts of orion amps,2-12w7's,10 speakers on the tower and four in the hull. Seven batteries are for the stereo and one for the engine.
|
Join Date: Jun 2003
07-20-2006, 8:53 AM
|
Reply
|
Does anyone think 12.95 Volts from the alternator is a bit low?? I am thinking you should be seeing 14 volts +/- 0.5 volts from your alternator.
|
Join Date: May 2004
07-20-2006, 9:11 AM
|
Reply
|
yes, it's a little on the low side, but unless your seeing that on a voltmeter, it's proabbly not accurate. My dash voltmeter will read 13.3 or so and with the instrument it's reading 14.2-14.5. Also, as the amp draw increases the voltage will drop. typical 100 amps alternators under full load will throw around 13.3-13.5 volts, usually only at full charge will you see the full 14.2-14.5
|
Join Date: Apr 2006
07-20-2006, 9:39 AM
|
Reply
|
So how do you calculate wattage for saying how big your stereo is? Example. I have two 10 subs rated at 375W max. I have two wetsound pro 80s at 225W RMS. I have four cabin speakers at 45W. Ampwise, I have a 600x2 and 450x4 Rockford Fosgates. I'm just trying to figure out how much wattage I have
|
Join Date: May 2004
07-20-2006, 9:59 AM
|
Reply
|
the total RMS wattage that your amplifiers produce.
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is On
|
|
|
All times are GMT -7. The time now is 9:09 PM.
|
|