Results 1 to 7 of 7

Thread: what voltage at crank

  1. #1
    Constant Bitrate
    Join Date
    Feb 2005
    Location
    Oklahoma
    Posts
    135

    what voltage at crank

    I am looking at using a inverter and it can go as low as 10.5 before going into "battery save" mode and shutting off. Is this low enough to survive crank? I searched for an idea of how low the voltage goes but was only able to find something in the FAQ section about minimum input being as low as possible for a PUS, no set number.

  2. #2
    Raw Wave wizardPC's Avatar
    Join Date
    Jun 2000
    Location
    Nashville
    Posts
    2,635
    depends on your vehicle and how healthy your battery is. I think the average is 10v.
    Debt as of 1/1/05: $34,354.48
    Debt as of July 4, 2007: $0.00 explanation
    I'M DEBT FREE!!
    I'm now a reasonably successful gunblogger.

  3. #3
    Variable Bitrate
    Join Date
    Dec 2003
    Location
    Surrey, BC, Canada
    Posts
    246
    depends on your car and the battery you have. There is no simple answer to your question. Just try it and find out.

  4. #4
    Variable Bitrate
    Join Date
    Dec 2003
    Location
    Surrey, BC, Canada
    Posts
    246
    dammit, I lose


  5. #5
    Newbie PCGUY112887's Avatar
    Join Date
    Oct 2004
    Location
    Illinois, Near St.Louis
    Posts
    37
    It seems to me that it would depend on the car?

    From what people are telling me it's just better to use a DC PSU... I had the same idea you did untill I found a cheaper DC PSU... for the cost of an inverter and normal PSU, it would equal or be more expensive than a ~$50 DC-DC PSU and shutdown controler... then you don't have to worry about cranking or anything.

  6. #6
    MySQL Error Scouse Monkey's Avatar
    Join Date
    Mar 2004
    Location
    Bristol
    Posts
    9,727
    Worst case about 8V. Typical with oldish battery etc 9-10V. Higher for a good big battery. Also depends if you ahve diesel. The glow plugs and then starting using compression drags the voltage down i believe.

  7. #7
    Constant Bitrate
    Join Date
    Feb 2005
    Location
    Oklahoma
    Posts
    135
    I have a 2004 WRX and new battery, I already have a spare PSU, I have looked at the DC PSUs but I have not found a 300w one yet and am pursuing this route, unless you guys have a link to a PSU that big.

Similar Threads

  1. Replies: 7
    Last Post: 01-14-2005, 11:56 AM
  2. What Gauge wires do I use?
    By Showmehow in forum Newbie
    Replies: 25
    Last Post: 07-25-2004, 11:41 AM
  3. Voltage issues with ITPS?
    By mcrussell in forum Power Supplies
    Replies: 1
    Last Post: 06-06-2004, 11:48 PM
  4. ITPS and Voltage drop issues
    By Wiredwrx in forum Power Supplies
    Replies: 7
    Last Post: 04-20-2004, 07:09 AM
  5. DC-DC psu and high capacity HDD
    By GrahamS in forum General Hardware Discussion
    Replies: 46
    Last Post: 12-19-1999, 06:44 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •