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Type: Posts; User: dwh

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  1. Replies
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    2,617

    I don't think non-combustible matters. I think...

    I don't think non-combustible matters. I think non-CONDUCTIVE is a whole lot more important. You aren't going to have a fire in the first place if the stuff doesn't short out. I don't worry about a...
  2. Replies
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    (You call THAT pedantic? Nah. Now THIS is...

    (You call THAT pedantic? Nah. Now THIS is pedantic!)


    http://www.filmflams.com/wp-content/uploads/2013/11/CrocodileDundee.jpg
  3. Thread: Das Bus

    by dwh
    Replies
    17
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    1,393

    Ya. Same like this, but with 3 series strings...

    Ya. Same like this, but with 3 series strings instead of 2:



    http://www.rialtainfo.com/vw/vw_images/engine_battery_001.gif
  4. Thread: Das Bus

    by dwh
    Replies
    17
    Views
    1,393

    It'd be 3 series strings of 2 x 6v in series, and...

    It'd be 3 series strings of 2 x 6v in series, and then the three strings paralleled for 12v.
  5. Replies
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    162

    The CTEK regulates current and voltage in the...

    The CTEK regulates current and voltage in the bulk stage, and voltage in the absorb and float stages. All proper multi-stage chargers do that - bulk stage in constant current mode, then absorb and...
  6. Replies
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    Just noticed you said your rig's constant voltage...

    Just noticed you said your rig's constant voltage power supply (voltage regulated alternator) puts out 13.3v.

    So, if the CTEK is putting out 20a @ 14.4v, that'd be 20a x 14.4v = 288w. On the input...
  7. Replies
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    Voltage drop doesn't much matter when CHARGING...

    Voltage drop doesn't much matter when CHARGING batteries, though it definitely matters when supplying loads from batteries, such as an inverter.

    Why does it not matter when charging? Because...
  8. Replies
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    http://www.expeditionportal.com/forum/threads/7750...

    http://www.expeditionportal.com/forum/threads/77503-How-to-make-a-cheap-isolated-dual-battery-setup-for-50

    With a deep cycle battery and hook the extra loads (except the winch and driving lights)...
  9. Replies
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    2,502

    99% of everything works just fine on Modified...

    99% of everything works just fine on Modified Square Wave. The things which don't...usually burn up. Quite a few "battery powered tool" chargers will toast on MSW.

    The ultimate small inverter...
  10. Replies
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    2,491

    Cab-top crawl-through? Never seen that before.

    Cab-top crawl-through? Never seen that before.
  11. Yea...at that point I guess it just becomes a...

    Yea...at that point I guess it just becomes a question of what is acceptable for the area and the number of tourists.
    ...
  12. Well...it's a lot for batteries and solar, but it...

    Well...it's a lot for batteries and solar, but it sure ain't much for a small generator (or decent alternator) and you could probably get by with running one full (usually 40 minute) cycle per day if...
  13. Well...for one thing, I think when it comes out...

    Well...for one thing, I think when it comes out of the "composting" toilet - it's usually in a plastic bag. So burying that is quite a bit different than burying the raw waste from a point of view of...
  14. Nope. Here's the explanation: ...

    Nope. Here's the explanation:

    http://www.smartgauge.co.uk/nosurge2.html
  15. Not exactly. It degrades the ability to charge...

    Not exactly. It degrades the ability to charge quickly, but has nothing to do with reaching full charge.

    Since voltage drop is a function of load, as the battery voltage rises, the amperage flow...
  16. Agree with Vortec. On average, most people...

    Agree with Vortec.

    On average, most people see maybe 10%-15% increase in watts harvested by using MPPT. Using MPPT for battery charging (different than feeding a grid-tie setup) the most benefit...
  17. Yes MPPT is better, but the general consensus...

    Yes MPPT is better, but the general consensus among solar engineers is that MPPT is generally not worth the extra cost for a solar rig of less than 200w size.

    (That is...REAL MPPT is not worth...
  18. Thread: 12V DC-DC Chargers

    by dwh
    Replies
    22
    Views
    1,948

    It'll work just fine. The only possible problem...

    It'll work just fine. The only possible problem is the output limit - it can charge at up to 30a for up to 30 minutes, then drops back to a max of 20a after that. Depending on the size of your aux...
  19. Thread: Self jump starting

    by dwh
    Replies
    9
    Views
    772

    x2 I jump through my 80a rated solenoid...

    x2

    I jump through my 80a rated solenoid without any problems. I had to install bigger wiring though - with the original battery cables, it wouldn't turn the 460. Clicky, clickety click.
    Bigger...
  20. Replies
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    If you didn't have a battery connected to load...

    If you didn't have a battery connected to load down the panels when you tested them, then 12v ain't nearly enough.

    A proper "12v nominal" solar setup should be capable of putting out at least 15v...
  21. Replies
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    I think I agree with your buddy on the...

    I think I agree with your buddy on the self-recovery. My dad was a core driller, and was always taking rigs like this:

    186210

    into places with no roads -and getting them stuck.

    They had a...
  22. Thread: Camper Wiring help

    by dwh
    Replies
    2
    Views
    673

    http://www.expeditionportal.com/forum/threads/7750...

    http://www.expeditionportal.com/forum/threads/77503-How-to-make-a-cheap-isolated-dual-battery-setup-for-50
    ...
  23. Replies
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    9,374

    Nice! I put a 302 into one of those for a buddy...

    Nice! I put a 302 into one of those for a buddy oh so many decades ago.


    What that van needs:
    ...
  24. Thread: Inverter Install

    by dwh
    Replies
    25
    Views
    2,916

    Got a what? (FYI: There IS NO "earth ground"...

    Got a what?

    (FYI: There IS NO "earth ground" on a vehicle unless it's plugged into a shore power that's earth grounded. Another FYI: Under no circumstances should any part of the vehicle or...
  25. Replies
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    32,777

    Well, it's obvious you aren't a musician! Bass...

    Well, it's obvious you aren't a musician! Bass players in particular are painfully aware that amps have (usually quite large) dimensions:

    185316


    :D :D :D

    (no that's not me - I play 4...
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