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  1. Replies
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    Oh. you'd need a lot more than that. Liithiums...

    Oh. you'd need a lot more than that. Liithiums need a different charge routine as well as circuitry for cell balancing. So, you'd also need some electronics between the battery and the alternator....
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    The prohibition against mixing batteries (age,...

    The prohibition against mixing batteries (age, type, size, make, model, brand, color, etc.) applies when the batteries are tied into a FULL TIME battery bank. When they are only tied during charging,...
  3. (Answered the rest in the reply to the PM you...

    (Answered the rest in the reply to the PM you sent me.)

    Sure, there are a ton of 12v cig lighter power adapters for laptops. I have a couple of netbooks - and HP Mini and and Acer Z03

    I've got...
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    We agree! :) Better than my Latin. :D ...

    We agree! :)




    Better than my Latin. :D

    (I applaud anyone who speaks more than one language fluently. I speak English well, and Spanish very badly and I'm only so-so with mathematics. In...
  5. I use them myself. But I don't baby them, and...

    I use them myself.

    But I don't baby them, and I don't carry double what I need. I use the crap out of them and replace them when they've hit the end of their life cycle curve. I buy half as much...
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    If you know exactly what the load will be on a...

    If you know exactly what the load will be on a circuit because that circuit is dedicated to a particular load (appliance) and nothing else, then you size the wire to supply that load and nothing...
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    No, the fuse protects the wire - whether or not...

    No, the fuse protects the wire - whether or not there are any appliances connected to the wire.

    If the appliance needs a fuse to protect it, it will have its own. You might have a 20a branch...
  8. Heh...okay guys. Lemme re-phrase that... All...

    Heh...okay guys. Lemme re-phrase that...

    All lead-acid batteries are crap, and if you actually use them, only last a few years. :)
  9. Thread: Tesla Powerwall

    by dwh
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    http://emp.lbl.gov/publications/tracking-sun-vii-h...

    http://emp.lbl.gov/publications/tracking-sun-vii-historical-summary-installed-price-photovoltaics-united-states-1998-20



    https://www.youtube.com/watch?v=hVhFBPWZrlA&feature=youtu.be
  10. Thread: Tesla Powerwall

    by dwh
    Replies
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    1,439

    Which utility company is that? I was unaware that...

    Which utility company is that? I was unaware that any were actually paying money out to customers.

    Most simply issue a credit to the account for any excess. Generally, this credit builds up for a...
  11. How many cycles at what depth of discharge? ...

    How many cycles at what depth of discharge?


    It's a bit like saying, "I've been playing guitar for 10 years."

    Well yea okay...but...did you practice for an hour twice a week - or 4 hours a day...
  12. I dunno about the East Penn rumor, but I bought...

    I dunno about the East Penn rumor, but I bought two batteries from O'reilly last year. They were made by Enersys.


    Note the part number - 31DCM:
    ...
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    Cons Forgetting to disconnect.

    Cons
    Forgetting to disconnect.
  14. Say it takes 1/5 of an amp*hour to start the...

    Say it takes 1/5 of an amp*hour to start the truck. Say you do it twice a day. So sure, you got 6,000 cycles out of it. Maybe even more than that.

    But at what DoD?

    I dunno, but I can make a...
  15. 10 years.... Possible, but unlikely. It's that...

    10 years....

    Possible, but unlikely. It's that "properly sized" caveat which drops sand in the gears.

    Most have published life cycle numbers of 1,000 cycles at 50% DoD. That's not 10 years -...
  16. A lead-acid battery is a lead-acid battery. They...

    A lead-acid battery is a lead-acid battery. They are all goofy chemistry experiments in a plastic box. They are all disposable commodity items.

    Interstate sells "Interstate" branded batteries...
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    Ahh. Good catch, I wasn't sure if I was...

    Ahh. Good catch, I wasn't sure if I was remembering that correctly, and it's been a few years since I looked at that manual.
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    Don Rowe has it for $110: ...

    Don Rowe has it for $110:

    http://www.donrowe.com/Samlex-ACR-160-Automatic-Charge-Isolator-p/acr-160.htm
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    Yea. The problem that you might run into though,...

    Yea. The problem that you might run into though, is that when voltage drops on either side, the ACR will disconnect the batteries. So if you put a heavy load on the aux battery - say a coffee pot or...
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    The CTEK doesn't charge the starting battery from...

    The CTEK doesn't charge the starting battery from the solar unless you have the SmartPass (if I recall correctly).


    The ACR will do it.

    The Blue Sea ACRs will tie the batteries when it senses...
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    Sure it's a reasonable comparison - those are the...

    Sure it's a reasonable comparison - those are the two smallest units available. And I've owned and worn out both. One is a great unit, the other is a piece of crap.





    I knew that.

    Which...
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    http://www.amazon.com/Bussmann-CBC-50HB-Circuit-Br...

    http://www.amazon.com/Bussmann-CBC-50HB-Circuit-Breaker/dp/B001PTBVL2/ref=pd_sbs_263_2/175-9180990-8176659?ie=UTF8&refRID=0D7AVVA8TBCPVQCS5FMF


    That's what I have between my aux battery and my...
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    Two. That fuse block also has a negative bus bar...

    Two. That fuse block also has a negative bus bar built-in. :)
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    I've got one. Don't bother. I wore out a...

    I've got one. Don't bother.

    I wore out a 1200w/1500w Champion, and replaced it around a year ago with the little HF 2-stroke. The Champ is 200 bucks at Amazon with free delivery. The HF 2-stroke...
  25. Ah. I wouldn't use aluminum. They used to use...

    Ah. I wouldn't use aluminum.

    They used to use it for branch circuits in houses in some areas. Had a few fires. The aluminum expands/contracts more when it heats/cools and the connections...
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