Monday, November 20, 2017

Rework

Day 26


Reworking Scampy's 
Tongue Weldments

6:56am:
We are here early at High Desert Metal Works, which opens at 7am. We are hoping that owner, Vince, gets on our job first thing.

You may recall that I erred in the placement of the weldments that secure our propane tanks and house battery. When our propane tank cover arrived, it would not fit properly because there was not enough room between Scampy's front end and the propane tanks.

High Desert is going to move the weldments to make that room.

Owner Vince watching our installation


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10:29am:
Two battery Scampy
Now that the correction of the weldment placement is complete, we are able to get on with hooking up the 2nd battery. This battery is the one that I Blogged to you about before.

We were warned by many Commenters, not to connect two batteries batteries of different capacities. We are connecting in paralell:
 Interstate Deep Cycle Battery with a 96 amp-hour rating
 Mighty Max Deep Cycle Battery with a 35 amp-hour rating

Doing research about this hook up, we found that any negative result of this hook-up is negligible.


5:23pm:
All hooked up!
The Scampy Team spent the afternoon in the nearby AutoZone parking lot. We went to AutoZone in order to buy the ring connectors for hooking up the cables. And remained in that lot doing all the hooking up.

One new cable connects the Rover Solar Charge Controller to our Interstate Deep Cycle Battery. The Interstate is the battery that was formerly mounted on Scampy's tongue. It's new location is in Tránsito's rear storage area.

The same connecting point on the solar charge controller for the Interstate is the connecting point for the Mighty Max Deep Cycle Battery. The two batteries are now hooked up in parallel and deliver their electric power to Scampy's 12 volt electric panel.


5:39pm:
Acid Test
We are using this opportunity, to find out if this new electric power configuration will deliver sufficient DC power to last all the way thru to tomorrow morning without the batteries going into a low voltage situation.

We will have all of Scampy's interior lighting on, until we go beddy-bye. Even our "Porch Light!" will be on. All nite too!

We will charge our Mac computer, iPhone, and anything else that needs charging as well.

We will not take it easy for this test. This definitely will be an acid-test!




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15 comments:

  1. I think what you misinterpreted when I posted before about odd size batteries
    Nothing physical will happen it's only electrical
    You're 35 amp hour battery will charge first, before your 96 amp hour battery The problem lies you're 96 amp battery may not charge to it's full potential
    But if you check it ( each individually )with your multimeter during the day as both batteries are being charged you'll see the difference in the readings between two batteries this is what most everybody was talking about

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    Replies
    1. If you do that check
      Turn the battery charger off and wait 15 minutes to check your reading

      Delete
    2. Ed,

      Let us assume that every thing you predict will happen with my present unbalanced configuration, does happen.

      My research told me, that the result will be so negligible, to be of little concern.

      George

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      Delete
  2. Replies
    1. Ed,

      I just made a Blog post about giving this new electric power configuration an acid test.

      George

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      Delete
    2. Ed,

      It appears as though you are correct! The two battery configuration failed the acid test.

      After the acid test failed, I changed the configuration to one battery. The larger, Interstate battery.

      I tested this one battery configuration by having everything inside Scampy turned on. Then running water in order to activate the water pump. This puts the heaviest load possible on Scampy's electrical system.

      If the system passed this test, our Samlex inverter would keep running. The Samlex gave a low power signal! The system did NOT pass the test!

      George



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      Delete
  3. George, I'm no expert but I think what may have occurred could be two-fold: 1) The smaller battery might get fully charged first. The charging controller could see this full charge voltage and cut back the charging current leaving the larger battery only partially charged. 2) Even if both were fully charged, the larger battery could be draining faster because it might be keeping the smaller one charged by either being the only one providing current for use or giving some to the smaller one until the voltages equalized. Now you have the equivalent of 2 smaller batteries.

    I suspect the 1st possibility played into the failure the most. It sounds like you have a relatively small draw even with all lights on & charging everything. I would not expect the 35 ah battery to last but the 96 ah battery, if fully charged, should have.

    You probably should get some 12 volt chargers for your phone & computer instead of using the inverter. You are probably loosing 10-15% to the inverter fan and inverter loss.

    Also, don't forget that the inverter shuts off at a certain voltage level, not amp hours left. Since batteries shouldn't be drained past 50% of ah capacity it is likely the equivalent voltage cutoff level is higher than that. And, since battery voltage drops when being used, the inverter is seeing that dropped voltage as what it is testing against. My experience with 220 ah of battery bank and a 2000 watt Samlex is that even with a fully charged battery bank the Samlex cuts off in seconds if the actual draw is enough. My Samlex has enough capability to run my microwave but my battery bank doesn't support that high of a draw without the voltage dropping below the cutoff point.

    ReplyDelete
    Replies
    1. Hi Tom,

      Please read today's Blog post to understand about how the batteries are now being used. Also, about the electrical system's configuration.

      I understand that my Samlex inverter shuts down when voltage descends below a certain level. But thanks for mentioning.

      George

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      Delete
  4. This part is not related to battery but an online scam you might want to be wary of this is a re-repost from the gypsy journal blog
    On another note, I got an email yesterday from some folks who are trying to sell their motorhome, saying that they received a call from some outfit that claimed they were an online dealership and wanting them to list their RV, saying that they could sell it within 30 days. He told them he has lots of buyers available, because he can offer 3.24% financing. But the catch was, he expects them to pay him $200 up front. They were understandably leery about that and asked what I thought.

    I replied that they should make a counteroffer, offering to pay him $500 when the RV sells in the 30 days he claims he can move it in. After all, if he’s so sure of himself, what does he have to lose? There are all kinds of con artists out there making all kinds of claims, and all they really care about is separating you from your money. These clowns simply want $200 up front to list an RV on their website.

    I am an administrator on the Living the RV Dream Sales & Swap Facebook group, and you can list your RV there for free, as well as a lot of other places online. Or, you can pay a little bit and put an ad in RV Trader. Or, just send me 200 bucks. I’ll mention your RV to a guy I know whose brother-in-law’s uncle’s next door neighbor works with a guy who said he might be in the market one of these days. Either way, the results will be the same as the “guaranteed” 30 day sale.

    ReplyDelete
    Replies
    1. Ed,

      Thank you for sharing the Gypsy Journal scam story.

      I often run into scams on the internet. I ran into one just a couple of days ago.

      While I was attempting get some info on my iPhone, I was looking at websites that I found from a Google search. I came across one site that offered to have an expert answer my question.

      The hook was, that an expert from Apple Computer would answer my question. A nominal $5 charge was requested, and I, like a fool, went for it.

      But these schemers were greedy. In less than a minute, they claimed that my $5 credit card payment was declined. Would I please make the $5 payment again, using a different credit card!!!!!!

      Now, the light dawned on my gullible brain! I phoned BanKAmericard to report this fraud.

      Interesting note: About the same time, BankAmercard had sent an email advising of suspicious activity on my card!
      Boy-O-Boy! BankAmericard is really on-the-job!

      George


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  5. Something doesn't sound right please clarify When you say you're doing an acid test, are you using a battery acid hydrometer or a multimeter to do your test ??
    As you're aware the Hydro meter is used to test the individual cells of a battery, specifically to find a dead cell but only batteries that have access Caps
    If it is a closed battery you do a load test
    If you have more than one battery a multimeter would tell you if you are balanced ( that is what you're aiming for )The lowest metered numbered battery will be the culprit

    ReplyDelete
    Replies
    1. Ed,

      From Google search:
      "Define: Acid test"

      ac·id test

      noun
      a conclusive test of the success or value of something.
      "the pact with the rebels is an acid test of the government's sincerity"

      George

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    2. Are you sure you want to stick with that answer

      Acid Tests - Wikipedia

      The Acid Tests were a series of parties held by author Ken Kesey in the San Francisco Bay Area during the mid-1960s, centered entirely on the use of, and advocacy of, the psychedelic drug LSD, also known as "acid".

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    3. Are you having a party and you didn't invite us your loyal followers and friends

      Delete
  6. This comment has been removed by the author.

    ReplyDelete