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Old 01-19-2015, 04:23 PM   #15
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my other questions is changing out the converter, everyone says it should be upgraded. What should I buy? I have 50 amp. Please send link if you have one.
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Old 01-19-2015, 05:00 PM   #16
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Factory solar charges in Use and Store, with a different(good) controller it is an excellent way of keeping your batteries charged if the AS is outside.
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Old 01-19-2015, 06:16 PM   #17
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I have thought about adding solar. We never boondock. We always camp in a campground with electric. I just want a small solar setup to charge the batteries.
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Old 01-19-2015, 07:26 PM   #18
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My AS has been stored for about three months I assume that my batteries are low or need charging. Does that mean that the brakes in my trailer won't work even when I plug the trailer into the tow vehicle? Do I take the batteries out and take them to a garage to be charged or should I buy a charger and if so what type of charger should I purchase? The trailer is stored on a storage lot with no electric availability. Thanks for any advice that you can give me!
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Old 01-19-2015, 08:02 PM   #19
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Ed, suggest you take them home and put them on a battery tender for several days. Ensure you buy a smart tender, 3 stage. They're not expensive, about 40-50 dollars. Check your water levels before charging. If the batteries are still in good shape they'll hold their voltage well during and after use.
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Old 01-19-2015, 08:14 PM   #20
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Ed,
Just pm you a while ago


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Old 01-20-2015, 10:29 AM   #21
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You Hear about all this magical battery chargers and all the different ideas,I never had any battery problems from over charging or under charging. My average battery life has been 6 years,I do check the water levels a couple times a year,you do not need to change your converter unless it goes bad I am really happy with the parralax with temp control which came in my new airstream, it does everything it is supposed to do.........
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Old 01-20-2015, 01:31 PM   #22
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I guess I should have taken a poll-
How many vote for staying on shore power all the time?
How many vote for smart charger?
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Old 01-20-2015, 01:50 PM   #23
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Al I can do is trust the electrically talented folks on the forums.

The collective wisdom (as I read it) from these people states:

-the parallax 7300 converter/charger that came stock in my AS will overcharge my batteries if allowed to charge them continually.

-the newer converters with multi-stage smart chargers will not overcharge my batteries. It's okay to run the charging circuit continually (i.e. okay to leave the battery isolator switch set to use for the long term).

-if you haven't upgraded the stock converter, multi-stage battery tenders are a safe, cheap, and simple way to charge the batteries continually during storage.
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Old 01-21-2015, 12:18 PM   #24
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My stock, factory parralax does fine, I charged the batteries up and disconnect the positive and they are good for maybe 1 month then I hook up a 1.5 amp maintainer over nite to top them off.ido check the water 2X a year and never had any battery problems....
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Old 01-21-2015, 02:28 PM   #25
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Wink

I love my 'magical' IOTA IQ4, before learning any better, our P-Lax 7455 burned four new Interstates, two on the dealers lot and two more on our home pad.

TETO...

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Old 05-29-2016, 01:32 PM   #26
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I just purchased two new Interstate batteries and installed them. My trailer has been stored for about one month. When I stored the trailer, I disconnected the negative cable connected to the batteries, I have had the switch in the trailer in the off/store position. I just went to the stored trailer and connected it to 110 shore power (only thing that is available). i reconnected the negative cable to the battery and turned the battery switch from storage mode to the On position. Now that the trailer is connected to shore power will it over charge my batteries if I leave the trailer hooked to shore power for a week to ten days? With nothing else on in the trailer will regular 110 current be enough to charge the batteries?
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Old 05-29-2016, 02:15 PM   #27
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Best answer is "That depends."

It depends on so many things, starting with the charge state of your batteries and how long it would take your existing converter to fully charge them up. My somewhat educated guess is that if your batteries were close to full, you had the stock Parallax converter, and and you left the trailer connected with the switch in the "USE" position for a week to 10 days, you would probably be overcharging your batteries for some portion of that time. Whether it would "boil" or otherwise damage them in that period of time, I can't really say for sure.

In a scenario where (1) the batteries are close to fully charged, (2) I don't want to swap out the stock converter right now for a smarter multi-stage unit and (3) I just want to make sure the batteries are fresh for my next trip, I would consider the following:

Attach a Battery Tender (maybe one of these from Amazon) to the batteries, plug that in, and relax. We've used the Battery Tender on our genny and even on our TV to keep the batteries in tip-top shape when we're not using the device, and it's given wonderful results. Cheap, effective, and worry-free.

(full disclosure: For Rocinante we replaced the stock Parallax single-stage converter with the Progressive Dynamics multi-stage unit so we could just plug in the trailer and never worry about the possibility of accidentally overcharging our batteries. There are plenty of threads about that should you wish to dig in and give that a go. )
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Old 05-29-2016, 05:02 PM   #28
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'BEST' is not really a relative term. If one is truly looking for the BEST way to charge and maintain a battery bank, then you only have ONE OPTION. Remember, the topic is seeking the 'BEST'.

There are several requirements that will provide the BEST solution:
• Full temperature compensation to regulate the charging voltage with respect to the measured temperature of the batteries
• Fully adjustable charging voltages that exactly match the requirements of the battery manufacturers
• Fully automatic 3 or 4 stage charging that takes the batteries thru the bulk, absorb and float stages
•Fully adjustable time in the absorption phase that is directly related to the size of your battery bank

There are only 2 ways to acquire all of the above requirements:
• use a fully programmable inverter/charger like a Magum, Victron or Outback
• use a fully programmable solar charge controller like a Blue Sky, Victron, Midnight Solar or Outback unit with your solar array.

Most other charging devices use pre-set charge programming which while adequate for many batteries, do not provide for the BEST method for charging lead based battery systems.


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