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Grit dog

Black Diamond, WA

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Posted: 02/18/21 12:02am Link  |  Quote  |  Print  |  Notify Moderator

rockcandymountain wrote:

All of you guys ROCK!! I am gonna wait til I get down to Phx in March before I tackle this but it is already printed out and in my travel notebook and I will let all know how it went!


?? You’re against making repairs before a trip?
Aren’t we just talking about 5minutes to determine if the batteries are getting charged and then possibly a simple battery replacement?


"Yes Sir, Oct 10 1888, Those poor school children froze to death in their tracks. They did not even find them until Spring. Especially hard hit were the ones who had to trek uphill to school both ways, with no shoes." -Bert A.

Grit dog

Black Diamond, WA

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Posted: 02/18/21 12:08am Link  |  Quote  |  Print  |  Notify Moderator

pianotuna wrote:

rockcandymountain,

You may wish to consider SiO2 batteries as their discharge rates are pretty astounding. They would cost more.

Or a pair of 6V SLA batteries that will give similar performance for 1/3 the price of Si02s.

And OP, you make it sound like only your self leveling feature is throwing the low voltage alarm. Granted it pulls a lot of amps for a short period of time, but if the batteries were toast or not getting charged, other DC loads would suffer too.
Do you ah e issues with other battery loads?

pianotuna

Regina, SK, Canada

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Posted: 02/18/21 02:50pm Link  |  Quote  |  Print  |  Notify Moderator

Grit Dog

Golf cart batteries are great--until you try to run a microwave via a 2000 watt inverter. Then you find out they had better be about 80% full or the inverter may shut down.


Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp hours of AGM in two battery banks 12 volt batteries, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.

Grit dog

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Posted: 02/18/21 03:40pm Link  |  Quote  |  Print  |  Notify Moderator

pianotuna wrote:

Grit Dog

Golf cart batteries are great--until you try to run a microwave via a 2000 watt inverter. Then you find out they had better be about 80% full or the inverter may shut down.


And the OP asked about using his leveling jacks.
Idk of alot of people that have $50k 5th wheels and live solely off of an inverter. You can't really "use" a big camper's amenities off of a little inverter.
And the OP doesn't even know how to check a battery, so doubt he's got a mac daddy electrical system hooked up.
Although, with a rig that size, for roughly the cost of 2 SIO2 100ah batteries, he could have a 6 to 8 battery bank of 6V FLA or SLA batteries that would make a whole costco size case of Hot pockets in the microwave, as fast as he could eat them if that was his jam. And still blow dry his hair and make coffee the next morning without even charging up.

philh

Belleville MI

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Posted: 02/21/21 11:40am Link  |  Quote  |  Print  |  Notify Moderator

Grit dog wrote:

pianotuna wrote:

Grit Dog

Golf cart batteries are great--until you try to run a microwave via a 2000 watt inverter. Then you find out they had better be about 80% full or the inverter may shut down.


And the OP asked about using his leveling jacks.
Idk of alot of people that have $50k 5th wheels and live solely off of an inverter. You can't really "use" a big camper's amenities off of a little inverter.
And the OP doesn't even know how to check a battery, so doubt he's got a mac daddy electrical system hooked up.
Although, with a rig that size, for roughly the cost of 2 SIO2 100ah batteries, he could have a 6 to 8 battery bank of 6V FLA or SLA batteries that would make a whole costco size case of Hot pockets in the microwave, as fast as he could eat them if that was his jam. And still blow dry his hair and make coffee the next morning without even charging up.

But wouldn't a pair of 12V batteries do better cooking a costco size box of hot pockets?

pianotuna

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Posted: 02/21/21 02:19pm Link  |  Quote  |  Print  |  Notify Moderator

philh wrote:


But wouldn't a pair of 12V batteries do better cooking a costco size box of hot pockets?


Flooded batteries are "rated" at a 25 amp draw @ 25 C (77 f)

So 4 pairs would give a continuous output of 100 amps, with 450 amp-hours of reserve (8 jars)

That may run a microwave for a time, and many folks have done so, when the wire is big enough and the bank is close enough to the inverter.

8 pairs would be 200 amps, with 900 amp-hours of reserve. (16 jars)

That would run the microwave for a long long time.

1 SiO2 can do 342 amps and a pair can do 684 amps, with 200 amp-hours of reserve.

So IF you go by rated capacity, the pair of SiO2, in THEORY ought to be a bit better than 4 pair of golf cart jars, as a single SiO2 can run a microwave at 20% state of charge. I would imagine that with twin SiO2 the microwave would run at 10% state of charge.

It boils down to which is cheaper per amp-hour and how much weight one can carry.

* This post was edited 02/21/21 02:29pm by pianotuna *

Grit dog

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Posted: 02/21/21 10:31pm Link  |  Quote  |  Print  |  Notify Moderator

From what I read, I don’t understand your claims aside from a lower useable DoD, about 30% vs 50 % compared to lead acid. And slightly more overall capacity.
And of course life cycles.
But you’re twisting the numbers/descriptions like most adverts for SIO2 batteries.
You’re basically claiming 4x as much useable power comparatively, or actually 2x as much because you’re comparing 6v to 12v.
But the difference is on the order of about 20% better with many more lifecycles. From what I can observe.

And the OP hasn’t even come back, which is good since this thread de railed upon your suggestion.

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