Some things I learned about surge protectors: The charger is very slow and
gentle, and usually charges in the low 13v range. I suppose this is to
increase battery life. Therefore, the battery will probably not deliver its
rated AH. The battery is most likely an LC type, not gel. That's a good
Lead calcium & gel are not mutually exclusive terms; one refers to
plate alloy & the other refers to the electrolyte. LC gel batteries
As the OP confirmed, he has AGM, not gel, batteries. That's probably
a good thing.
I have just ordered a battery isolator/switch for two batteries, it
has four positions: off, Battery 1, Both, Battery 2. I will report
when I create my backup solution. After I am done with it, I will go
back to repairing my diesel generator. It is very nice to have two
Tom, I understand that if I directly connect two batteries in a very
different state of charge, the current may be very high. But what if I
hypothetically connect two well charged batteries directly? Then I
guess that is safe, right?
I once had the same idea about using a car battery on an APC brand UPS unit
for camping and extended power outages. But I found that it used 4 gel
batteries hooked up in a series/ parallel scheme so that the battery output
internally to the UPS is 24VDC. This would require 2 car batteries wired in
series which is not feasible for me.
Also there is no external cutoff switch for that blasted warning beeper.
Correct. The lowest charge battery will always try to bring itself up
to the level of the highest charged, until they reach equilibrium.
There are ways to prevent this such as the large diode Battery
Isolators found on most motor homes and such, but if simply hooked
together, the inrush current can be damned high.
"The French are a smallish, monkey-looking bunch and not dressed any better,
on average, than the citizens of Baltimore.
True, you can sit outside in Paris and drink little cups of coffee,
but why this is more stylish than
sitting inside and drinking large glasses of whiskey I don't know."
-- P.J O'Rourke (1989)
Jesus, Tim, you're replying before I can see my post on my own news
WRT E=IR, I agree. But, it's beyond my capabilities to determine the
charge discharge characteristics of an AGM battery/flooded acid
battery/NiCad using only E=IR and a pad of paper, so I look at the
manufacturers spec sheets instead. Hopefully, their engineers confirm
their results empirically after they calculate them. I trust empirical
results more than theoretical. Of course, I'm a technician, not an
engineer, so that might have something to do with it. Also, sometimes
I forget to carry the one. <g>
The battery bank is actually fed with more electricity from the truck
alternator, at the time when it is loaded.
I was planning to connect the UPS, via its battery or separately, to
the battery posts of my truck and let it idle. I have a heavy duty
alternator, and I calculated that it will produce enough amps to
support the hypothetical expected load, with the batteried handling
That is a very heavy sucker. Even without batteries it must be very
difficult to lift. I handled a few 3.1 KVA units.
I like it too.
I would just rotate which batteries are getting charged.
Actually Ernie, V = IR also works for AC circuits. Replace "R" with
"Z" (meaning "impedance"). Thus V = IZ is valid for alternating
signals (as the notation that physicists use, rather than E=IZ).
For common resistors, Z = R, thus no modifications are needed for AC
circuits involving only resistive elements.
(in other words, the impedance need only be modified to account for
the inclusion of inductors and capacitors in the circuit. Further,
most circuits can be modelled as a combination of these 3 elements).
Perhaps someone will refer Ernie for instruction on the English
That's probably why Tim kill-filed you, Ernie. He's a _very_ patient
sort of fellow, especially when dealing with trolls.
Charles Scripter * email@example.com www.infinetivity.com/~cescript
When encryption is outlawed, bayl bhgynjf jvyy unir rapelcgvba.
Is it possible you are comparing "watts per hour" which would be like the
number on a light bulb "95 watts per hour" versus "watts total storage".
A 300 watt system would have a 300 watt inverter.
However, it might be connected to a 1,000 VA battery.
I've only posted once in this thread to ask everyone to ignore him.
His tactic is to commit threadjackings by making them about him and
his ideas on God regardless of what the topic was initally.
Look at the bright side of it, I assume that you are reading from
somewhere besides misc.survivalism So, he only messed up one thread
in your ng. In misc.survivalism, he does it to almost every thread
and it's feels like its been going on forever.
This is my last reply in this thread regarding ernie. Reply if you
like, but I'm about to filter the thread. Once ernie threadjacks
them, they are no longer worth following.
I'll only comment on this once.
Regardless of WHAT group it is on, it is just as unacceptable for
those who have no religeous beliefs, or anti Christian beliefs to
spout their claptrap as it is for those who do have a belief system to
in any way mention theirs.
Christianity is not a religion - it is a way of life - and it will
ALWAYS be evident in one way or another in a Christian's life.
Just the same, non belief, or heathenism, or whatever is a way of
life. It also will be evident in one way or another in the life of
those who follow this lifestyle.
What's good for the goose is good for the gander.
Your lifestyle includes off colour jokes, cussing, denying the
existance of a supreme being, or whatever? Fine. Keep it off these
newsgroups. No more a place for YOUR beliefs than his.
If you are not willing to censor your own posts, please do not censor
the posts of others.
He's also a troll in misc.rural and alt.energy.homepower, and I've learned
from first-hand experience that while he might seem like he can be
reasoned with, it's just a ploy to waste more of your time.
(Don't bother replying, erniegalts, you're in the new program's killfile
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