Off Grid Power Solutions
Junson Conkey's recommended off grid power supplies
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GREAT WORK,you should use those wires for another battery bank and use 0
gauge shorter wire attached to the double copper pipe. also connect the
positive and negative to OPPOSITE sides of the battery bank. Do it right
the first time and have piece of mind.
You need a fuse on your positive cable. Just to be safe. If at the very
least put 2/0 or 3/0 cable from the batteries to the inverter so they dont
get too hot. 2 awg cable cant handle 300 amps with a 3k inverter. 45 amps
is a good charge rate but it will prolly take forever even on a partial
discharge. The IOTA DLS chargers can be run parallel with each other. For
example another 45 amp in parallel gives you 90 amp peak charging
amps…but requires a 30A circuit breaker on the AC end.
Nice battery bank thanks for the info
Merry Christmas Brother!
What a massive amp draw to run a 12v inverter system your sucking off so
much more current and taking the batteries down so fast. At 1500 watts your
pulling at least 128 amps off those under rated cabling. With a 48v
inverter at 1500 watts your pulling a nifty 32 amp load and your cables
would be over kill. With the batteries you have you could have two 400 amp
battery banks and you increase run time and lesson battery wear. Bearing in
mind the investment of the inverter and a few diodes and connectors. You
could still charge with your 12v battery charger if you add in some hefty
diodes and block the other batterys from seeing each other on the charger
side you would have a rock solid power supply with time to spare. Also shit
happens add in a circuit breaker or fuse off your battey connection to the
inverter so you don’t come home find you lost everything you own due to the
bettery bank catching fire.
Nice job on the battery bank, 1000 ah should keep the important things
running for more than a few days. Minus the heater that is.
Don’t forget to use a timer on the fridge, it can pull 800amps when defrost
kicks in. I found that out the hard way.
Thanks for the video series. I would suggest using casters with each
having the capacity of half of your finished project and a brake. Floors
are never perfect so you can reasonably expect that at any given time only
two of your castors will be supporting the weight. Well, I may be wrong
since wood flexes and the weight of the battery would stop any tilting.
I’m used to my tool box that has almost no flex and wobbles when on the
uneven shop floor. Thanks again.
Have you considered attaching your draw from the middle of the battery
bank? That would reduce the current running through the full bank before
reaching your inverter.
Is there a reason you are pulling that load from one end of the battery
bank instead of across it. Is ti because you want to draw from the flooded
I wonder if you could add another inverter from the same bank to lower the
consumption of amperage by just one inverter, if you tried please let me
know or if you ever try it out let is know how it goes, the reason is
because having two inverters I will probably get more A/C out put or even
240 be for heavy appliances. It’s great info here keep it up.
Have you figured the cost of a recharge, against the electricity cost to
power your house for a day. I wondered if it was viable or just to protect
against power outages with little or no difference either way cost wise.
Better would be to connect positive and negative oposite on the bank, , you
draw an equal amount of power out off each battery,you do not in your way,
batt system will work better, keep them the same as mutch as possible.
Thats my dream there. But im gonna use a bank of 14V XS Power batteries
each 2400 amps
Regarding the dual 4 gauge interconnects. I would like to caution against
doing this in general simply because there will really never be any dual
connections here at all. In real world practice it is nearly, if not
absolutely impossible to have two identical 4 gauge connections.
Say you have one 4 gauge that has 100 micro Ohm resistance and the other
has 400 micro Ohm. Both values are “nearly zero Ohm” (less then 1/1000th of
an Ohm) but the 2nd wire has 300% more resistance which means that the
first wire will carry 300% more current!
For this reason paralleled conductors are not recommended unless each
conductor is capable of safely carrying 100% of the load.
Just my 02, I am surely not trying to tell you anything my friend, I am
here to learn :)
Some of the best battery knowledge I’ve heard. Thank you.
hmmm, I did not know that…. Thanks for the lesson :)
Listen to MrBugsier5 and connect the invertor that way, also you want to
charge the battery bank the same way you drain it , most definitely NOT
from one battery …
I see a couple of possible issues with the setup. First the i battery
wiring. Pulling and charging on the same end the battery may cause the
batteries at the far end to weaken due to the resistance of the wire.
Secondly you have two different types of batteries each having different
type of charging requirements.
is it better to use a 12v generator to charge batteries and invert to 120v
than just have a 120v generator and run the house with it? and the excess
you charge the batteries with? would require less equipment and no 12v
did you just build that whole contraption when a 3kw generator and a can of
fuel would have done the same thing?
Do you have a autoswitching UPS style arrangement where the backup power
automatically kicks in without loosing power? if yes, why? do you have
power needs so important that a few minutes down time is not good enough?
i totally understand the hobby aspect, its fun therefore you do it and
with perfect cause
cool setup anyways, i like your vids :)
If you build another battery bank box , use ball bearing rollers instead of
standard wheel rollers. The advantage is they don’t need to pivot and
change direction to roll, they will roll in any direction from start to
It will roll easier and less force needed to change direction when
would this battery bank run 1800watts of lighting (hps) and can i charge
the battery bank with solar pv ? i love your enthusiasm
I enjoyed the series very much. Thank you for the instructional videos.
I usually like your vids….but, I was done with this when U mixed
batteries..u also needed to chuck the two weak telecom batts and run only
the 6 stronger ones…you would have gained a real nice bank..but adding
the weak ones and then mixing in two new and totally different
types….hmmm….bad example and just plain wrong…
OK, I’m sold on your ability to completely document a process, and you
apparently know your stuff about batteries. Thank you for your time in
production of this video series!
where is very nice trick to balance each battery, connect all in parallel,
and for positive use longest wire to positive contact on first battery,
and for negative use short wire for last battery. each battery will have
same resistance path to inverter. Problem ?