Gary, you might try an old-fashioned approach: bypass the controller to
send the array straight to the batteries until threshold voltage is
reached. More specifically, bypass one of the controllers; assuming 48,
60 or 72 Vnom depending on array. Let the other controller remain in
normal operati
I don't have that option, there isn't one available. I've been advised a
two person commercial grade gas driven auger will do it.
On Fri, Feb 9, 2018 at 11:56 PM, Darryl Thayer
wrote:
> The last job I used a mini excavator with auger drive head and put in
> ground screws worked great only troubl
Gary,
I keep 24v and 48 v IOTA chargers with jumper cables attached for those times
when systems are dead. Just a minute or so plugged into my Honda 2000I or
generator on bypass gets everything lit up and running.
Just did one yesterday. Got Kohler running but Mate 3 and inverter would not
If its an old pump, you don’t say then all sorts of bad things are possible as
parts wear out, all that.
And it could also be your inverter which is probably getting pretty old as
well. I’m starting to see the old SW’s fail and have all sorts of weird
problems.
my 2 cents.
jay
> On Feb 9,
That's probably what I would try also... but be really careful with Li,
there may be an issue with the BMS already, doing this could cause thermal
runaway... I would probably do so away from any structures, and I would be
using an thermal camera to monitor for hot spots.
I've done this with Li Po
Allan has a good approach as long as you are there to monitor it. The
wiring is already there, you just have jump the array positive to the
controller output. ( a little double lugging never hurt anyone?!!.)
Even higher voltage arrays with MPPT can be used this way. They will
just put o
Some of my non-solar consulting involves test engineering for lithium
ion materials development. I'm no expert but I do get to work with folks
developing and testing cells and sit in on industry training and
conferences now and then. I would discourage trying the jump start
described here witho
*Aloha Wrenches,*
*I thought I'd share my own experiences with the Powerwall as my company is
now launching a program to add PW to existing NEM systems since the vast
majority of them do not have storage which means that if the grid goes
down, so does their PV system. (With the exception of the
Tesla also promises an offgrid version soon that will be DC coupled. The
price is not bad for 13 KWH right now. The system is 50 vdc which to me is
usable as it stands. All of the 400vdc batteries are not conceived right
in my humble opinion! Not to mention for safety in my home!
Dave Angelini Of
Is there not a concern that if the batteries are showing such low voltage
that they will not accept current, and the voltage will rise to module
voltage and put array voltage on the output of the charge controller?
On Sat, Feb 10, 2018 at 12:24 PM, Ray wrote:
> Allan has a good approach as long
That's why Allan and I only recommend this if a knowledgeable tech is
there to monitor it. It should only take a few minutes to either see
the batteries are just not going to wake up, or for regular charging to
take over. This is basically CPR for the batteries. You don't ever do
it normall
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