Given the DC voltage sag I have to wonder how a bank of lithium batteries
would react as if I understand correctly they maintain the same voltage
through out their entire range of SOC.
Christopher
On Fri, Jul 26, 2019 at 1:19 PM Ray wrote:
> I've run a 3 Hp pump on a pair of VFX 3648s, but
I've run a 3 Hp pump on a pair of VFX 3648s, but then the 2nd issue was
DC voltage sag from the batteries. We had a string of Rolls 5000s that
could not keep the voltage high enough below 70% SOC. Be sure to have
plenty of battery behind this system. Also you might look into the soft
start
The CSW is for a small cabin. Anyone living offgrid with normal loads
should use an XW and they will not have to deal with any of this. It has
been that way since 2006.
On Thu, 25 Jul 2019 22:17:13 -0700, Jerry
Shafer wrote: Wrenches Some time back, (years) l did a off grid system
for a
Thanks Ray and Jerry,
Great to hear from you both with your years of combined experience :)
So yes looking at the 5 sec has me switching back to a trusty Radian -
even then from what you are saying it may not work.
And you are right Ray - Outback is careful to rate the "overload
Wrenches
Some time back, (years) l did a off grid system for a customer that was
building his home, he was milli g lumber from the home site, l quoted a
Outback PS-4 3648, the customer already had a very large battery bank 2000
amp hrs. at 48 DC nominal. Anyway he had a well on a 5 hp. freq drive
I only look at the 5 sec and 30 sec surge ratings to get an idea what an
inverter can really do in the real world. All those millisecond
ratings/ in rush current specs won't get a pump or motor started, and
will basically just get you into trouble. The reason they have those
ratings in amps
Hey There Wrenches,
So be advised that after a little research the SW dual stack will NOT
double the surge ratings of a single SW.
But that brings me to my second question:
What inverter surge rating should one refer to when looking at maximum
Inrush or LRA - 1ms? 100ms? 1 sec?
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