Thanks for the feedback and pointers, its greatly appreciated – I checked
frequency and it was spot on at 60Hz but with minimal decimal places on my
meter.
This must be something new with Magnum as I haven’t seen the voltage issues on
other systems nor have I had any issues with appliances or
Hi Jason,
In the IQ Planning Guide, the reference to calculating the OCPD at 1.25 x the
inverter continuous output current rating was in reference to sizing larger
OCPDs for the Enphase Q Aggregators (branch aggregators.) I did not intend to
imply that smaller circuits should be installed on
Hi Rich,
This appears to be a newer thing with magnum. I’ve seen this and it’s been
commented previously here on the wrenches. Doesn’t appear to be load or charge
related.
It’s definitely not on the older models.
Magnum says that this voltage fluctuation is normal operation.
Jay
Peltz
This is the main problem with a battery that relies on the electronics
inside to function. You have added another failure mode to a very basic and
reliable battery. The manufacturer has to be in business for us to spend 3+
times the price on LA for LFP to make sense.
On Mon, 1 Apr 2019
Rich, this is a known flaw in the Magnum AE and PAE series. I have one longtime
client for whom I supplied a 4448AE around 2009 who later told me that had he
known of this frequency issue he wouldn’t have selected Magnum.
Allan Sindelar
> On Apr 1, 2019, at 6:56 AM, Christopher Warfel
>
I would think it has to be frequency. What else could shift the time?
Up until about 2 years ago we were a grid isolated system and no one
could use a plug in the wall clock. It takes just a very little off 60
Hz for a clock to keep incorrect time. Being off .5 Hz will result in
42,300 cycles
Hello Wrenches
I have a site with two PAE 48v Magnum inverters stacked. System voltage
fluctuates ~ +/- 4 volts ranging from 243 to 247. Evenly split on the two lines.
Site has a few electrical peculiarities I haven’t seen on the many other sites
I have with Magnum inverters. Among those is
Somewhat unrelated is the confusion about AC branch circuit OCPD in an
Enphase IQ system. My understanding was that each branch circuit could be
protected by a 20A breaker, but I always designed it for minimum branch
circuit OCPD at 1.25 x combined inverter output circuit rating. The
Original IQ
I just replaced a 48V Lithionics battery with a 51V and I saw on their spec
sheet that they do 12V and 24V as well. It seems like a very solid battery
and BMS, but I have limited information on longevity.
DC Coupled, but solar is disabled at this time.
I haven't been back to the site, but I plan to test each inverter
individually with the other three chargers disabled to see if there is one
offender.
On Sat, Mar 30, 2019 at 3:47 PM Kienan Maxfield
wrote:
> Jason,
>
> This isn’t an AC
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