Hello Wrenches,
Do the relays that break the current from the direct grid tie
inverters, in AC coupled systems, need to be motor rated or can they
simply be rated for the amperage of the inverter output? How
inductive is the current between the two inverter systems? Will the
current tend to j
Hi Dan,
You mentioned that “his grounds didn't work”. Actually, they worked, just in an
undesirable way. One thing to look at is how or whether the house ground system
was bonded to the tower ground. If they were not properly bonded, and with poor
soil condition, the potential difference betwee
Since grid-tie inverters sell back with a power factor of 1, the load
~should~ be entirely resistive and
not inductive or capacitive so a appropriately rated relay contacts
~should~ be fine.
Except maybe if the inverter is designed to supply VARs like the last
Solar-Pro magazine talks about.
Dear Wrenches,
I am preparing to install a flush mount roof top solar PV system on a
friends home in North Central Massachusetts. The local building department
would like a stamped letter from a MA engineer certifying that the roof
structure can support the additional load of the PV system. I ha
Hi Drake,
I think you can put a power diode in parallel to the gt inverter that can
conduct that inductive current if you need to. However, I think BoB is
correct, there should just be induction of the wiring itself for most
grid-tied inverter. The relay engineer recommended this diode for a DC
Hello Larry,
A number of Wrenches have also contacted me off-list asking me to keep them
informed.
Clearly interest on this topic is high. To that point, I'll gladly post
findings and updates here when information becomes available.
In reference to "his grounds didn't work" .. perhaps I ought
Focus is on the relay contacts. Any good designer will have already
incorporated protective diodes for relay DC coils, so nothing needed unless
specifically stated in the instruction/installation manual.
Do NOT connect any diodes across the relay contacts.
Bob Gudgel is 100% on target with his
Does anyone know of an inverter/charger 48 volt dc input-240 volt ac output
rated 1,500 watts true sine? The only small output inverters I can find are
by Studer or Stecca but so far with European standard outputs.
Thanks
Philip N. Lawes
Insoltech Solar
License # 300328
172 wave St.
Laguna
Maybe a outback with a autotransformer
On Jun 16, 2014 12:28 PM, "Phil Lawes" wrote:
> Does anyone know of an inverter/charger 48 volt dc input-240 volt ac
> output rated 1,500 watts true sine? The only small output inverters I can
> find are by Studer or Stecca but so far with European standard
Phil,
I'm not aware of any.
Schneider XW4548 is rated 4500W
Schneider SW series is not yet offered in 48V
Magnum 48V is 4000W
Outback Radian is rated 8000W
Jerry's suggestion of an FX ith an X-240 may be your best bet. The
smaller 48V vers
FYI, I was going to get the sleeves, but they were special order and
required a special crimping tool. This project was in Mexico, so I
pulled the cable out and inspected it after it was torqued. I found
excellent compression, and no tearing of the strands. In my opinion,
the SMA connectors
All
We have had four Bergey 10K Turbines take a direct strike. Only one strike
killed all the equipment in the power room. That installer had connected the
ground wire inside the armored cable that is supplied by Bergey in the wiring
kit. The cable ground is not supposed to be connected and B
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