Yes it is. But since you have to install inverters based on the
manufacturer’s requirements, SMA’s instructions trump MidNite’s, IMHO.
Since MidNite and SMA worked jointly together to develop those E-Panels, I
can only assume that either it’s an oversight on both of their parts, or
that SMA is b
A 60 amp continuously rated AC breaker is what is actually being used in
the UL listed E Panel from Midnite.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 7/3/2014 9:01 PM, Brian Teitelbaum wrote:
Mac,
Be car
Based on many successful installs, I'd say a 3/4 HP pump is not a
problem at all, and that the Magnum could easily run a 1-1/2 HP
submersible pump.
2 HP probably, but that's where you start worrying.
The Franklin Subpak controller can be used on regular AC pumps and not
only offers constant pre
Yes Drake, I stand corrected, I was picturing the micro inverters feeding the
input rather than coupling the output of the Magnum. To your original question,
I think you would have to be consuming more power than the PV array alone can
provide before the Magnum voltage would drop with the pump l
Mac,
Be careful with breaker sizing here. The transfer switch in the SMA SI5048
is only rated for 56A at 120 VAC. From the SI manual:
“The maximum input current allowed on the Sunny Island is 56 A. Higher
input currents must not be connected to the Sunny Island.”
To protect that switch pro
We use a protective relay, unless using Sunny
Islands. In this case, the relay will be
controlled by the programmable AUX relay's12 V
signal. Magnum does have a phase shifting
function, but does not recommend relying on it.
At 04:40 PM 7/3/2014, you wrote:
Wrenches
I have not seen either a
Wrenches
I have not seen either a OB, Trace or Magnum do a even far job of charge
control or voltage limiting for the batteries during AC coupling as this is
when the transformer is basicly going backwards, it can and does but even
outback says you need to do a AC discounting means or AC or DC load
Hi Larry,
In this case, the Enphase will AC couple with the Magnum in the
protected loads panel. The AC out of the Magnum provides the micro
grid to which the Enphase connects. If charging exceeds loads, when
the grid is down, power will go to the batteries (up to the high
battery voltage se
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Hi Wrenches,
Jerry, I think you are correct, sma gear all around would be best. This
will be my recommendation but I am sensitive to this substantial cost.
Dave, if I add the second Sunny Island, I don't think I will be throttled
back because the transfer relays are rated for 60A. This should pa
Hi Wrenches,
Here is the only info I've seen regarding NEM with batteries in California.
It's a May 15 news post from CALSEIA, which Brad allowed me to post here.
One problem clearly is defining the categories, because what is a storage
system "larger than 10 kW"? Seems like there's an "h" fact
Mac, that Island interconnects with a max 70A 1P breaker (6.7kW
continuous), so unless they have a constant critical load draw or the
Fronius is massively oversized, you probably don't want to AC couple the
Fronius. The 5048 is also able to output a continuous 5000W only when
it's cooler than 7
Group
I might consider a third option SMA all the way, one additional island and
go with SMA on the output side of the now two islands, SMA seems to work
better with communication. I have a system someone else installed and there
they used an outback and did a DC coupled it works but it has issues
Hi Drake,
If the Enphase are online, up to 60 amps (30A @ 240V) can be transferred
through the Magnum inverter to loads. The inverter is not providing power to
loads at that time. If the Enphase go offline, the Magnum takes over using
power from the battery. If the load is greater than your Enp
Don't worry about over voltage, 220/127 is pretty common. Most utilities
run about 6% over voltage to allow for droop during high load and long
delivery lines. Inverters will not suffer the same issue so it is will be
fine.
Also, high load single phase equipment is generally 208/240V so they are
de
Hello wrenches,
I wanted to run this scenario by the forum. I have spoken with SMA about
this, but want some other opinions.
We were recently contracted by a fellow solar company to do some warranty
work for them out of town on a Sunny Island system that they had installed
about 5 years ago. It
Chris:
1.The house is at the end of a 200 foot feeder. The feeder is generous,
300 MCM, but depending on the use at the house, there will be some voltage
drop. At 205 the drop is 1.44%, not bad.
2.Your idea of increasing the voltage at the source is intriguing. Thank
you for that
Hello Bob,
We began selling FullRiver about 4 years ago and probably have over 200 systems
installed. We have had no failures or issues with them. One aspect I like is
the high acceptance voltage of 2.483 Vpc. Higher voltage means more power into
the battery so you are charging faster. The 2 vo
Hi Wrenches,
One of the things on my wish list is a integrated single phase integrated
visible break disconnect, meter socket, load center. The use case being
supply side connections for multiple single phase inverters. Does anybody
make such an animal?
Best regards,
--
Nathan Charles
Engineer
This information helps greatly. I really appreciate all of your expert advice.
One other wild card in the installation is that
the inverter is going to be AC coupled with an
Enphase system. The Enphase system will
contribute greatly to the overall power available
in the protected loads panel.
Here's your buck boost:
http://www.acmetransformerspro.com/acmebuckboosttransformers.htm
On Thu, Jul 3, 2014 at 2:33 AM, William Miller
wrote:
> Friends:
>
>
>
> About two months ago I inquired of this forum about complications that
> might result from running a residence on a 208 volt 3 phase
William,
If your voltage at the pump is 205 voltage at no load, it is not a cable
issue, your source of power is at too low a voltage. Voltage drop is
proportional to current, no current, no voltage drop.
Most 208V system are run at about 215v, to allow for some drop and to
facilitate 240v equipmen
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