I have an off-grid customer who is having problems with his 10 year+ old
1/2hp well pump. It is running and running at 900watts constant and hardly
building pressure and even caused the 250amp breaker on his single VFX3524
inverter to trip. He is running the pump at 240V off a x240 transformer
an
Hey Amos.
It could be a multitude of things depending on what type of
pump motor it uses. Even if you get it fixed it’s still got 10yr parts in it
elsewhere that will have to probably be replaced soon too. Have you looked into
the Grundfos SQF series? They are really nice, run o
The Inverters do not know what the wattage will be until they attempt to connect(go into GRID Monitoring routine) and then evaluate the conditions.If the PV voltage is over the Start voltage they will act on this.If by just entering the GRID-Monitoring the PV voltage collapses(not enough minimum po
The wording in 690.12 B(2) , effective after Jan 1, 2019, says "The PV
System shall comply with one of the following:"
In none of the three subsequent paragraphs does it ref to "module level
shutdown." Paragraph 2 says gets inside the array voltage under 80 volts
within 30 seconds so I understand
Hi all,
For micro inverters, what OCP is available for ground fault ( or arc fault)
for roof top mounted on a living structure?
Thx
Jay
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Is this in regards to 2014 NEC 705.12(D)(6)? This requirement was deleted
in 2017.
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
National Electrical Code® CMP-4 Member
(520) 204-6639
Solar Energy International
http://www.solarenergy.org
SEI Professional Services
h
Time for a radian and lose the x240. Modernize the system to split phase
and test for pressure leaks, pressure tank, pressure switch.
My
experience with the x240 got much better when Schneider, Outback went split
phase. They are fine for solar people but one more headache to an offgrid
homeowne
Hi Jay,
ArcFault protection is only required for systems operating over 80V, so isn't
required for most microinverters.
Enphase microinverters include ground-fault protection integral to the
microinverters and the GFI can be reset if it trips. Enphase provides
instructions on reseting a tri
Hello Wrenches. If you have any questions or concerns, please contact me
off-list.
This very interesting and important topic can be taken up at length on the
RE-Markets email listserver.
I'm assuming Eric will be starting the conversation soon, so if you're not
already on that listserver, you
Jay,
You're triggering some serious PTSD with this question. When 2017 NEC came
out Mass was the first state to adopt it and the inspectors started
requiring arc fault breakers on the micro inverter branch circuits, we were
using Enphase. At the time they didn't work, weren't really listed for
bac
Amos,
I have done this and it works. The VFX3524 will run a 3/4 HP (and a 1
HP) AC well pump just fine through a PSX-240. I have this setup in my
own home now, running on a 120V Magnum 4024AE. I would suggest a
soft-start AC pump with a conventional pressure switch, not the
constant-pressure
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