Hello Wrenches,
We are moving a roof vent. My plumber suggested that we cut the old
one and cap it instead of having to repair the roof. I'm not sure a
capped vent would be short enough to fit under the array.
What if we were to cut the vent off at the flashing level and plug
the pipe. A
So this is a plumbing vent instead of a furnace or hot water exhaust vent?
Ive used Fernco rubber caps on unused vents, with the screw down pipe
clamps around the bottom. Also these are just to allow air into the vent so
draining water doesnt create a vacuum so I suspect there is little to be
Are you talking plumbing vent or attic vent? Either can be moved, but we have
simply cut plumbing vents to be under the array where the jurisdiction will
allow. I wouldn't seal a plumbing vent.
Attic vents we lower and sceen to keep critters out but still allow venting.
Max Balchowsky
Design
Hey Wrenches Nick Soleil (with whom I worked at APS for a time I believe...),
I'm not familiar with Enphase commercial applications and am currently working
through a commercial design. Enphase, on their M215 datasheets claim up to 25
micros per branch, at 1.0A each, with each branch
Hi Eric,
It is 25 inverters on a 20A circuit, but only on 208 three phase. Each micro
connects to the cable in an alternating way (L1/L2, then L2/L3, then L3/L1,
etc.) so with 25 micros there are either 8 or 9 micros on each combination.
9 x 1.0 A x 1.732 (square root of 3) x 1.25 = 19.48 A =
Be sure to read Enphase's tech sheet on center tap of branch circuits.
Holt E. Kelly
Holtek Fireplace Solar Products
500 Jewell Dr.
Waco, TX 76712
http://www.holteksolar.com/ www.holteksolar.com
254-751-9111
From: re-wrenches-boun...@lists.re-wrenches.org
Anyone else getting inundated with SunBandit Hybrid Solar Water Heating
System marketing emails? Any first impressions? Here are my initial
thoughts:
Pros - provides hot water in utility outages, no interconnection hassles,
possibly easier permitting hurdles, eliminates moving parts in active
There are similar systems available to this one. I think you mean that
the inverter is UL 1741, but the system is not grid-interactive.
Stand-alone inverters can be listed to 1741 as well.
IIRC, when I saw them at SPI 2012 they were doing everything in DC. They
may have switched to AC so they
Anyone have a good pricing comparison for a 100kW attached to a flat roof
using stand offs versus a ballasted mount?
Equivalent on the labor?
--
Stay Energized, PEACE
Aur J Beck,
NABCEP Certified Solar PV Installer™ 032611-24
NABCEP Certified PV Technical Sales™ PVTS032412-6
chief tech of
Hi Max and Bill,
Thanks for your input. The actual plumbing vent
will be rerouted to go out of the north pitch of
the roof. There will only be a an open pipe left
in the attic. The main issue is finding ways of
keeping water out of the vent pipe (now
abandoned) and getting it short enough
Drake,
If you are relocating the vent and abandoning the existing hole then could you
not just cut the vent flush to the roof or cut it right out and slide a
flashing up under the above shingles to cover the hole, rather than plugging
and filling the vent?
Or...
Given the pitch of the roof and
Your point about Romex is a good one, but hardly worth the cost of an
inverter I would think... I'd have to do that math... Yes, I meant 1741,
and forgot that covered standalone inverters as well... Been away from
off-grid too long!
To Larry's point, I agree that the cost posted online is
I agree with needing to read the center-tap paper. However, we have found
that it's sometimes just as easy and cost effective to use shorter strings
and combine in AC load centers for a run to the interconnection point. It
depends on the layout and how many splices and j-boxes you would need.
Hi Jason
I would only add that this continues the issue with single tank solar/ grid
combos
IE it's hard to make sure the heat is coming from solar, as the tank has the
thermostat from the grid side as well.
It's a solution still looking for a problem.
Jay
Peltz power
On Oct 3, 2013,
That was one of my thoughts. It must be very advanced control to know when NOT
to use utility power. Of course one could switch off the grid power….but then
how well does it function without it?
Just add a few more sub $1 per watt PV modules, a high efficiency electric
water heater and let the
I've always just plugged the old hole completely with plywood of the same
thickness and shingled over it with a matching shingle. Only when it's under
the array and I'm re-routing the vent. That has always seemed like the most
professional way of doing it in my opinion.
Maybe that's not the
Mac:
I approached this problem some years ago and posted about it on this forum.
What I heard is that, yes, it can be done. The actual process is known by a
few former Trace engineers and could not be divulged due to confidentiality
agreements signed when Outback split off from Xantrex (or
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