I've been banging my head against a wall for almost two years on this
issue as microinverters have gained traction and combining several
circuits in a PV subpanel is common, even on residential jobs. I'll take
another run at it and see how it goes. We've been doing lots of supply
side connections
Holt,
The string of two will contribute nothing to the charging, as the
combined input voltage will be above Voc for the string of two.
Better off storing the last two for spares.
Allan
Allan Sindelar
al...@positiveenergysolar.com
The requirements listed in 250.52(3) were changed in 2011. The rebar
used is allowed to be near the bottom of the footing or in vertical
foundation walls that are in direct contact with earth. If there was in
doubt in the past that the rebar in the concrete of a pole mount was a
suitable
Go with all 32 as 8 strings of 4. Replace both CCs with Classic 200 or 250.
Thank you,
Maverick
Maverick Brown
BSEET, NABCEP Certified Solar PV Installer ®
President CEO
Maverick Solar Enterprises, Inc.
Office: 512-919-4493
Cell:512-460-9825
Sent from an iPhone.
On Sep 30,
Hi Holt,
Ditto what Allan saidOr, If you must have the extra power, add a separate
charge controller to operate those two PV modules.
I assume that the modules are already owned since you would not design a system
with mixed modules. Mixing different PV modules will always cause a loss of
Maverick,
I don't think system owner will let me pry his mate3 out of his hands.and
oops! it will be 2- 6 slot combinersthanks for the feedback. Look forward
to meeting you someday.
Holt E. Kelly
Holtek Fireplace Solar Products
500 Jewell Dr.
Waco TX. 76712
254-751-9111
Todd,
Article 250.52(a)(3) from the 2008 Code states this
(3) Concrete-Encased Electrode. An electrode encased
by at least 50 mm (2 in.) of concrete, located horizontally
near the bottom or vertically, and within that portion of a
concrete foundation or footing that is in direct contact with
I've also used 250.52A(7) defining plate electrodes. A 6 Sch 40 pipe 4
ft in the ground has more than the required 2 sq ft of surface metal,
and is at least the required 1/4 thickness.
Also, the 2011 NEC dropped 690.47 D which required a grounding electrode
at the array. Are you sure you still
This reminded me of another subject about the MATE3.
I was surprised to find out that advanced generator start does not work
properly if the batteries reach LBCO before the 2 minute start timer fires the
generator with an external relay attached to one of the inverters. The AGS
settings are
Ray,
I believe that a pole-mounted or grounded-mounted PV array is considered
a structure and requires a ground electrode per 250.32. Perhaps the
exception would cover the possibility a installing very small system
without a ground electrode.
Kent Osterberg
Blue Mountain Solar, Inc.
Ray
I'm a big fan of grounding at the array, and was sorry to lose 690.47D
(which also clearly allowed the structure to be considered an electrode) .
I think if you look at the sq ft. of metal in contact with the concrete,
you can make a credible case for the frame fitting the definition of an
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