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
[email protected]
NABCEP Certified Photovoltaic
Installer
NABCEP Certified Technical Sales Professional
New Mexico EE98J Journeyman Electrician
Positive Energy, Inc.
3201 Calle Marie
Santa Fe, New Mexico 87507
505 424-1112
www.positiveenergysolar.com
On 9/30/2011 7:55 AM, [email protected] wrote:
Battery based grid tie system
Current array: 20 modules - 5 strings of 4
Proposed array: 32 modules - 10 strings of 3, 1 string of 2 -
all to MNPV12 combiner
changing charge controller (long story) and expanding system
to 2 CC's. voltage limits me to 3 max in string.
Question: is the 3-2 mix of strings an issue? Also - would
modules of slightly different voltages in the same string be an
issue?
Think I know the answer - that's why I'm asking
others.....just want to be sure
Holt E. Kelly
Holtek Fireplace & Solar Products
500 Jewell Dr.
Waco TX. 76712
254-751-9111
www.holteksolar.com
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