[RE-wrenches] string fusing with 3-channel MPPT inverters

Brian Teitelbaum bteitelbaum at aeesolar.com
Fri May 26 13:19:05 PDT 2017


Hi Kirk,



Yes that is correct. On a three-input inverter, you could have as many as 6
strings of modules, 2 per MPPT input, and you would not need any
overcurrent protection on any of the strings.



One of the beauties of inverters with multiple MPPT inputs. Along with the
fact that the strings can be different lengths, orientations, and even be
different modules in each string.



Brian Teitelbaum

AEE Solar



*From:* RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] *On
Behalf Of *Kirk Herander
*Sent:* Friday, May 26, 2017 1:01 PM
*To:* RE-wrenches
*Subject:* [RE-wrenches] string fusing with 3-channel MPPT inverters



I’m installing a 3-input SMA 7.7kw inverter. Someone just mentioned to me
string fusing, normally required for >2 inputs may not be required since
each input has it’s own MPPT circuit. In essence treated like separate
single MPPT inverters for fusing’s sake. I don’t believe it, but opinions?
Thanks.



*Kirk Herander*

*Owner|Principal, VT Solar, LLC *

*Celebrating our 26th Anniversary 1991-2017*

*www.vermontsolarnow.com <www.vermontsolarnow.com>*

dba Vermont Solar Engineering

NABCEPTM  2003 Inaugural Certificant

VT RE Incentive Program Partner

802.863.1202
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