Multiple string inverters for PV systems < 5kwp: When is this justified?

Bahaj, A.S. and James, P.A.B. (2004) Multiple string inverters for PV systems < 5kwp: When is this justified? In, Proceedings of the 8th World Renewable Energy Congress (WREC VIII). World Renewable Energy Congress (WREC-VIII) , Elsevier Science.


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A 24 string, 7.2 kWp vertical façade at Southampton University
has been used as a test bed to study the effects of mismatch
resulting from shading and module variation during manufacture.
A range of schemes may be applied to reduce the effect, which, at
its most extreme would be the use of a single inverter for each of
the 24 strings of the array. This paper presents an analysis of the
array operating under schemes of 2, 6 and 12 inverters.

It is shown that the increase in energy output of the multiple
inverter systems cannot justify the large disparity in capital cost
($/Wp) compared to a single central inverter. An analysis is
presented of the level of mismatch within the system that would
have to be present to allow the multiple inverter solution to be
selected on economic grounds. Such levels of mismatch are
unlikely to be found in the majority of correctly selected PV
installation sites.

Item Type: Book Section
ISBNs: 0080444709 (hardback)
9780080444703 (hardback)
Related URLs:
Subjects: T Technology
T Technology > TA Engineering (General). Civil engineering (General)
Divisions : University Structure - Pre August 2011 > School of Civil Engineering and the Environment
ePrint ID: 53472
Accepted Date and Publication Date:
16 November 2004Published
Date Deposited: 28 Jul 2008
Last Modified: 31 Mar 2016 12:32

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