/ Perfect Welding / Solar Energy / Perfect Charging
FRONIUS INVERTERS &
mOdUlE-lEVEl pOwER ElECTRONICS
/ A yield comparison between DC optimised systems and conventional PV-systems
/ Both micro inverters and panel/DC optimisers are classified as Module-Level Power Electronics (MLPE). In a PV-
system equipped with MLPE, the yield of each module is maximized. Irradiation differences because of shade,
mismatching, different orientations or angles do not affect the other modules. In a PV-system with a string inverter,
modules that are connected to the same MPP-tracker are influenced by each other.
/ However, PV-systems equipped with MLPE do not always have higher yields than PV-systems with string inverters.
Sometimes the loss of MLPE is higher than the extra yield they gain. In reality PV-systems, either equipped with
Fronius string inverters or MLPE1, show a wide variation in yield performance. Derived from a technical analysis
investigation including computer simulations the following results show how Fronius string inverters compare with
MLPE.
yield of mlpe systems compared to fronius string inverter systems
unsHaded systems
Mismatching of the modules (0,5-1%) is countered by MLPE, but efficiency loss of each MLPE is 1-5%.
/ Up to +0,5% higher yield for some MLPE
/ Up to -5% less yield for other MLPE
sHaded systems
Homogeneous sHade* minor moving sHade major moving sHade
/ Up to +2% higher yield for some MLPE
/ Up to -4% less yield for other MLPE
*Mountain range, large building,
line of trees, row of other modules, etc.
/ Up to +4% higher yield for some MLPE
/ Up to -3% less yield for other MLPE
/ Up to +9% higher yield for some MLPE
/ Up to -2% less yield for other MLPE
1
Micro inverters; panel optimisers
All tests on PV-systems showed lower yields for MLPE systems than calculated. The benefit of MLPE at PV-systems was mainly visible in winter
when (partially) covered with snow.
Illustrations created with PV*SOL Premium by Valentin Software.
fronius superflex design,
dynamic peak manager, 2 mpptrackers, wide mpp voltage range
/ The Fronius SuperFlex Design is integrated in all Fronius
Symo and Primo inverters. The Dynamic Peak Manager
algorithm efficiently finds the global Maximum Power Point
(MPP) of modules and therefore mitigates potential yield
losses. The effects of shade can also be strongly reduced by
using the flexible connection possibilities, given by the
2 MPP-trackers with each a very wide voltage range.
More information: www.fronius.com/superflex
example:
/ Large chimney, placed right in front of the modules
Height 2 m, diameter 0.5 m
pv-system witH ... yield (compared to unsHaded)
/ String inverter without SuperFlex Design
/ 1 MPP-tracker, no Dynamic Peak Manager
-8% to -12%
/ MLPE -4% to -8%
/ String inverter with SuperFlex Design
/ Even distribution of modules to both MPP-trackers
/ String inverter with SuperFlex Design
/ Optimal distribution of modules to both MPP-trackers
-6%
-5%
benefits of fronius string inverters
/ Minimum number of components
/ Very low failure rate, highest lifespan
/ Easy access in case of service
/ Produced in Europe (Austria) for over 25 years
/ Family-owned company since 1945, excellent bankability
/ Perfect Welding / Solar Energy / Perfect Charging
WE HAVE THREE DIVISIONS AND ONE PASSION: SHIFTING THE LIMITS OF POSSIBILITY.
/ Whether welding technology, photovoltaics or battery charging technology − our goal is clearly defined: to be the innovation leader. With around
3,700 employees worldwide, we shift the limits of what’s possible - our record of over 800 granted patents is testimony to this. While others progress
step by step, we innovate in leaps and bounds. Just as we’ve always done. The responsible use of our resources forms the basis of our corporate policy.
Further information about all Fronius products and our global sales partners and representatives can be found at www.fronius.com
Fronius India Private Limited
GAT no 312, Nanekarwadi
Chakan, Taluka - Khed District
Pune 410501
India
pv-sales-india@fronius.com
www.fronius.in
Fronius Australia Pty Ltd.
90-92 Lambeck Drive
Tullamarine VIC 3043
Australia
pv-sales-australia@fronius.com
www.fronius.com.au
Fronius UK Limited
Maidstone Road, Kingston
Milton Keynes, MK10 0BD
United Kingdom
pv-sales-uk@fronius.com
www.fronius.co.uk
v06 Apr 2016 EN
Fronius International GmbH
Froniusplatz 1
4600 Wels
Austria
pv-sales@fronius.com
www.fronius.com
Text and images c orrespond to t he current state of techn ology at the t ime of printing. Subject to mo dificat ions.
All info rmation is w ithout gua rantee in spite of carefu l editing - liabilit y excluded. C opyright © 2 011 Fronius™. All rights re served .
as17
EN v01 Apr 2017
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