solaredge case study oxford uk
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8/2/2019 Solaredge Case Study Oxford Uk
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On November 17 th 2010, Engensa, aleading British installer o PV systems,installed a 3.3 kWp PV installation onthe roo o a property in Ox ord, UK. Theowner o the property, Mr. Bakewell, isalready amiliar with solar technology. Asthe owner o a swimming pool businessand a supporter o green technology,he promotes the use o solar heatinginstallations to keep the pool waterwarm. His beauti ul old estate, bathed bythe scent o the surrounding pine trees,serves as an exhibition space or hispools. To improve his carbon ootprinteven urther Mr. Bakewell wanted toinstall a grid-connected PV system onhis house.
“When I frst consulted a PV pro essional
about installing a grid-connected PV installation, I explained to them that I hadtwo houses at about 10 meter distancerom each other, both o which have a
south acing roo acet. The pro essionalrecommended that I install two PV installations using two inverters, oneor each roo ” says Mr. Bakewell. Theproblem was that the roo s o the twohouses have two di erent slopes: onehas a 25˚ slope and the other has a 40˚slope.
“They also said that my pine trees couldpose a problem because they cast shadeson my home in the mornings.”
Traditional installation habitsrecommend avoiding shaded areas onthe roo and stick to rather rigid designrules: strings connected to the same
inverter need to be identical in length,orientation and slope, as do modulesin a serial connection. Hence, in theire orts to avoid mismatch betweenmodules, installers are limited in theirreedom to design PV systems the waythey would ideally like to.
The surprise came when Mr. Bakewellcalled Engensa or a second opinion.He ound it was actually possible
to install one PV system that wouldspread across the two roo s usinga SolarEdge inverter and SolarEdgepower optimisers. The installed systemconsists o one SolarEdge SE3300inverter, 18 185W ET Solar modules,and 18 SolarEdge PB250-AOB poweroptimisers connected together in onestring spanning the two di erent roo s.Power optimisers are attached to eachmodule separately and track their
individual Maximum Power Point. TheMPPT is optimal at all times regardlesso the mismatch between the modules.
OVERVIEWSpecial focus: Di erent slopes
Installer: EngensaInstallation date: 17 Nov. 2010
Location: Ox ord, UK
Average Irradiance:
1120 kWh/m 2 /year
Installed Capacity: 3.3kWp
Modules: 18 x 185W ET Solar
Power optimisers:
18 x PB250-AOBInverters: 1 x SE3300
Multi-facet InstallationOxford, UNITED KINGDOM
www.SolarEdge.com in [email protected]
CASE STUDYHighl igh ted Pro jec t
To sum up: installers who work withtraditional inverter systems are limitedin their ability to design tailor-made PVsystems and have to use complicated,and o ten costly, installation strategies.Engensa has been working withSolarEdge or a while now and o ersits technological advancements tobreak through existing boundaries.SolarEdge enables the installationo PV systems with optimal energyoutput regardless o the amount o partial shade. The SolarEdge poweroptimisers also maintain a fxed stringvoltage that extends the maximumstring length. These advantages are o particular importance in the UK, where itis very common to install on a group o
neighbouring row house roo tops.“SolarEdge’s product is thebreakthrough that we have beenwaiting for. Providing our customerswith the best innovations on the marketwhilst maintaining reliability and valueare central to Engensa’s companystrategy. SolarEdge is the only productof its type that we trust, due to theirunparalleled track record and longerwarranty conditions.”
Dr Toby Ferenczi CTO Engensa
architects of energy ™
A 3.3 kWp installation consisting o one string with 18 modules that spreads across two roo s with twodi erent slopes: 25° and 40°. The string is connected to a SolarEdge SE3300 inverter.