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000916163 1001_ $$0P:(DE-Juel1)187353$$aChibuko, Uchechi$$b0
000916163 245__ $$aModule-level direct coupling in PV-battery power unit under realistic irradiance and load
000916163 260__ $$aAmsterdam [u.a.]$$bElsevier Science$$c2023
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000916163 520__ $$aA photovoltaic (PV) module, battery and consumer or load is usually tied together by a complex power electronics, including maximum power point tracking (MPPT) device for power coupling to maximize output of the PV modules. At the same time, a typical battery itself can play the role of a power coupling element in addition to its main energy storage function. In principle, a properly chosen PV-battery pair can maintain a high degree of internal power coupling even under variable irradiance and load without MPPT electronics. This option is of interest for e.g. module-level integration of PV and battery to cope with natural intermittency of a PV module power output. In this work, we experimentally examine the function of a laboratory scale unit of a 7-cell silicon heterojunction PV module directly connected to a lithium-ion battery and variable load. The unit is the simplest PV-battery module representative for detailed study under a series of emulated realistic profiles of irradiance and power consumption. The directly coupled PV-battery unit shows coupling efficiencies of above 99.8% at high irradiance and approx. 98% on average through the daily cycle – a value that is comparable to modern MPPT devices
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000916163 7001_ $$0P:(DE-Juel1)130268$$aMerdzhanova, Tsvetelina$$b1
000916163 7001_ $$0P:(DE-Juel1)130302$$aWeigand, Daniel$$b2
000916163 7001_ $$0P:(DE-HGF)0$$aEzema, Fabian$$b3
000916163 7001_ $$0P:(DE-Juel1)166079$$aAgbo, Solomon$$b4
000916163 7001_ $$0P:(DE-Juel1)130285$$aRau, Uwe$$b5
000916163 7001_ $$0P:(DE-Juel1)130212$$aAstakhov, Oleksandr$$b6$$eCorresponding author
000916163 773__ $$0PERI:(DE-600)2015126-3$$a10.1016/j.solener.2022.11.040$$gVol. 249, p. 233 - 241$$p233 - 241$$tSolar energy$$v249$$x0038-092x$$y2023
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