PV Panel With Integrated Lithium Accumulators For BAPV Applications—One Year Thermal Evaluation

A new glass/polysiloxane/glass laminate photovoltaic (PV) panel with integrated lithium accumulators was developed. It can be suitable for building attached photovoltaics (BAPV) applications like emergency power supply. But there is very limited information available about real outdoor long-term temperature evaluation of lithium accumulators integrated with PV panels. Recently, temperature of lithium accumulators integrated with PV panels for period of one year was evaluated. Even at high ambient temperature +40 °C, the temperature increase of lithium accumulators was at maximum +13 °C during 8 A (0.2 C) charging/discharging cycles. As the operating temperature of lithium accumulators is limited to +65 °C, it should work well in regions with ambient temperatures up to +50 °C. Design of the new glass/glass PV panel with polysiloxane encapsulant sized (165*99 cm) 260 W, with integrated accumulators 40 Ah in new compact cooling box is described in the article.