Photovoltaic solar modules; converters; transportable power supply installations, in particular portable accumulator and battery packs; telephones; DC-driven consumer electronics, namely, radios and television receivers; portable sound and/or image recording and display devices for digital audiosignals with integrated power supply, in particular, integrated exchangeable or rechargeable batteries or accumulators; batteries, battery chargers, devices for photovoltaic devices, in particular, pho...