The Symphonie iPack for PV only contains a 12V rechargeable Gel Cell battery pack and PV charging circuit in a specially designed weather-tight enclosure. PV panel must be ordered separately. Applications Provides a "Stand-Alone" power solution for the Symphonie NRG logger when "continous mA" current draw sensors such as the NRG BP-20 and RH-5 are required. sites where remote communications are not required Features Interfaces directly to the Symphonie NRG Logger by connecting to a DB25 port located on the back of the Symphonie NRG Logger. The iPack and Symphonie NRG Logger are secured to the shelter box via four long screws. Modular approach provides flexibilty as the iPacks can be moved to different sites as new technologies or system requirements evolves. Not sure which iPack you need? See our iPack comparison chart...