Moringstar USB MeterBus Adapter #UMC-1
The USB MeterBus Adapter converts the Morningstar MeterBus RJ-11 electrical interface to a standard USB 2.0 interface which allows communication between a PC and a Morningstar charge controller or inverter.
You can download MSView
(free software from Morningstar) to program your Morningstar charge controller for custom charging of Lithium-Ion batteries for example. Also, download "UMC-1 Windows Driver Package" from www.morningstarcorp.com