NOVELTY - Solar panel comprises: insulating glass unit (100) comprising first substrate (150); second substrate (160) parallel to and spaced from first substrate, and hermetically sealed; mini-junction device (180) between and at edge of substrates without extending beyond substrate periphery, and housing electrical coupling between first ends of pair of wires (120) and leads (114), second end of pair of wires extending beyond substrates periphery, and second end of pair of leads extending through first substrate; and photovoltaic module coupled to first substrate and second end of pair of leads.    USE - As a solar panel (claimed), useful for a variety of building structures (preferably green building structures) e.g. in window openings.    ADVANTAGE - The solar panel includes improved insulating glass units (IGUs) that contain mini-junction devices for use in green building constructions; as compared to conventional IGUs that are often coupled with connectors such as junction boxes that interfere with mounting the IGUs to building structures, have current leakage problems, and can not provide proper electrical isolation. The mini-junction device is configured to withstand at least twice the voltage of the IGU plus 1000 volts; and has a low profile that is less than a pre-selected value of a width of spacer (preferably less than 2, especially less than 0.5) inches. Thus the mini-junction device has a profile low enough so that it does not interfere with associated mounting structures of IGU; and satisfies the requirements specified in UL 1703 (a standard for flat-plate photovoltaic modules and panels).    DETAILED DESCRIPTION - A solar panel comprises: at least one insulating glass unit (100) comprising a first substrate (150); a second substrate (160) substantially parallel to and spaced apart from first substrate, where the first and second substrates are hermetically sealed; a mini-junction device (180) positioned between and at an edge of the substrates without extending beyond a periphery of the substrates, where mini-junction device houses an electrical coupling between a first end of pair of wires (120) and a first end of pair of leads (114), a second end of pair of wires extends beyond the periphery of substrates, and a second end of the pair of leads extends through first substrate; and a photovoltaic module coupled to first substrate and electrically coupled to second end of pair of leads. The photovoltaic module comprises plate, a first contact coupled to plate, a semiconductor coupled to first contact, a second contact coupled to semiconductor and coupled to second end of pair of leads, an interconnect between first and second contacts, and an encapsulant (112) positioned to environmentally seal photovoltaic module, where encapsulant includes an aperture (186) with pair of leads extending from aperture. The semiconductor comprises at least one p-n-i junction cells, where each of the p-n-i junction cells comprises a positively doped (p-doped) amorphous silicon layer; an undoped intrinsic amorphous silicon layer; and a negatively doped (n-doped) amorphous silicon layer. The semiconductor has an etching formed by removal of at least one portion of semiconductor to create regions of partial transparency. An INDEPENDENT CLAIM is included for an insulating glass unit comprising: the first substrate; the second substrate substantially parallel to and spaced apart from first substrate, where substrates are hermetically sealed; the mini-junction device positioned between and at edge of the substrates without extending beyond periphery of the substrates, which houses electrical coupling between first end of pair of wires and first end of pair of leads, and second end of pair of wires extends beyond periphery of substrates, and second end of pair of leads extends through first substrate; and the photovoltaic module coupled to the first substrate and electrically coupled to second end of pair of leads.    DESCRIPTION OF DRAWING(S) - The figure shows a side view of the insulating glass unit (IGU) in the solar cell panel.    IGU (100)    Encapsulant (112)    Pair of leads in mini-junction device (114)    Pair of wires in mini-junction device (120)    First substrate (150)    Second substrate (160)    Mini-junction device (180)    Aperture of the encapsulant (186)