The elec­tri­cal pa­ram­e­ters of the so­lar sys­tem are mea­sured at the grid con­nec­tion point in or­der to mon­i­tor the pow­er out­put at any giv­en time - in­de­pen­dent of the in­vert­er. In the case of larg­er sys­tems with sev­er­al grid con­nec­tions points, se­parate mon­i­tor­ing units can be in­s­talled for each grid con­nec­tion point. If sev­er­al in­vert­ers are in­s­talled, it is al­so pos­si­ble to mon­i­tor each in­di­vi­d­u­al in­vert­er on the AC side in ad­di­tion to mon­i­tor­ing of the mains pow­er sup­p­ly. The mon­i­tor­ing unit is avai­l­able for both in­doors- and out­doors in­s­tal­la­tion, and is sup­plied with con­nec­tions for cur­rent/vol­t­age trans­form­ers, pow­er sup­p­ly, ref­er­ence pan­el, DC and in­vert­er com­mu­ni­ca­tion. The elec­tri­cal pa­ram­e­ters (I, U, P, PF, E) can be mon­i­tored on site us­ing the LCD dis­play in­te­grat­ed in­to the front door. For con­nec­tion to a net­work or the In­ter­net, the mon­i­tor­ing unit can be fitt­ed ei­ther with a lo­cal net­work (LAN), broad­band (DSL) or cell phone con­nec­tion (GPRS). In net­works equipped with sev­er­al mon­i­tor­ing units, one unit must pos­sess a broad­band or cell phone con­nec­tion. All the other units can then be equipped with a lo­cal net­work connection. >>