10.07.2015   SonSolar

Scheme of the PV system for road lighting

PV module: 80 Wp ballast

battery: 12 V — 110 Ah

Fig. 1. The main components of PV system for road lighting.

In case of road lighting, a stand alone PV system is basically constituted by PV modules, batteries, charge regulator, DC/AC converter and AC load constituted by arc lamps. The main specifications of a commercial system, reported in fig. 1, includes two PV modules (for each 80 Wp), two lead-acid batteries (for each 12 V — 110 Ah at 100 h discharge rate), a charge regulator (24 V — 8 A) and a lamp (26 W) equipped with its ballast. Normally the lamp illumination does not last for all the night, in the worst months, but only for 6-8 hours.