When the exploitable surface is reduced and has hard conformations, the ideal solution is just our triangular modules Trienergia, that properly fits on roofs specially shaped. Like this PV system realized by Tecnopro of Voghera (PV) on a residential structure in Rovescala (PV), where he had used COE95 and COE190 Trienergia modules and SMA 4000TL-20 inverter buyed from Coenergia S.r.l., Bondeno di Gonzaga (MN) - Italy. Total power of 4,37 kWp.