ZY2-40DC mndandanda ndi Zida Zachitetezo za Class C Surge, zomwe zidapangidwa kuti ziziteteza kumayendedwe amphezi mumagetsi amagetsi a photovoltaic.Mayunitsiwa ayenera kukhazikitsidwa mofanana pamanetiweki a DC kuti atetezedwe ndikupereka chitetezo chamitundu yosiyanasiyana.Zogulitsa zathu zilipo pamagetsi akuluakulu ogwiritsira ntchito photovoltaic: 500,600,800,900 ndi 1000 Vdc.