AISWEI inverter cannot be used with thin film modules which require a functional earth on either the positive or the negative DC conductor, in these cases we suggest using an isolated (transformer based) inverter. Our non-isolated (transformerless) inverters are normally designed for silicon solar modules. However, there are thin film solar panels that do not require a functional earth, and in these cases AISWEI inverter will operate correctly. Before designing your plant, please consult with module supplier and our service for technical support. 

Yes, the PV array DC capacity can exceed the inverter AC capacity. The value of DC/AC ratio for each type of inverter is listed in its datasheet. A typical rule of thumb is that the PV array can be oversized by 20%. This is dependent on location and site irradiation levels. Excessive PV array oversizing will waste money and cause some impact to inverter’s reliability. If you are in doubt of oversize designing please contact your local AISWEI technical expert.