Solar Wise Wagga Reviews

One Year Follow Up Review

For power output the system met what I expected. This initial 4.125 kW Nett system was installed beside a nine year old 1.225 kW Gross system (Fronius IG15 Inverter with seven Sharp 175 Watt PV panels). For every year of the nine years the Gross system has consistently produced an average of 4 kWh per day. It did not deteriorate over the years. Daily generation ranged from 1 kWh to 7 kWh depending on the weather. How do I know? Because I had a Fronius wireless remote display in the kitchen where I could see the instantaneous power generated by that system updated every 3 seconds, and at the end of the day the display showed the total generated that day. Pressing buttons provided monthly and yearly totals. Unfortunately the Fronius Inverter failed in February and was not worth replacing. In place of its seven 175 Watt PV panels I installed six 320 Watt PV panels connected to the new Nett system. I have no idea what the new Nett system has generated over the seven months. Nine years after the earlier system that told me everything I wanted and I cannot get a refreshing display for the new system. Progress–HAH! So much data has been lost it is a joke. But I did compare the two systems on two particular days in September 2016. By dividing the respective total energies generated by each system on each day by its nominal kW system capability (1.225 kW old system, 4.125 kW new system) you get a figure representing the equivalent number of hours at full capacity of each system, so they are directly comparable. 2016-09-09: old system 3.26 hours; new system 3.76 hours 2016-09-10: old system 2.86 hours; new system 2.79 hours From that I surmised the new system was performing properly then. Nowadays the new system has been upgraded to 6.045 kW and over the last month (30 days) has generated 644 kWh or 21.5 kWh/day. The minimum daily generation over the month was 5.6 kWh and the maximum 29.2 kWh.