After the startup period, system 2 produced voltages a minimum of 29.4% larger than system 1 and a maximum of 184.3% larger.
System 2 produced daily voltage readings that were on average 42.4% larger than system 1. Similarly, system 2 produced daily voltage readings that were on average 32.8% larger than system 4. After day 50 systems 1, 2 and 4 were approaching steady state with daily voltage readings of 0.309 ± 0.012, 0.434 ± 0.014 and 0.307 ± 0.012, respectively. During this period system 2 constantly produced voltage readings at least 30% higher than either system 1 or 4.