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With the PoCo maintaining line voltage at or above the legal limit, operating net metering can be
a problem. Power from the panel inverter will tend to push the voltage higher, and voltage drop
in the local wiring just adds to the problem. It is not very hard to see voltage that will trip out the
standard inverter line monitors, just when lots of energy can be stored.
Solutions to this problem include
1. Get the PoCo to lower their voltage
2. Reduce on site AC copper voltage drop (bigger wires)
3. Use inverters programmed for higher voltage
4. Use an auto transformer to shave a few volts off the line voltage that inverters see
Most of these have been tried here. Now the last one will be tested on another local
system (much smaller than mine). This 600VA transformer will be used to reduce 260VAC
line to about 230VAC to the inverters, shaving off about 30V at 14A.
Bruce Roe
HiLineAutoX.JPG
a problem. Power from the panel inverter will tend to push the voltage higher, and voltage drop
in the local wiring just adds to the problem. It is not very hard to see voltage that will trip out the
standard inverter line monitors, just when lots of energy can be stored.
Solutions to this problem include
1. Get the PoCo to lower their voltage
2. Reduce on site AC copper voltage drop (bigger wires)
3. Use inverters programmed for higher voltage
4. Use an auto transformer to shave a few volts off the line voltage that inverters see
Most of these have been tried here. Now the last one will be tested on another local
system (much smaller than mine). This 600VA transformer will be used to reduce 260VAC
line to about 230VAC to the inverters, shaving off about 30V at 14A.
Bruce Roe
HiLineAutoX.JPG
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