Essentially, the inverter's input voltage range must be compatible with the solar panels' output. Most residential panels generate between 12-40 volts DC under regular operational conditions, while larger commercial systems might demand inverters that handle from 400.
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This can vary depending on your north-south location, but it generally ranges from 30-45 degrees for homeowners in the continental United States. Factors such as roof pitch and time of year can affect the overall efficiency of your arrays.
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The National Electrical Code recommends keeping voltage drop below 3% for individual circuits and 5% combined for optimal solar system performance.
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This is caused by low intermediate circuit DC voltage. This can be caused by a missing supply voltage phase from a blown fuse or faulty isolator or contactor or internal rectifier bridge fault or simply low mains voltage. POSSIBLE FIXES: Check mains supply and fuses.
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