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Kirpal, None of the SQFlex equipment is UL listed. You may find that your AHJ won't approve any of the SQFlex controls and possibly not even the pump. Kent Osterberg Blue Mountain Solar Kirpal Khalsa wrote: Hi Folks.....I am working on putting together a domestic water pumping system using a grundfos 11 - SQF - 2. This system will be connected to a standard pressure tank and cistern and have a solar array providing primary power. However at night and on cloudy days we would like the system to switch back over to AC power from the grid. I know that the grundfos IO 101 switch box allows the pump to use an AC source and when the AC source is removed it automatically switches back to DC. What I am looking for is when the DC source (solar) is not available it automatically switches over to AC power (grid) ( the reverse of what the IO 101 switch does) and when the DC becomes available again it again automatically switches back to the DC power (solar). |
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