Please Explain SW 4024 AC Qualify Time Setting
I get the basic idea, but it is not in the manual of either the User guide for the SW or the Combox. It is set in seconds and is the time it takes the SW to qualify AC input from the grid or a generator. Mine is set to 10 seconds.
What i don't understand. Today I connected a 4000w 120v Inverter generator to the SW thru the house main panel on L1 only. Turned off grid power, started the generator and the SW qualified the power from the generator in 10 seconds. The SW is able to take the 120v coming into the inverter and output it as 120v on both L1 and L2 as it is supposed to do. And I am able to charge from the generator using the SW charger albeit at a 50% charge reduction - again as the SW is supposed to do. So good so far.
But with the SW being powered from the generator and not drawing off batteries at all, with a 600 W load things are good. But the moment my well pump kicks in (a 240v 800W load), the inverter switched to battery as though the generator or grid went down, but only for about 10-15 seconds. It seems the AC in from generator gets "lost" and has to be qualified again. But the generator's RPM has increased, and in about 10 seconds the inverter switches back to generator power and stops drawing power from the batteries.
I am guessing this is because:
1. my generator cannot respond fast enough to the pump start surge thus the SW "thinks" I lost power
2. My 10 second AC Qualify Time is causing the SW to run off batteries at the start up of the pump
So I am wondering, What is the point of the AC Qualify Time? Should it be set to a short time or a long time? There is no info in the manuals about it (unless its in the SW install manual). Could I set that AC Qualifying time to 0 and then the SW would not switch from generator to batteries and back to generator when running on generator and a large surge load starts up? Or would that be too hard on the SW's internal contactors as it might jump back and forth from generator AC in to battery in at large startup loads until the generator is able to stabilize ?
REC TwinPeak 2 285W 3S-3P 2.6kW-STC / 1.9kW-NMOT Array / MN Solar Classic 150 / 2017 Conext SW 4024 Inverter latest firmware / OB PSX-240 Autotransfomer for load balancing / Trojan L16H-AC 435Ah bank 4S connected to Inverter with 7' of 4/0 cable / 24 volt system / Grid-Assist or Backup Solar Generator System Powering 3200Whs Daily / System went Online Oct 2017 / System, Pics and Discussion
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