Voltage Dip Charging Cycle

[malkierian]

So I have a couple of the 24v DIYs on an AGM bank, but I have only one solar array hooked up to this as my main system needs almost everything, so I frequently have to connect a DIY to the Magnums to charge from their AC. When I do this, though, I get about a 10 minute cycle where the DIY disconnects AC charging and switches back to drawing from the battery for a few seconds, causing a severe voltage drop (noticeable on the lights). Is this normal behavior?

[malkierian]

Update: 10 minutes might have been overestimating the cycle. Sometimes it feels like 3-5 minutes.