I just had my solar turned up. It’s a microinverter setup on the roof of my detached garage. It backfeeds to the house from the subpanel in the garage.
My iotawatt is at my main house panel. I haven’t changed anything with it since turning solar on. I’ve always had two CT’s for my main feed, and two monitoring the load in the garage.
I’m noticing a steady 2 amp load on both legs to the garage, even at night. The main CTs increased about the same with the system on as well. However my wattage graphs don’t show any extra power use. Even the status screen, Garage watts and amps on the top right don’t add up.
[EDIT] I never noticed the CT reversed on the MainFeed2 and GarageSub2. I just verified those CT’s are all facing the same direction. Reading the split phase section of the manual, it seems that is to be expected. I just checked the reverse tick box on those two. Didn’t change any readings however. I also checked with a handheld clamp meter, each leg of GarageSub is right around 1.8a
All this aside, I did buy a second IotaWatt that I plan on installing in the garage today so I can monitor the feeds from the disconnect directly without any other loads getting mixed in.
There could be a number of reasons for all of this. I’ll just ruminate on what I noticed.
The low power with high amps from the sub-panel appears to be a power factor issue. Unfortunately the IoTaWatt doesn’t add pf for inputs < 60 Watts so I can’t see what it is. You can add a couple of outputs for the GarageSub with units=pf. I suspect it will be very low, which is consistent with low power and high current. The micro-inverters are probably causing that, although you may have something else there like a vehicle charger with a big transformer that is idling. Regardless, you only pay for the power, not the amps. If you want to know more, look up power-factor in wikipedia. (These days, when you ask google a question, after all the adds, rather than answer your question they give you dozens of other questions that you might like to ask. But I digress)
If not for the apparent low pf from the sub-panel, I’d suspect that your MainFeed1 may not be latched together properly and is giving an artificially low reading. Worth a look. Make sure the cores are clean and not damaged where they mate.
You apparently have a high resistive load on the MainFeed2 leg of the panel, as indicated by the high pf. I don’t see any monitored branch circuit with a load anywhere near that. It could be something like a hair dryer, coffee maker or electric space heater.
You hit the nail on the head with main2. I had a space heater running. After I took the screenshot and posted, I thought about turning it off and re-screenshotting it. 
I’ll add some pf outputs too for the garage feed and see what they’re showing.
Not really much up there running/idle. Couple battery tenders on the cars, network Poe switch feeding cameras and wireless running off a small apc battery backup, and outdoor led lights at night. Usually I see around 100-140 watts depending what lights are on outside (on motion sensors)
I’m planning on installing my 2nd iotawatt up there today. I’m going to monitor the two hot legs from the solar, and the legs feeding that subpanel so I can see garage usage by itself. (Solar is line side tapped before the main breaker in that sub panel.)
Battery tenders, switching power supplies and APC battery backup units all typically have low power factors. The micro-inverters are probably the same when in standby mode as they would have been at 7:15 am.
Gotcha. That’s probably what it is then. I’ve seen power factor before, but never really put much mind to it. Then I couldn’t wrap my head around how amperage is up, but wattage is low based on typical calculations.
I guess in my graphing, I shouldn’t really worry about amperage and moreso just wattage of circuits and panels.
I’m really itching to put my other unit in the garage, and clamps directly on the solar output itself. I’ll report back later once I do. 
Update.
Now that I’ve installed my 2nd iotawatt in the garage, its clear the solar is creating the amp draw, but has a PF of zero.
Reading about the enphase inverters, it’s common to see.
On a side note, how should I setup my CTs on the solar. I’d like to see the opposite of what I’m getting with allow negative checked. I’d like to see positive when it’s generating, and negative if it’s actually drawing anything from the grid. (Which I know it shouldn’t).
Fwiw I uploaded to influx and display with grafana. Maybe it’s easier to reverse the numbers when displaying vs logging them that way.
Assuming its a 240V feed and you have one CT with double checked, just reverse the CT, either physically or with the reverse checkbox in setup.
IMO reversing things in influx would create a confusing situation. Better to have both the IoTaWatt datalog and influx with the same numbers.
Ohh. That’s simple. 
I actually used two inputs, one for each leg. Which I guess was overkill. It should always be a balanced load.