New 500A SmartShunt installation in an RV with 2 12V batteries connected in parallel. The batteries are from 2015 but still working just fine. Full charge is 12.7-12.8. I have a knife type disconnect to take the batteries completely offline for storage as there are some small draws (parasitic) that circumvent the RV's "on/off" switch. So I turn that off and pull the knife switch which turns off all loads to the battery set. I installed the SmartShunt between the system negative loads and the knife switch attached to one negative terminal. Questions:
1. When I installed the SmartShunt, as soon as I attached the + wire to the battery the shunt went active even before I closed the knife switch. This means the circuit is finding ground somewhere else. There is a whole circuit through the battery isolation monitor (BIM) that reach the chassis (starter) battery to control charging from the generator and also from the chassis alternator. Also there are some 12V items that will run even with the knife switch open, for example the power step and the rear stabilizer jacks. So I assume this is OK that it started up immediately, but wanted to confirm that. (It was not measuring current to/from the battery bank because was not attached to them yet, but it was running with the blue light blinking ready to connect, and it did connect.)
2. For RV storage, I don't want the SmartShunt to stay in standby mode even thought it's a small draw. It is stored outside in deep cold (can be 0 to -20F). Should I disconnect the + line fuse to the shunt? Or just not worry about it at all?
3. For charge level, the manual recommends 13.2 which is my charge float level. But manual also says to set 0.2-0.3 below the float level. If I set it at 13.0, when would the charge level ever be reached since the charger will keep the level at 13.2? I'm inclined to go with 13.2 and ignore the advice to set below the float level??
4. The batteries are unlabeled and unbranded in any way but have a sticker "D27DG-160." The closest I can find anything on is D27DC-160. This shows a reserve capacity of 160 mins. @ 25A which is 66.66 aH. I would have thought the capacity to be higher but does that seem like a good number? If I double that for the two batteries I get 132 but would probably use a lower number given the batteries' age. Thoughts?
5. Every time I connect with the Smart Connect app, the Trends graph starts from scratch. It retains no history, so it's not possible to see "trends." The History tab retains its data but no matter how far I zoom out the graph, it shows only the last few seconds or minutes that the app is connected. As soon as I switch to another app, the history is lost. The manual states in the Trends section, "Providing that the firmware battery monitor is up to date, the battery monitor will store up to 45 days of past data." How can I capture and view the full history?