Just finished adding a third Smart Solar MPPT to my RV setup (150/85 TR). Did a test run in the air conditioning off battery and noticed that the math shown on the touchscreen appeared off.
As you can see, I have 1203W of load on my Multiplus II 2000 (120v) and 795W of solar coming in. There is an additional SmartShunt monitoring my DC loads which shows another 80W.
So 1203W + 80W = 1283W of loads approx, minus 795W of Solar into the battery should leave 488W approx that would need to be pulled from the battery.
However the battery SmartShunt (and on the battery Bluetooth app) shows 842W are being drawn from the battery. The remaining 354W approx are missing.
All loads and sources are connected to the Lynx distributor and then the distributor negative goes through the BMV 712 back to the battery. It’s a Renogy Rego with large Anderson connectors so it’s not possible to connect anything else to the negative before the smart shunt. The 712 is reading accurately and is matching the Bluetooth interface for the battery.
Note that on smaller loads (400W or so) the math works out almost perfectly with some margin of error but I’ll need to monitor that more to be sure.
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I’m sure this is something dead simple, but ever since upgrading to GuiV2 I’ve been keeping an ion on things and questioning odd items compared to the old firmware branch and GuiV1.
Cerbo GX (pre 2022) v3.64 OS
Multiplus II 12/2000/80 - 50 120V
BMV-712 to battery negative
SmartShunt for Dc loads configured as DC Loads coming from RV 12v load center
Lynx Distributor for all connections
SmartSolar MPPT x 3
Renogy Rego 12v 400ah (not networked yet)
