Victron MTTP info compared to BMV-712

rhyno

I installed my BMV-712 and now it shows the Current and Power info but now the MPPT shows zero draw in the Load output section for Current and Power. Is this normal or do I have something miswired?

For reference, the BMV-712 is wired inline between the distribution block and the battery bank's negative pole. B1 is wired to the first battery's positive pole and B2 is wired to the first battery's negative pole. I followed the wiring guidance from the AM Solar doc to wire the midpoint monitoring  cable. 

pthomas745

When I turn my battery switch off, with no input power to the battery (shore or solar) my Current and Power read zeros.

rhyno

I am running off battery and the BMV shows me pulling 4A, 120W. MPPT shows load at zero. I am in bulk charging mode so charging appears to be working fine. 

rhyno

... I think I figured it out but would like someone to confirm please.
It looks like the Load output section of the MPPT is for the monitoring of directly powered devices running straight off the solar panel. If so then that section should read zeros since everything powered in the Tab goes through the battery right? 

pthomas745

Oh...the Load section...I missed that.  Yes...unless you have some "small" 12V device wired directly to the Load outputs of the controller, then "Zero" would be normal. 

ChanW

The "load output" terminals on the mppt are for an indicator light. Offhand I don't remember what the reference is for in the app.

Edit: not sure that tells you anything about it...
Here a discussion about it:
https://community.victronenergy.com/questions/23783/purpose-of-load-output.html

I have nothing connected to those terminals.

rhyno

Thanks @pthomas745 for the sanity check! 

ChanW

Yeah, what @pthomas745 said!  Heh!

In the Victron documentation, they talk about various settings/uses for the Load Output terminals. Here:
https://www.victronenergy.com/media/pg/MPPT_Solar_Charge_Controllers/en/settings.html#UUID-3324d989-d2a8-cbf5-fdef-ec34e537176f