Victron SmartSolar and BMV712 connections to shunt?

[mitiempo]

Originally Posted by Scrimma

I read it somewhere that the battery monitor can control the solar charging or something to that effect. Don't quote me on that, but I read it in a couple places a few weeks ago. I'm with you though. Doesn't seem necessary.

No it doesn't.

[Yellowjacket]

Originally Posted by DK2

The BMV712 and the MPPT dont ‘talk’ to each other by Bluetooth. What would they say anyway? They talk individually to your VictronConnect monitoring app.

The BMV 712 tells the MPPT the temperature of the batteries and voltage.

[rgleason]

I would connect the MPPT direct to the load side of the shunt (not bat neg).

[Stu Jackson]

You keep mentioning "inverter battery." Is this the same as your house bank, or is it a separate battery?

[dutch-barge]

Originally Posted by Pascals Wager

I have both the 712 and smart solar and didnt know they communicated with each other? Not sure why you'd want that. The blue tooth is for remote monitoring via the app afaik.

They do NOT communicate with each other
The Blue tooth is ONLY for READING INFO on your phone or tablet.

[Pascals Wager]

Yes i believe thats what i said

[Yellowjacket]

Originally Posted by dutch-barge

They do NOT communicate with each other
The Blue tooth is ONLY for READING INFO on your phone or tablet.

I believe the MPPT recieves battery temperature and battery voltage from the 712, via bluetooth. From the manual:

"With a Smart Battery Sense is installed; the actual battery temperature will be used for compensation; throughout the day.

In case there is no external source for battery temperature; charger uses its internal temperature for battery temperature compensation. The temperature reading is taken in the morning; when the charger has been idle for at least one hour, i.e. when the charger is not actively charging a battery or supplying a load.

Low temperature cut-off
This setting is available when a VE.Smart network is set-up and the battery temperature is available (e.g. by for example using a Smart Battery Sense or a Smart BMV with the optional temperature sensor). It can be used to disable charging at low temperatures as required by Lithium batteries."

[dutch-barge]

Again. the MPPT blue tooth is ONLY for reading by a smart phone or tablet
Quoting the manual "Appendix1.11 Configuring and monitoring- Bluetooth Smart (built-in): connect to a smartphone or tablet running iOS or Android"
The MPPT can provide its data ALSO to a CCGX or a Venus with a SEPARATE cable

The Negative is connected into the system at the out of the shunt ( the other side to the neg of the batteries)
The MPPT does not have to be close to the shunt.
A 2 Meter run is not that long
You can adjust the floor, bulk voltages on the MPPT, so you can adjust for the voltage loss of the 2 meter.
The MPPT reads its own temperature

[Yellowjacket]

So, you are saying, without hesitation, that the MPPT controller does not receive ANY info via bluetooth from the 712?

I don't know how you reconcile that statement with the quotes from the manual I provided above. Always possible I misread it, I suppose.

Yes, bluetooth is used for sending info to smart phones. It is also used to transmit information about temperature and battery voltage to the MPPT.

"With a Smart Battery Sense is installed; the actual battery temperature will be used for compensation; throughout the day.

In case there is no external source for battery temperature; charger uses its internal temperature for battery temperature compensation."

"A two meter run is not that long"

That depends, I suppose, on how long you need it to be.

[dutch-barge]

please share the pages you are referring to

the MPPT has an internal temp sensor
The MPPT is connected + to the battery +. Negative to the the Shunt where all the loads connect. NOT the connection point going to the battery. ( this way the BMV can measure to energy the MPPT puts into the bank.

the BMV can use an optional temp sensor

the blue tooth is so you can read info
Victron uses Ve.can and Ve.bus for communication between multi's MPPT's and their controller series, Venus, CCGX etc

The MPPT has a VE.direct port, which can connect to the Venus, CCGX or a MPPT control. ( which has the same look as a BMV)

[Yellowjacket]

https://www.victronenergy.com/access...-battery-sense

https://www.victronenergy.com/live/v...&s=temperature

Section 4.1

Yes, MPPT has an internal temp sensor, which it uses when there is no external source for battery temperature.

You now have access to this information, and I am going to respectively withdraw from the conversation.

[OceanPlanet]

The Smartsolar MPPT can get both battery voltage and temp via BT...from the Smart Battery Sense. But not from the BMV712.

[dutch-barge]

scrim wrote....100/50 Smart solar and a bmv712.
there was NO mention of a smart battery Sense

so "So, you are saying, without hesitation, that the MPPT controller does not receive ANY info via bluetooth from the 712?" correct ONLY from the smart battery Sense, which Scrim who started the discussion...never mentioned in his posting.

Thanks for clearing it up.

[CatNewBee]

Not true, the MPPT controller talks to the BMV via BT and receives the Voltage, the current does not make much sense in this scenario.

The current is the summ of all currents at the shunt, given there may be other charge sources and loads active at the time there can be any reading from negative current to current higher than the output of the Smart Solar controller.

For the charge program of the controller the Voltage at the battery is more significant, and to eliminate the voltage drop along the line to the battery, the Smart Solar requests the system Voltage measured at the shunt by BT, because there is no dedicated sense wire connection for this purpose. It also continues to measure the voltage internally and calculate the voltage drop along the connection.

You can see it in the app when looking at the voltage jumping every few seconds between the local reading and the remote reading under load.

[d design]

Originally Posted by CatNewBee

Not true, the MPPT controller talks to the BMV via BT and receives the Voltage, the current does not make much sense in this scenario.

The current is the summ of all currents at the shunt, given there may be other charge sources and loads active at the time there can be any reading from negative current to current higher than the output of the Smart Solar controller.

For the charge program of the controller the Voltage at the battery is more significant, and to eliminate the voltage drop along the line to the battery, the Smart Solar requests the system Voltage measured at the shunt by BT, because there is no dedicated sense wire connection for this purpose. It also continues to measure the voltage internally and calculate the voltage drop along the connection.

You can see it in the app when looking at the voltage jumping every few seconds between the local reading and the remote reading under load.

This is true.

https://www.victronenergy.com/live/v...art-networking