5. Operation
5.1. Device display
The Multi RS Solar has an LCD screen that displays operational information.
Inverter:
Inverter state, Power output, Frequency and AC Voltage
Battery:
Battery Power (charging shows positive number, discharging shows negative number), Current, DC voltage, Temperature (*), State-of-charge (*) and Time-to-go (*). Battery state (e.g. discharging, bulk, absorption, float, etc).
(*) These items are only visible if the data is available.
 | Communicating on any interface (e.g., Bluetooth, VE.Can, etc.) |
 | Bluetooth Enabled, Icon colour changes when connected |
 | (Blinking) Error or Warning |
 | Inverter Active |
 | Battery, fill corresponds with voltage, blinks when empty |
5.2. History - Thirty-day graphic
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(The fragmented square icon (top left) allows you to toggle between 'portrait' and 'landscape' screen presentations.)
A summary of activity for the last 30 days is presented graphically. Swipe the bar left or right to show any of the previous 30 days.
The daily log shows:
Yield: The energy converted for that day.
P max: The maximum power recorded during the day.
V max: The highest voltage from the PV array during the day.
Clicking on any day/bar in the graph will expand the information to show charge-status times - both as hrs/m; and also as a percentage of the 'charge' day. This graphic provides an at-a-glance representation of how much time your charger is spending in each of three modes: Bulk / Absorption / Float.
Tip! You can use the charge times to see if the PV array is properly sized for your requirements. A system which never reaches 'Float' may need more panels; or perhaps the load could be reduced?
It is possible to export the history as a comma separated file (.csv) by clicking the three connected dots at the top right of the history screen:
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This is an example of the exported data for 3 of 30 days:
Battery Voltage
The first figure shows the maximum battery voltage for the day …the figure below is the minimum battery voltage.
Errors
Shows the number of errors (if any) for the day, to see the error codes click on the orange point. See MPPT Solar Charger Error Codes. (You may need to slide the display on your device up to see the errors.)
Total
This shows the total energy converted by the installation and is not re-settable.
Since Cleared
This shows how much energy has been converted by the installation since the last reset.
5.3. Protections and automatic restarts
5.3.1. Overload
Some loads like motors or pumps draw large inrush currents during start-up. In such circumstances, it is possible that the start-up current exceeds the over current limit of the inverter. In this case the output voltage will quickly decrease to limit the output current of the inverter. If the over current limit is continuously exceeded, the inverter will shut down for 30 seconds and then automatically restart. After three restarts followed by overload within 30 seconds of restarting, the inverter will shut down and remain off. To restart normal operation, disconnect the load, Switch Off the inverter, then switch it On.
5.3.2. Low battery voltage thresholds (adjustable in VictronConnect)
The inverter will shut down when the DC input voltage drops below the low battery shutdown level. After a minimum shutdown time of 30 seconds, the inverter will restart if the voltage has risen above the low battery restart level.
After three shut down and restarts, followed by a low battery shutdown within 30 seconds of restarting, the inverter will shut down and stop retrying based on the low battery restart level. To override this and restart the inverter, switch it Off, and then On, and limit loads to enable recharging of the battery with solar energy.
See the Technical Data table for default low battery shut down, restart and charge detect levels. They can be adjusted with VictronConnect (computer or app).
Additionally another external MPPT or battery charger can also be used to recharge the battery to reach the Restart Voltage or Charge Detect voltage level. !!! If using the allow to charge signal functionality, it must remain above the minimum voltage, so if the battery is completely dead it will not allow charging to start. In this case, you can temporarily disable this function in VictronConnect to allow charging to resume, then enable it again.
See the Technical Data table for default low battery shut down and restart levels. They can be changed with VictronConnect (computer or app). Alternatively Dynamic Cut-off can be implemented, see https://www.victronenergy.com/live/ve.direct:phoenix-inverters-dynamic-cutoff
5.3.3. High battery voltage
Reduce DC input voltage and/or check for a faulty battery- or solar-charger in the system. After shutting down due to a high battery voltage, the unit will first wait 30 seconds and then retry operation as soon as the battery voltage has dropped to acceptable level.
5.3.4. High temperature
A high ambient temperature or enduring high load may result in shut down to over temperature. The inverter will restart after 30 seconds. The inverter will continue to try and resume operation, and will not stay off after multiple retries. Reduce load and/or move inverter to better ventilated area.