EasySolar-II GX 48/5000/70-50 not using PV

[BambuSky]

VRM and VictronConnect do not show PV output for new PV panels added to an EasySolar unit that has been running as grid backup for 4 years. The MPPT (serial number HQ2113XXXXX) has never been used, until now:

• 1 x Victron EasySolar-II GX 48/5000/70-50 (with internal SmartSolar MPPT VE.Can 250/100 rev2)
• 1 x Dyness Powerbox F-10.0 9.6kWh Li battery (has internal BMS)
• New: 12 x 585W PV panels

VRM and VictronConnect show around 200V from the PV Charger, but 0W and 0A output from new PV.

No error messages are shown and nothing in the logs indicates a fault.

If the EasySolar is turned off (or the remote switch plug removed), VictronConnect (via Bluetooth direct to MPPT) shows about 4,000W being drawn by the battery.

This implies that the MPPT does function, but when the Multi and GX are powered up, the MPPT output is disconnected.

All the devices can be viewed in VRM when powered on, and have the latest firmware:

• Gateway
• EasySolar-II GX 48/5000/70-50
• DYNESS Powerbox F-10.0 9.6kWh
• SmartSolar MPPT VE.Can 250/100
• CARLO GAVAZZI ET112 Grid Meter

MPPT Solar Charger PV Short Relay Reset has been reviewed and tried but there is no “PV Short Relay” reset line for models prior to HQ2150XXXX.

Please help diagnose why the PV output is not being seen by the Multi/GX, and how to solve this.

Thanks

[MikeD (Mike)]

What do you get from “why is the charger off?”
Also, if you go into the MPPT settings, check to see what parameters are set…

[BambuSky]

The “Why is the charger off?” link displays the following:

The “Remote on/off” jumper plug is in and the EasySolar is running, so it’s not that.

The VE.Direct cable between the MPPT and GX is factory installed, and the MPPT can be read from VRM, and the MPPT firmware can be updated, so this cable is allowing communication.

The Dyness battery is Lithium and has a BMS, but whether the battery is fully charged or not, the MPPT output should be used to run essentials and pushed back to non-essentials to minimise grid usage. This is the part that is not working - NO PV power from the MPPT is being sent to the Multi. I can’t determine if the MPPT is cutting off its output (with a relay) or the Multi is cutting off the input (with a relay) from the MPPT??

Settings are as expected:

Yet the Multi is not receiving any MPPT output??

[lxonline (LX)]

Why do you have temperature compensation on with a lithium battery in the settings?

Select the lifepo4 profile and edit the voltages there.

@BambuSky

New: 12 x 585W PV panels

Has this worked? Probably you have a reverse polarity on the pv if it is new and still in the testing stage. It is very common to see voltage with no power.

If it is not that then you may have to temporarily remove the can connection disable bms control for a short test.

[BambuSky]

Should VictronConnect → MPPT → Settings → Load output → Operation Mode be "BatteryLife” or one of the others, listed in Settings at 5.2.2. Load output settings?

[lxonline (LX)]

The load output has nothing to do with battery charging. It is for a separate function.

[MikeD (Mike)]

This can happen if the MPPT was BMS controlled via the Cerbo, but has subsequently lost communications. Somewhere in the settings should be a “reset” button that clears the BMS control.

[BambuSky]

The GX in the EasySolar-II GX 48/5000/70-50 was swapped out and the problem solved. Matter resolved.