ESS #1 throttles PV production

Running AC coupled system:

Victron Quattro 10kVA firmware ver: 2653 474

Fronius Primo 4.6kWp firmware ver: 3.13.3-2

BlueNova RacPower 5.2kWh x 2 ver: 1.8

CCGX v.2.57

1. Exporting of Fronius to grid still happening even with zero feed-in etc activated. Happens when the battery is full and the load reduces quickly. This then trips the Conlog meter at the municipality end. This creates a lot of switching between grid and invert. Can this be solved?

2. Running ESS, as soon as the system reaches its 'Minimum SOC (unless grid fails)' and ESS #1 activates it reduces the production of the Fronius and does not charge the battery even when battery is only at 40% and loads of PV available. Is it possible to disable #1 completely? The battery monitor is set to BlueNova.

Regards

Jan

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Alexandra ♦ commented · Jul 23, 2020 at 05:03 PM

@Jan Botha

A trick we use to prevent the overshoot feedback we use here is to be pulling a bit from the grid all the time. So set your grid set point up a bit 200w or 300w found different sites need different amounts. Power always follows the path of least resistance.

The other thing with the fronius as you are attached to the grid the victron can't frequency shift to control the fronius. The ESS #1 is an error message it means there is insufficient PV so to turn it off you need the fronius to step up.

https://www.victronenergy.com/live/ess:design-installation-manual#zero_feed-in_fronius_pv_inverters_only

4.3.11 Zero feed-in (Fronius PV inverters only)

Not sure it you had used this article to troubleshoot.

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