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This document describes how to setup Energy-storage, Off-grid/Micro-grid and Backup systems with AC-coupled PV, using Fronius PV Inverters. For Fronius information on the same subject, see their MicroGrid flyer.
To make sure that the Fronius PV inverter works well with Victron inverter/chargers, both must be configured with the right 'frequency shift settings':
And the 1:1 rule must be adhered to.
This is a very easy setup. The Fronius Setup Microgrid has been developed in close cooperation with Victron. During commissioning, set the PV Inverter to Setup MG50 (or Setup MG60 for 60 Hz systems). Everything is then pre-configured. The Setup MG settings match the default Victron Assistant settings.
Compatible inverters are:
For new systems the Symo and Eco inverters are recommended for 3~ applications. The Primo inverters are recommended for 1~ applications. Please note that all these inverters are transformerless and therefore PV-Modules that require pole-grounding (on the Plus or Minus pole) cannot be connected.
The use of Fronius Galvo inverters is not recommended anymore for new applications - the Fronius Primo is the best substitute and offers higher efficiency, wider DC voltage range, two MPP trackers and many other features.
When setting up a system, always update both the Fronius and the Victron devices to their latest firmware versions. For the latest Fronius firmware and information how to update use this link: Fronius firmware update
When not pre-ordered with a MicroGrid setup, follow these steps:
Table for settings for 50Hz and 60Hz frequency
More information on adding Assistants is here.
The Victron system can be monitored through Victron VRM Portal if a Color Control GX is present at the site. The Fronius PV inverter data can be integrated into the Color Control GX and therefore also in the VRM portal. So the VRM portal is the recommended monitoring platform also for AC-coupled installations.
However, also Fronius offers an equivalent monitoring solution. The Fronius portal is called Fronius Solar.web. The PV system data can be transfered to the portal if the inverter is equipped with a Datamanager 1.0 or Datamanager 2.0.
The usage of both portals in parallel is possible.
A video instruction how to set up the Datamanager 2.0 + Solar.web can be found here.
It is possible to make a Zero feed-in system with Victron & Fronius. The Venus device will the control the Fronius output power. See the ESS manual, chapter 2.1.3 Fronius Zero feed-in for details.
The first two frequencies do not need to be the same since the Multi actively regulates.
No, the IG inverters cannot be made to work in a MicroGrid system. The appropriate substitute for an IG 30 is the GALVO 2.5-1 or an IG Plus 25V-1 (depending on the desired DC voltage range).
Its locked to the upper limit because of a battery over voltage.
The frequency will reset itself once the system switches back to bulk. For this to happen, the battery voltage needs to drop 0.8V below the configured float voltage. Unless float is configured to 54.8 volts or higher, then the battery voltage needs to drop below 54 volts for the system to switch back to bulk.
Above voltages are for a lithium battery. When configured for other battery types, the voltage needs to drop 5.2V below the configured float voltage. Unless that is configure to 56,8V or higher, then the battery voltage needs to drop below 51.6V for the system to switch back to bulk.
Alternatively, power cycle the system with the rocker switch on the front panel on the inverter/charger.
To prevent this from happening again, check your configured float voltage: setting it lower will prevent the overvoltage condition from happening again.
No, when using a Fronius PV Inverter in a Victron system it is not possible to use the Fronius Smart Meter.
Use any of the Victron supplied Energy Meters instead.
Fronius has a special firmware available, on request, that fixes light flickering issues that occur on certain installations under certain circumstances.
For Fronius PV inverters produced after 2018-week 16, contain the flicker-fix already straight from production.
To update earlier and/or already installed PV Inverters, contact Fronius Tech Support for the file. The required file is fro29130.upd. Which works for all snap-inverter models (Primo, Symo and Eco). There is no, and will be no, fix available for Fronius Galvos.