Selectronic Australia

Selectronic Certified Grid-Tie Inverters

Selectronic Certified LogoSelectronic Managed AC Coupling

To utilise all of the possibilities of an SP PRO, it needs to work with a Selectronic Certified grid-tie inverter.

These inverters contain hardware and software to enable direct communication with the SP PRO. This means that the SP PRO has control of the flow of energy from the solar panels with as fine control as 0.1% steps. This is known as Managed AC Coupling technology which was developed by Selectronic in 2010, and cannot be achieved with a generic grid-tie inverter.

The Selectronic Certified grid-tie inverter can be considered as an AC MPPT. By creating an AC Bus, an AC coupled system will allow PV energy to be efficiently used directly by the load with excess PV energy going back through the multi-mode SP PRO to charge batteries or export to the grid.

A maximum of five (5) Selectronic Certified inverters can be controlled by any single SP PRO, but the total AC output of the combined grid-tie inverters must not exceed twice the continuous power rating of the SP PRO, or the SP PRO 30 second rating, whichever is smallest.

When using a Selectronic Certified grid-tie inverter, site consumption and generation data will be logged by the SP PRO including the AC coupled solar production.

When to use Selectronic Certified grid-tie inverters

We recommend a Selectronic Certified grid-tie inverter for maximum system efficiency and flexibility, however one must be used with an SP PRO in the following situations:

  • Off-grid AC coupling
  • Solar Hybrid AC coupling with Fixed Export Limit requirements (with or without batteries)
  • Solar Hybrid AC coupling where twice the PV to SP PRO rating is required

Want solar but not ready to add battery storage?

Using a Selectronic Certified grid-tie inverter allows you to have a grid-tie solar power system today and add a fully managed battery storage system at a later date. This is a cost-effective, future ready solution.

Benefits of using Selectronic Certified:

  • The total AC output of the combined grid-tie inverters can be up to twice the continuous power rating of the SP PRO or the SP PRO 30 second rating, whichever is smallest.
  • Maximise battery life via precise charging control
  • No frequency variations to the loads.
  • All system data is captured by SP LINK software
  • Full support from Selectronic

Currently we have Selectronic Certified inverters from both ABB and Fronius.

BR0012_06 Selectronic Certified Managed AC Coupling November 2018 (PDF 1.58 MB)

Selectronic Certified Grid Tie inverters

ABB Logo

ABB Solar Inverters

Model Number AC Output No of MPPTs MPPT range
UNO-3.3-DM-SCERT 3.3 kW 2 90 - 580V DC
UNO-4.0-DM-SCERT 4.0 kW 2 90 - 580V DC
UNO-5.0-DM-SCERT 5.0 kW 2 90 - 580V DC
UNO-6.0-DM-SCERT 6.0 kW 2 90 - 580V DC

UNO-DM-3.3-4.0-4.6-5.0-TL-PLUS (PDF 220 kB)
UNO-DM-6.0-TL-PLUS (PDF 178 kB)

Installation Notes:

IN0053_02 SP PRO ABB UNO Managed AC Coupling Installation Notes (2.81 MB)


Fronius Logo

Fronius Inverters

Image of Fronius Primo Model Number
AC Output
No of MPPTs
MPPT range
Primo 3.0-1 WLAN-SCERT
200-800V DC
Primo 4.0-1 WLAN-SCERT
210-800V DC
Primo 5.0-1 WLAN-AUS SCERT ¹
4.6kW ¹
240-800V DC
Primo 6.0-1 WLAN-SCERT
240-800V DC
Primo 8.2-1 WLAN-SCERT
270-800V DC

¹ This is an Australian version of the Primo 5.0. The AC nominal output is rated at 4.6 kW and the maximum output is rated at 5000 VA

Installation Notes:

IN0049_05 Installing a Fronius Primo SCERT in a Managed AC Coupled system (3.57 MB)

ATTENTION: Before updating Firmware or changing Country Code, refer to this document:

TN0072_01 Fronius Firmware Update Configuration (665 kB)