How do AC couple batteries operate under Dynamic Exports?

As part of efforts to stabilise the grid, some DNSPs are now introducing Dynamic Export limits.  There is an aim to have some level of this program Australia-wide within the next 12-18 months. Rather than a fixed export, your solar system’s export limit changes throughout the day based on real-time grid conditions. While this helps manage network operation, it can lead to unexpected issues... especially when AC-coupled batteries are involved.

AC-coupled batteries charge using excess solar, however when a DNSP dynamically reduces export to zero, the inverter slows generation to ensure it only covers the household loads, this means there’s no extra solar available to allow battery charging. The system is compliant… but the battery remains idle, missing valuable charging opportunities and reducing your energy independence.

Homeowners see the sunshine, but their batteries are not charging. They’re confused, maybe even frustrated — and they’re looking to you for answers. Who Do they Call? ... YOU, The Installer.

The problem? Most apps don’t explain what’s actually happening. They don’t show when the DNSP is limiting export or slowing a system. To the homeowner, it just looks like something’s wrong.

With CATCH Control, Homeowners stay informed. Real-time alerts let them know when the network is in control — and more importantly, their battery still charges. No surprises, no unnecessary callouts, no questioning if systems are working. 

The CATCH Control Solution

CATCH Control fixes this at both the technical and customer experience level.

• CATCH Control monitors total sites energy: solar generation, load and battery state of charge (SOC)

• This allows CATCH Control to monitor the battery’s SOC and solar generation potential, and intelligently determine if there’s available solar to continue charging the battery

• CATCH Control can ramp the solar up just enough to charge the battery — without breaching export limits.

• Once charged, it dials things back to maintain DNSP compliance.
  

And for your customer?

• They get an alert when the DNSP is limiting exports

• Their battery still charges

• They know their system is performing as expected

Why This Matters for Installers

• Keeps systems compliant

• Keeps batteries in charge

• Informs your customers

• Saves you from avoidable site visits.
  

CATCH Control doesn’t just manage energy — it manages expectations.