Grid Protection Products

Grid Protection Products

The CTP grid box is a turnkey grid protection solution. The CTP grid box is manufactured and pre-programmed to meet the specific requirements of each of Australia’s DNSPs.

The Grid Box is installed between the PV inverters and site’s main switchboard. This provides a “plug and play” grid connection package for solar installers, retailers and PPA providers. We seek to provide products that assist our clients in obtaining grid connections quickly and with minimal delay and cost implications.

Our larger grid boxes for systems more than 100kW include a revenue-grade, NMI approved meter and provide ongoing access to an integrated energy trading platform.

Standard Grid Box Features

  • Approved secondary protection
  • Back-up generator inter-trip
  • Remote monitoring interface
  • Pattern- approved Meter for LGC / PPA (applicable for systems >=165kW)
  • Indicator lamps
  • Indoor / outdoor rated
  • Commissioning test points
  • Optional surge protection

Grid Box Lite Features

  • Made in Australia
  • Plug & Play Protection
  • Cost-Effective
  • Fit for Purpose
  • Pre-programmed
  • Easy Mounting
  • Installer Support
  • Lightweight


Pre-installed and pre-programmed solution, Turn-key protection and metering package, Single point of contact.

High Quality

Designed by experts, customised accordingly to the specific needs of your projects, Expert technical support, Professional customer support.

Technical Reliability

Overall compliant with NER, CER & AS/NZ standard requirements.

Financial Transparency

No hidden costs. Remote LGC meter data access included in pricing until 2030.

Check out the video to learn
more about our Grid Box

Grid Box

All of our grid boxes provide secondary grid protection in line with AS4777.1:2016.
They are available in different series.

Series Secondary Protection Export Limit as per AS4777.1 Inverters and Protection unit in different location*
EX Yes Soft No
EX-PP & SL Yes Soft Yes
NX Yes Soft + Hard No
NX-PP & SL Yes Soft + Hard Yes

* applicable for DNSPs with the requirement to locate the protection relay at the site’s point of supply / multiple inverter locations

AC Capacity <30KW <65KW <100KW <165KW <250KW <400KW <500KW
EX and EX-PP & SL Available across all system sizes
3-Ph String inverters Up to 2 Up to 6 Up to 6 Up to 4* or 8 Up to 6* or 12 Up to 8* or 20 Up to 10* or 24
NX and NX-PP & SL N/A Available across all system sizes
3-Ph String inverters N/A Up to 4 Up to 4 Up to 6* or 8 Up to 6* or 12 Up to 8* or 20 Up to 10* or 24

* versions available for high capacity inverters >40kVA output

Get in touch with us to discuss your requirements!

Get in touch with us to discuss your requirements!

Useful Documents