Growatt MOD TL3-X3 with GridZeno.

Growatt MOD TL3-X3 on the compatibility list, updated 31 October 2026.

• Live overview of solar, consumption and gridAll subscriptions · Grid and consumption require an energy meter at the grid connection.
  Works
• Battery state of chargeAll subscriptions · requires a battery · The grid inverter has no battery.
  Not possible
• Stop selling at negative pricesSmart and Pro · Requires the installer to have turned export limiting on in the inverter. GridZeno only lowers a limit that's already set.
  Works
• Charge from the grid when power is cheapSmart and Pro · requires a battery
  Not possible
• Discharge the battery when power is expensivePro · requires a battery
  Not possible

Works: tested and measured on real hardware.

A grid inverter without a battery: GridZeno reads it and lowers the export limit at negative prices.

Battery

None. The inverter is a grid inverter without a battery, so there's nothing to charge or sell from.

Stop selling at negative prices

The inverter's export limit is set quarter by quarter by the selling price, but only where the installer has turned export limiting on. GridZeno only lowers a limit that's already set and never turns it on or off.

Grid and consumption

Requires an energy meter at the grid connection that the inverter reads.

Manual

When the control is on Manual, the dongle changes nothing on the inverter. It reads, and if GridZeno has changed something, it puts the inverter's own settings back, including your own charge limits.

The dongle reads it as a MOD TL3-X without a battery: the type code 5002, or no type code when the range that answers fits.

Export limit

123 in 0.1 %, when the installer has turned limiting on in 122.

How it differs from its neighbours

• Growatt MOD TL3-X: The MOD TL3-X and TL3-X2 are read and limited the same way, but are connected with pins 3 and 4 in a round 16-pin COM connector.

From the dongle's firmware and our notes on each inverter, not from the datasheet.

Wires in the inverter's terminal plug. Approx. 30 minutes.

Port

COM (4-pin connector)

Pin

A at pin 1 (RS485A1), B at pin 2 (RS485B1)

Where

The round connector marked COM on the underside next to the USB port: to the left of it on the 3-15K and to the right of it on the 17-33K. The same connector is used for the energy meter, so there may already be wires in pins 3 and 4.

See the full installation guide for Growatt MOD TL3-X3

GridZeno Dongle for Growatt MOD TL3-X3

This one works.

Growatt MOD TL3-X3 is the inverter GridZeno has been tested on. Check that your model is under MOD 3000-15KTL3-X3 and MOD 17K-33KTL3-X3. If it still doesn't suit you, you have 100 days' free return.