Growatt MID TL3-X2 with GridZeno.

Growatt MID TL3-X2 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 VPP V2.01 in the inverter's firmware. 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.

What it requires

VPP V2.01 in the inverter's firmware. Without it, the sale can't be limited.

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 MID TL3-X: the type code 5001. The XL and XL2 models aren't in the type table and are recognised by the registers that answer.

Export limit

Only through the VPP protocol: 30201, when the installer has set 30200 = 1. It needs VPP V2.01.

How it differs from its neighbours

• Growatt MID 10-25KTL3-X: The MID 10-25KTL3-X is read and limited the same way, but is connected in a different COM connector.
• Growatt MID TL3-XH: The MID TL3-XH has a battery and the type code 5400.

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 (16-pin connector)

Pin

A at pin 3 (RS485A1), B at pin 4 (RS485B1)

Where

The round connector marked COM on the underside just below the USB port, between the PV inputs and AC. The same connector is used for the energy meter and DRM, so there may already be wires in it.

See the full installation guide for Growatt MID TL3-X2

GridZeno Dongle for Growatt MID TL3-X2

This one works.

Growatt MID TL3-X2 is the inverter GridZeno has been tested on. Check that your model is under MID 17-25KTL3-X1, 30-40KTL3-X, 10-20KTL3-XL(1), 6-12KTL3-XL2, 15-25KTL3-XL2 and 17-50KTL3-X2. If it still doesn't suit you, you have 100 days' free return.