Growatt MAX 185-253KTL3-X HV

Compatibility

Documented MAX monitoring starting map

Growatt’s manufacturer-authored V1.24 protocol lists MAX/TL3-X and MAX 1500 V families, with common serial identity and first-group state, AC power and frequency registers. It does not enumerate every newer suffix. Use it as a best-effort starting revision: compare the returned serial and live values with the nameplate and local display once before expanding the point set.

MAX 185KTL3-X HV, 216KTL3-X HV, 250KTL3-X HV or 253KTL3-X HV on an 800 V class site, per the July 2025 datasheet. The installation manual covers a wider 175-253 kW family; do not import its 175 kW variant into this datasheet scope. Record exact firmware, COM terminal type, logger and country grid configuration.

Connect it with

• 
  Modbus Interface ZMB-3X
  From €399 ex VAT Configure Modbus Interface
• 
  Gateway ZGW-20
  From €899 ex VAT Configure Gateway

Models

Specifications

Growatt’s July 2025 MAX 185-253KTL3-X HV datasheet identifies four 800 V nominal AC ratings: 185, 216, 250 and 253 kW. Their MPPT counts are 9, 9, 12 and 15 respectively, with two PV strings per tracker. The DC maximum is 1500 V, so string and protection design require the exact column and site conditions.²

Exact models

185, 216, 250 and 253KTL3-X HV in the July 2025 datasheet²

Nominal AC voltage

800 V three-phase; published range 640-920 V depends on country grid standard²

Nominal AC output

185 / 216 / 250 / 253 kW by exact model²

PV trackers

9 / 9 / 12 / 15 MPPTs by exact model; two strings per MPPT²

DC input

1500 V maximum; 30 A maximum input and 50 A maximum short-circuit current per MPPT²

Serial communications

RS485 standard, with RS485-1 IN/OUT and RS485-2 terminals; USB standard^2, 3

Optional accessories

PLC, 4G or GPRS are listed as optional; verify deployed logger and function^2, 3

Enclosure

IP66; -30 to +60°C operating range with installation and derating conditions²

Mass

95 kg at 185/216 kW, 99 kg at 250 kW, 109 kg at 253 kW²

Interface

Documented measurements and integration boundaries for MAX 185-253KTL3-X HV.

• The manual maps standard RS485-1 IN/OUT and a separate RS485-2 pair in a 16-pin communications terminal. It gives a 32-device, 500 m, 38,400-baud monitoring example; confirm the actual terminal form and site design.
• ShineMaster and USB Shine modules are separate monitoring accessories. The V1.24 map provides inverter-side RTU starting reads; it does not identify an accessory’s local TCP endpoint.
• V1.24 first-group registers provide state, AC power and frequency. Its 1500 V extension covers additional channels; use the exact channel layout before adding individual string monitoring.
• An 800 V nominal AC inverter belongs to the site’s engineered collector and transformer design. It is not a direct 400 V building feeder substitute.
• The older wider-family manual groups 230-253 kW models as fifteen-MPPT units, while the July 2025 four-model datasheet specifies twelve MPPTs for 250KTL3-X HV and fifteen for 253KTL3-X HV. Resolve a 250 kW installation against its nameplate and supplied drawing rather than transferring the manual’s generic grouping.
• Inverter generation does not measure point-of-common-coupling import or export. Preserve the separate grid meter and existing grid-control owner.
• The manual also names demand-response contacts. No export, active/reactive-power or protection write is approved here.

Setup

1. Verify the installed power class

   Record the complete MAX nameplate, 800 V collector design, country grid setting and firmware. The 250 and 253 kW variants differ in MPPT count and mass; do not use a family maximum as a single-model specification.

2. Map the existing communications chain

   The manual shows RS485-1 IN/OUT and RS485-2 pairs, plus optional Shine modules and ShineMaster. Identify which port and logger the site uses before adding a reader or assuming that PLC data is available on an Ethernet network.

3. Read identity, state and AC output

   Use the configured slave address and framing; the manual’s monitoring example runs at 38400 baud. Read FC03 holding 23–27 for the serial, then FC04 input 0 for state and 35–37 for AC power/frequency. Exact PDUs and integer decoding appear below. Compare with the local display; check polarity, addressing and bus ownership first if the serial fails.

4. Keep grid control separate

   Document any plant controller, export limiter, point-of-common-coupling meter and grid operator settings. A monitoring path should leave demand-response contacts and active/reactive-power control with their commissioned owner.

5. Validate measured values

   Compare the starting serial, state, AC power and frequency with the local display or existing manager. Preserve unavailable responses; a separate revenue or grid meter measures import/export.

Common questions

How many MPPTs does MAX 253KTL3-X HV have?

The July 2025 datasheet gives fifteen for the 253 kW model. It gives twelve for 250 kW and nine each for 185 and 216 kW. Use the exact nameplate column.²

Does the RS485 terminal mean Edge can read Modbus registers?

The connector establishes the wiring; Growatt V1.24 additionally documents the MAX register layout. Use RS485-1 with one polling master and the bounded serial/power procedure below. Compare the starting values locally before adding points.^3, 4

Can the optional PLC link be treated as Ethernet?

No. Growatt lists PLC as an optional communication method. Confirm the installed accessory, logger and data handoff before designing an IP integration.^1, 2

Does inverter power equal grid export?

No. This inverter measures its own production. The point-of-common-coupling meter and plant controller establish site import/export and control boundaries.³