Growatt / Smart metersSmart meterSingle-phase smart meter
Single-phase meter.Two current transformers, RS485.
Accessories / Metering
SPM-2CT-C
Single-phase smart meter with two current transformers
A DIN-rail smart meter with two clip-on current transformers for Growatt storage inverters. Review the specifications and bring your requirements to VOLFAC.
- Current transformers
- 2
- Max. detection
- 100 A
- Grid type
- 1P2W
- Weight
- 150 g
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Product overview
Two measuring points for retrofit systems.
The SPM-2CT-C measures a single-phase 220–240 V connection with two current transformers of up to 100 A and reports over RS485 (Modbus RTU). Growatt describes it as a retrofit solution: with a MIN 2500-6000TL-XH2, SPH 3-6K-HUB or SPM 8-10K-HU inverter, one transformer sits on the grid side and the other on the AC output of an existing inverter.
- Two 100 A transformersTwo current transformers with 6 m leads; 100 A maximum, 40 mA secondary, 16 mm inner diameter.
- ± 0.5 % accuracyVoltage and current accuracy of ± 0.5 %; energy accuracy of ± 1 %.
- RS485, Modbus RTURS485 at 9,600 bps with a 15 m communication cable.
- DIN-rail mounting100 × 36 × 65.5 mm, 150 g, for DIN-rail mounting.
Technical specifications
Know the details.
SPM-2CT-CGrowattModel SPM-2CT-C
Brand GrowattModel SPM-2CT-C
General data
- Designation on the datasheet
- SPM-2CTA-C-100
- Dimensions (W × D × H)
- 100 × 36 × 65.5 mm
- Weight
- 150 g
- Mounting type
- DIN-rail mounting
- Operating temperature range
- −25 °C to +55 °C
- Storage temperature range
- −40 °C to +70 °C
- Operating humidity
- < 75 %, non-condensing
Power supply
- Power grid type
- 1P2W
- Input voltage range
- 220–240 V
- Frequency
- 50 / 60 Hz
Measurement
- Voltage accuracy
- ± 0.5 %
- Current accuracy
- ± 0.5 %
- Electric energy accuracy
- ± 1 %
Communication
- Interface
- RS485
- Baud rate
- 9,600 bps
- Communication protocol
- Modbus RTU
Accessories
- Communication cable
- RS485 cable, 15 m
- Current transformers
- 2, with 6 m leads
- Maximum detection
- 100 A
- Secondary current
- 40 mA
- Inner diameter
- 16 mm
Compatibility and certification
- Works with
- Growatt MIN 2500-6000TL-XH2, SPH 3-6K-HUB or SPM 8-10K-HU, as a retrofit solution for an existing single-phase PV system
- Certification
- CE, RCM, SAA
Source: Growatt product pageGrowatt — SPM-2CT-C product page and the datasheet (January 2026), which carries the designation SPM-2CTA-C-100.
Downloads
Product documents.
- Technical datasheetSPM-2CT-C · English · PDFSPM-2CT-C (SPM-2CTA-C-100) · English · PDF
- Quick guideSPM-2CT-C · English · PDFSPM-2CT-C (DDSU666) · English · PDF
Request a quotation.Share your quantity and delivery destination. We reply with a quotation for SPM-2CT-C, not an order confirmation.
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