Sigenergy Sigen Power Sensor | Three Phase External CT 120A | DIN Rail | RS485 | Solar Import/Export Monitoring
Sigenergy Sigen Power Sensor | Three Phase External CT 120A | DIN Rail | RS485 | Solar Import/Export Monitoring
Three Phase 3 × 120A CT Included ±1% Accuracy Part No: SIG-SENSOR-TP-CT-DH
The Sigenergy Power Sensor TP-CT-DH is a three-phase energy metering device that connects via RS485 to Sigenergy inverters, energy controllers and the SigenStor system — providing real-time, high-accuracy measurement of grid import and export across all three phases. It is the essential component that enables the SigenStor EMS to make intelligent, load-aware decisions: without it, the system cannot see what the home is consuming or exporting, so advanced functions including dynamic load management, solar surplus EV charging, and export limitation are unavailable. Three external 120A split-core current transformers (CTs) are included in the box, making this a complete, ready-to-install metering solution for three-phase residential and light commercial supplies.
What the Power Sensor Enables
The Power Sensor sits at the grid connection point (typically in or adjacent to the consumer unit) and feeds real-time import/export data to the SigenStor Energy Controller via RS485. This measurement is the foundation for a wide range of intelligent energy management functions:
- Dynamic load management — prevents main fuse overload by throttling inverter/charger output in real time
- Solar surplus EV charging (Solar Boost, 100% PV modes) via the Sigen EV AC Charger
- Export limitation — caps grid export to a set threshold (e.g. 0W or 3.68kW) for DNO compliance
- Import limitation — prevents grid draw above a set threshold for demand management
- Self-consumption optimisation — tells the EMS when to charge battery vs export surplus
- AI tariff scheduling — real-time consumption data feeds the mySigen AI energy optimiser
- Accurate energy flow display in the mySigen app — grid import/export, household load, solar generation
- Anti-backflow protection when used with the Sigen Energy Gateway
⚠️ Required for key functions: Dynamic load management and all solar-priority EV charging modes (Solar Boost, 100% PV, PV Storage & Charging) on the Sigen EV AC Charger require a Power Sensor to be installed. Without it, the inverter/controller has no visibility of household consumption and cannot prevent overload or optimise EV charging against solar surplus. Export limitation for DNO/G98 compliance also requires the Power Sensor.
Key Features
Choosing the Right CT Rating
The Power Sensor is available in three CT ratings. Select based on the maximum current expected at the grid connection point, which is typically the DNO fuse / main incomer rating:
| Part No | CT Rating | CT Bore | Typical Application |
|---|---|---|---|
| SIG-SENSOR-TP-CT-DH ★ (this product) | 120A | 16mm | Three-phase homes and small commercial — up to ~83kVA per phase / 120A service |
| SIG-SENSOR-TP-CT300-DH | 300A | larger | Larger commercial premises — up to 300A three-phase supply |
| SIG-SENSOR-TP-CT600-DH | 600A | 36mm | Industrial / large commercial — up to 600A three-phase supply |
For single-phase supplies, see the equivalent single-phase variants: SIG-SENSOR-SP-DH (direct connection, up to 100A) and SIG-SENSOR-SP-CT-DH (with external 120A CT).
Technical Specifications
| Specification | Detail |
|---|---|
| Product Identity | |
| Part No | SIG-SENSOR-TP-CT-DH |
| Datasheet model designation | TP-CT120-DH |
| Brand | Sigenergy |
| Power Supply & Grid Connection | |
| Grid connection type | 3P3W / 3P4W (three-phase three-wire / four-wire) |
| AC input voltage range | 173–480 Vac |
| Nominal AC frequency | 50 / 60 Hz |
| Measurement Accuracy | |
| Voltage accuracy | ±0.5% |
| Current accuracy | ±0.5% |
| Power accuracy | ±1% |
| Frequency accuracy | ±0.2% |
| Data refresh rate | 100ms |
| Communication | |
| Interface | RS485 |
| Baud rate | 9,600 bps |
| Protocol | Modbus RTU |
| General Data — Sensor Body | |
| Dimensions (W × H × D) | 72 × 94.5 × 65mm |
| Weight | 200g |
| Display | LCD (real-time voltage, current, power, frequency) |
| Installation method | DIN Rail 35mm |
| Ingress protection rating | IP51 |
| Operating temperature | -30°C to 60°C |
| Storage temperature | -40°C to 85°C |
| Relative humidity | 0–90% |
| CT Accessories (× 3 supplied) | |
| Number of CTs supplied | 3 (one per phase) |
| CT type | Split-core (clip-on, no disconnection required) |
| Max. operating current per CT | 120A |
| CT inner bore diameter | 16mm |
| CT cable length | 1 metre |
| Weight per CT | 90g |
| Standards | |
| Standard compliance | EN 61010-1:2010, EN 61010-2-030:2010 |
FAQs
Is a Power Sensor always required with a SigenStor system?
Not strictly — the SigenStor will operate for basic solar self-consumption and tariff-scheduled charging without a Power Sensor, using the inverter's own output measurement and a fixed schedule. However, it is required for dynamic load management (preventing fuse overloads), all solar surplus EV charging modes, export limitation for DNO compliance, and for the mySigen app to display accurate household consumption figures. In practice, the Power Sensor is considered essential for any well-functioning installation and most professional installers include it as standard.
Where are the CTs installed?
The three CTs are clipped around the incoming live conductors at the grid connection point — typically on the tails between the DNO cutout fuse and the main consumer unit, or on the main incomer cables inside a distribution board. They must be positioned to measure total import/export across all three phases, on the grid side of the system (before the inverter connection). The 1m CT cables connect back to the sensor body, which mounts on the DIN rail in the consumer unit or an adjacent enclosure.
Do I need the CT120 or a higher-rated CT variant?
For most UK three-phase residential and small commercial installations, the 120A CT (this product) is appropriate. A typical UK three-phase residential supply is 100A per phase — well within the 120A CT rating. If your supply is larger (e.g. a commercial premises with a 200A or 300A three-phase incomer), choose the CT300 or CT600 variant accordingly. If in doubt, check the rating of the DNO fuse or main incomer breaker on each phase.
Original: $340.12
-65%$340.12
$119.04Sigenergy Sigen Power Sensor | Three Phase External CT 120A | DIN Rail | RS485 | Solar Import/Export Monitoring
Three Phase 3 × 120A CT Included ±1% Accuracy Part No: SIG-SENSOR-TP-CT-DH
The Sigenergy Power Sensor TP-CT-DH is a three-phase energy metering device that connects via RS485 to Sigenergy inverters, energy controllers and the SigenStor system — providing real-time, high-accuracy measurement of grid import and export across all three phases. It is the essential component that enables the SigenStor EMS to make intelligent, load-aware decisions: without it, the system cannot see what the home is consuming or exporting, so advanced functions including dynamic load management, solar surplus EV charging, and export limitation are unavailable. Three external 120A split-core current transformers (CTs) are included in the box, making this a complete, ready-to-install metering solution for three-phase residential and light commercial supplies.
What the Power Sensor Enables
The Power Sensor sits at the grid connection point (typically in or adjacent to the consumer unit) and feeds real-time import/export data to the SigenStor Energy Controller via RS485. This measurement is the foundation for a wide range of intelligent energy management functions:
- Dynamic load management — prevents main fuse overload by throttling inverter/charger output in real time
- Solar surplus EV charging (Solar Boost, 100% PV modes) via the Sigen EV AC Charger
- Export limitation — caps grid export to a set threshold (e.g. 0W or 3.68kW) for DNO compliance
- Import limitation — prevents grid draw above a set threshold for demand management
- Self-consumption optimisation — tells the EMS when to charge battery vs export surplus
- AI tariff scheduling — real-time consumption data feeds the mySigen AI energy optimiser
- Accurate energy flow display in the mySigen app — grid import/export, household load, solar generation
- Anti-backflow protection when used with the Sigen Energy Gateway
⚠️ Required for key functions: Dynamic load management and all solar-priority EV charging modes (Solar Boost, 100% PV, PV Storage & Charging) on the Sigen EV AC Charger require a Power Sensor to be installed. Without it, the inverter/controller has no visibility of household consumption and cannot prevent overload or optimise EV charging against solar surplus. Export limitation for DNO/G98 compliance also requires the Power Sensor.
Key Features
Choosing the Right CT Rating
The Power Sensor is available in three CT ratings. Select based on the maximum current expected at the grid connection point, which is typically the DNO fuse / main incomer rating:
| Part No | CT Rating | CT Bore | Typical Application |
|---|---|---|---|
| SIG-SENSOR-TP-CT-DH ★ (this product) | 120A | 16mm | Three-phase homes and small commercial — up to ~83kVA per phase / 120A service |
| SIG-SENSOR-TP-CT300-DH | 300A | larger | Larger commercial premises — up to 300A three-phase supply |
| SIG-SENSOR-TP-CT600-DH | 600A | 36mm | Industrial / large commercial — up to 600A three-phase supply |
For single-phase supplies, see the equivalent single-phase variants: SIG-SENSOR-SP-DH (direct connection, up to 100A) and SIG-SENSOR-SP-CT-DH (with external 120A CT).
Technical Specifications
| Specification | Detail |
|---|---|
| Product Identity | |
| Part No | SIG-SENSOR-TP-CT-DH |
| Datasheet model designation | TP-CT120-DH |
| Brand | Sigenergy |
| Power Supply & Grid Connection | |
| Grid connection type | 3P3W / 3P4W (three-phase three-wire / four-wire) |
| AC input voltage range | 173–480 Vac |
| Nominal AC frequency | 50 / 60 Hz |
| Measurement Accuracy | |
| Voltage accuracy | ±0.5% |
| Current accuracy | ±0.5% |
| Power accuracy | ±1% |
| Frequency accuracy | ±0.2% |
| Data refresh rate | 100ms |
| Communication | |
| Interface | RS485 |
| Baud rate | 9,600 bps |
| Protocol | Modbus RTU |
| General Data — Sensor Body | |
| Dimensions (W × H × D) | 72 × 94.5 × 65mm |
| Weight | 200g |
| Display | LCD (real-time voltage, current, power, frequency) |
| Installation method | DIN Rail 35mm |
| Ingress protection rating | IP51 |
| Operating temperature | -30°C to 60°C |
| Storage temperature | -40°C to 85°C |
| Relative humidity | 0–90% |
| CT Accessories (× 3 supplied) | |
| Number of CTs supplied | 3 (one per phase) |
| CT type | Split-core (clip-on, no disconnection required) |
| Max. operating current per CT | 120A |
| CT inner bore diameter | 16mm |
| CT cable length | 1 metre |
| Weight per CT | 90g |
| Standards | |
| Standard compliance | EN 61010-1:2010, EN 61010-2-030:2010 |
FAQs
Is a Power Sensor always required with a SigenStor system?
Not strictly — the SigenStor will operate for basic solar self-consumption and tariff-scheduled charging without a Power Sensor, using the inverter's own output measurement and a fixed schedule. However, it is required for dynamic load management (preventing fuse overloads), all solar surplus EV charging modes, export limitation for DNO compliance, and for the mySigen app to display accurate household consumption figures. In practice, the Power Sensor is considered essential for any well-functioning installation and most professional installers include it as standard.
Where are the CTs installed?
The three CTs are clipped around the incoming live conductors at the grid connection point — typically on the tails between the DNO cutout fuse and the main consumer unit, or on the main incomer cables inside a distribution board. They must be positioned to measure total import/export across all three phases, on the grid side of the system (before the inverter connection). The 1m CT cables connect back to the sensor body, which mounts on the DIN rail in the consumer unit or an adjacent enclosure.
Do I need the CT120 or a higher-rated CT variant?
For most UK three-phase residential and small commercial installations, the 120A CT (this product) is appropriate. A typical UK three-phase residential supply is 100A per phase — well within the 120A CT rating. If your supply is larger (e.g. a commercial premises with a 200A or 300A three-phase incomer), choose the CT300 or CT600 variant accordingly. If in doubt, check the rating of the DNO fuse or main incomer breaker on each phase.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Three Phase 3 × 120A CT Included ±1% Accuracy Part No: SIG-SENSOR-TP-CT-DH
The Sigenergy Power Sensor TP-CT-DH is a three-phase energy metering device that connects via RS485 to Sigenergy inverters, energy controllers and the SigenStor system — providing real-time, high-accuracy measurement of grid import and export across all three phases. It is the essential component that enables the SigenStor EMS to make intelligent, load-aware decisions: without it, the system cannot see what the home is consuming or exporting, so advanced functions including dynamic load management, solar surplus EV charging, and export limitation are unavailable. Three external 120A split-core current transformers (CTs) are included in the box, making this a complete, ready-to-install metering solution for three-phase residential and light commercial supplies.
What the Power Sensor Enables
The Power Sensor sits at the grid connection point (typically in or adjacent to the consumer unit) and feeds real-time import/export data to the SigenStor Energy Controller via RS485. This measurement is the foundation for a wide range of intelligent energy management functions:
- Dynamic load management — prevents main fuse overload by throttling inverter/charger output in real time
- Solar surplus EV charging (Solar Boost, 100% PV modes) via the Sigen EV AC Charger
- Export limitation — caps grid export to a set threshold (e.g. 0W or 3.68kW) for DNO compliance
- Import limitation — prevents grid draw above a set threshold for demand management
- Self-consumption optimisation — tells the EMS when to charge battery vs export surplus
- AI tariff scheduling — real-time consumption data feeds the mySigen AI energy optimiser
- Accurate energy flow display in the mySigen app — grid import/export, household load, solar generation
- Anti-backflow protection when used with the Sigen Energy Gateway
⚠️ Required for key functions: Dynamic load management and all solar-priority EV charging modes (Solar Boost, 100% PV, PV Storage & Charging) on the Sigen EV AC Charger require a Power Sensor to be installed. Without it, the inverter/controller has no visibility of household consumption and cannot prevent overload or optimise EV charging against solar surplus. Export limitation for DNO/G98 compliance also requires the Power Sensor.
Key Features
Choosing the Right CT Rating
The Power Sensor is available in three CT ratings. Select based on the maximum current expected at the grid connection point, which is typically the DNO fuse / main incomer rating:
| Part No | CT Rating | CT Bore | Typical Application |
|---|---|---|---|
| SIG-SENSOR-TP-CT-DH ★ (this product) | 120A | 16mm | Three-phase homes and small commercial — up to ~83kVA per phase / 120A service |
| SIG-SENSOR-TP-CT300-DH | 300A | larger | Larger commercial premises — up to 300A three-phase supply |
| SIG-SENSOR-TP-CT600-DH | 600A | 36mm | Industrial / large commercial — up to 600A three-phase supply |
For single-phase supplies, see the equivalent single-phase variants: SIG-SENSOR-SP-DH (direct connection, up to 100A) and SIG-SENSOR-SP-CT-DH (with external 120A CT).
Technical Specifications
| Specification | Detail |
|---|---|
| Product Identity | |
| Part No | SIG-SENSOR-TP-CT-DH |
| Datasheet model designation | TP-CT120-DH |
| Brand | Sigenergy |
| Power Supply & Grid Connection | |
| Grid connection type | 3P3W / 3P4W (three-phase three-wire / four-wire) |
| AC input voltage range | 173–480 Vac |
| Nominal AC frequency | 50 / 60 Hz |
| Measurement Accuracy | |
| Voltage accuracy | ±0.5% |
| Current accuracy | ±0.5% |
| Power accuracy | ±1% |
| Frequency accuracy | ±0.2% |
| Data refresh rate | 100ms |
| Communication | |
| Interface | RS485 |
| Baud rate | 9,600 bps |
| Protocol | Modbus RTU |
| General Data — Sensor Body | |
| Dimensions (W × H × D) | 72 × 94.5 × 65mm |
| Weight | 200g |
| Display | LCD (real-time voltage, current, power, frequency) |
| Installation method | DIN Rail 35mm |
| Ingress protection rating | IP51 |
| Operating temperature | -30°C to 60°C |
| Storage temperature | -40°C to 85°C |
| Relative humidity | 0–90% |
| CT Accessories (× 3 supplied) | |
| Number of CTs supplied | 3 (one per phase) |
| CT type | Split-core (clip-on, no disconnection required) |
| Max. operating current per CT | 120A |
| CT inner bore diameter | 16mm |
| CT cable length | 1 metre |
| Weight per CT | 90g |
| Standards | |
| Standard compliance | EN 61010-1:2010, EN 61010-2-030:2010 |
FAQs
Is a Power Sensor always required with a SigenStor system?
Not strictly — the SigenStor will operate for basic solar self-consumption and tariff-scheduled charging without a Power Sensor, using the inverter's own output measurement and a fixed schedule. However, it is required for dynamic load management (preventing fuse overloads), all solar surplus EV charging modes, export limitation for DNO compliance, and for the mySigen app to display accurate household consumption figures. In practice, the Power Sensor is considered essential for any well-functioning installation and most professional installers include it as standard.
Where are the CTs installed?
The three CTs are clipped around the incoming live conductors at the grid connection point — typically on the tails between the DNO cutout fuse and the main consumer unit, or on the main incomer cables inside a distribution board. They must be positioned to measure total import/export across all three phases, on the grid side of the system (before the inverter connection). The 1m CT cables connect back to the sensor body, which mounts on the DIN rail in the consumer unit or an adjacent enclosure.
Do I need the CT120 or a higher-rated CT variant?
For most UK three-phase residential and small commercial installations, the 120A CT (this product) is appropriate. A typical UK three-phase residential supply is 100A per phase — well within the 120A CT rating. If your supply is larger (e.g. a commercial premises with a 200A or 300A three-phase incomer), choose the CT300 or CT600 variant accordingly. If in doubt, check the rating of the DNO fuse or main incomer breaker on each phase.
