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MARSTEK CT002 Smart Meter

MARSTEK CT002 smart meter on the DIN rail of a home breaker panel at night, with the energy app on a phone
CT002 smart meter in a home breaker panel, paired with the MARSTEK app · Silvera Solar Power (AI-generated scene, official product design)

What it is: the CT002 is a DIN-rail smart energy meter with current-sensor inputs that measures household power in real time on up to three phases (it also works on single-phase). It reports over Wi-Fi / Bluetooth to the MARSTEK app and to compatible MARSTEK storage, which uses the readings to decide when to charge or discharge.

Who it's for: every VENUS E 3.0 or VENUS E Mini customer who wants Self-Consumption (store surplus solar, cover household load, anti-feed-in) or AI Optimization. Both modes need a CT/meter.

100 AMax current per phase
1 or 3Phases
±1%Accuracy (V and I)
<2 WPower use
Wi-Fi + BT 5.2Connectivity

Best for​

  • Enabling Self-Consumption on VENUS E: the unit discharges when the CT sees load and charges when it sees solar export.
  • Anti-feed-in / zero-export setups with VENUS E three-phase total compensation.
  • Monitoring total and per-phase power in the MARSTEK app.

Key features​

From the CT002 datasheet (page 1):

  • Avoid energy wastage with real-time monitoring.
  • Easy to install; suitable for most home distribution boxes (DIN-rail form factor).
  • Bluetooth / Wi-Fi connections; control power with the smart app.
  • Better compatibility with MARSTEK products.
  • Three-phase power sampling, also applicable to single-phase.

From the VENUS E manuals:

  • The VENUS E 3.0 and VENUS E Mini are "fully compatible with MARSTEK's own CT002 and CT003 meters", supporting Self-Consumption and AI Optimization.
  • System diagrams show the CT002 at the main panel, giving "Anti Feed-in, 100% Self-consumption Guaranteed".
  • VENUS E error code 5D2, CT connection abnormality: check that the CT is properly connected to the home network and that the network is stable. See VENUS E troubleshooting.

Product views​

CT002 front with reset button and status LED
Front: reset button and status LEDs
CT002 side showing voltage input terminals VA VB VC VN
Voltage input terminals (VA, VB, VC, VN)
CT002 current sensor connection terminals IA IB IC IN
Current sensor connections (IA, IB, IC, IN)

Specifications​

Source: CT002 Smart Meter datasheet, spec page (transcribed from the rendered image).

SpecificationValue
ModelCT002
Wi-Fi protocol802.11b/g/n (20)
Bluetooth5.2
RF band2.4 GHz
Power supply (AC)100–260 V, 50/60 Hz
Supply voltage deviation±10%
Overvoltage level (VA VB VC VN)CAT II, 3 × 280 VAC
Device power consumption<2 W
Voltage measurement (RMS)100–260 V
Measuring voltage frequency50 Hz / 60 Hz
Voltage measurement accuracy±1%
Maximum single-phase measurement current100 A
Current measurement accuracy±1% (5–100 A)
Dimensions65.4 × 26.5 × 83 mm
Weight0.2 kg
Enclosure colourBlack
Enclosure materialPlastic
Operating temperature-20 °C to 45 °C

The e-Catalog describes the CT002 as a "three-phase smart energy meter with up to 100 A per phase", product dimension about 6.5 × 8.3 × 2.6 cm. That is consistent with the datasheet.

Works on the Philippine grid

The CT002 power supply and measurement range is 100–260 V, 50/60 Hz, which covers the Philippine 220 V / 60 Hz grid.

Not specified in the source set

The datasheet does not list the CT clamp type, number of clamps in the box, or cable lengths, and no CT002 installation manual is in the Drive source set. The datasheet links to the product manual by QR code. Get that manual before installing, and do not guess wiring from the marketing images.

Price (SRP)​

The CT002 is not listed on the current SRP flyer in Drive. Ask Silvera Solar Power for pricing and whether it is bundled with VENUS E. See the price list.

A MARSTEK Philippines CT002 flyer shown in the 5 October 2026 training lists ₱4,500 (from ₱5,000) and a 10-year warranty. It is not in the Drive SRP flyer yet, so confirm with Silvera Solar Power before quoting.

Installation & safety​

  • The CT002 wires into the home distribution box: voltage inputs VA / VB / VC / VN (CAT II, 3 × 280 VAC) and current-sensor inputs IA / IB / IC / IN.
  • This is work on live terminals inside the distribution box. The VENUS E manuals say to turn off power before installing and not to install or remove cables while energised. They also require that only qualified professionals or properly trained personnel install, operate or maintain the system, and that all electrical connections comply with local electrical codes. The MARS I PLUS and V6000 manuals also say users must not tamper with the smart meter or CT after professional installation.
  • Follow the CT002 product manual (QR code on the datasheet) for clamp orientation and phase assignment.
  • Operating temperature -20 °C to 45 °C. The CT002 uses 2.4 GHz Wi-Fi. The VENUS E manual's code 5D2 says to check that the CT is properly connected to a stable home network.

Single-phase installation with VENUS E 3.0​

Most Philippine homes are single-phase. These steps are from the MARSTEK Philippines technical training of 5 October 2026 ("CT002 Single-Phase Technical Information and Wiring Guide"). They are training material, not the CT002 manual, so a qualified electrician does the work and follows the manual where it differs.

Before you start
  • Wi-Fi: the CT002 needs a strong 2.4 GHz signal where it is mounted. Keep it within 5 m of the router with few obstructions; the training says to mount it outside the panel box so the metal box does not block the signal.
  • Clamp position: the CT must sit on the grid side only, before all loads, any AC-coupled solar inverter and the battery system.
  • Clamp direction differs from the MARS I PLUS. On the CT002 the arrow points from grid to load. The MARS I PLUS manual says its own CT arrow points toward the grid. Check which CT you are installing.
1

Prepare the supply wire

Use 2.0 mm² THHN wire for the CT002 supply. On single-phase, connect only VA (live) and VN (neutral); leave VB and VC unconnected.

2

Tap the supply

Turn off the breaker you will tap. Loosen the load-side terminal bolt of that breaker, insert the CT002 supply wire and tighten. A protective switch or breaker upstream lets the meter be isolated for maintenance.

3

Clamp the CT

Put the clamp around the live grid conductor only, with the arrow pointing toward the load. Close it fully.

4

Connect the clamp

Plug the clamp into terminal IA. On single-phase, always use IA only. Connect all voltage and current wires before energising.

5

Power up

Switch the CT002's supply breaker on. The device's green light should turn on.

6

Pair in the MARSTEK app

In the MARSTEK app, Add device and search for the CT002. Then, on the VENUS E 3.0 home page, tap CT (lower left) and choose the CT002 from the list. The CT indicator on the VENUS E lights up when the CT002 is connected.

Sources​