Sensors & Sending Units

Temperature sensors, CTs, and sending units improve charge accuracy and consumption monitoring. Install battery temperature sensors near the bank (not on the charge controller) and use CTs as directed by your monitor or inverter manual.

Which sensor do I need?

Most shoppers on this page are looking for current transformers (CTs) that plug into a monitoring gateway so they can see household consumption alongside solar production.

Enphase CT-200-SPLIT

The CT-200-SPLIT enables consumption monitoring with a metered Enphase Envoy. Enphase typically requires two CT-200 units (one per line) on a 120/240V split-phase service. Always follow the Envoy installation guide for CT orientation and breaker placement.

Gateway vs sensor

  • Gateway (Envoy, TAP, Cloud Connect, COMMS-KIT) — the communications hub. Shop Gateways & Communication.
  • Sensor / CT — the measurement accessory that feeds the gateway. That is this collection.
Do I need CTs if I only care about solar production?

Often no. Many Enphase IQ systems report production through the Envoy without consumption CTs. Add CT-200 when you want to see home load / net energy in Enlighten.

Where are battery shunts and Victron-style monitors?

Shunt-based battery monitors belong in Shunts & Battery Monitors when ACTIVE stock is available. Call 877-878-4060 if you need a SOC monitor recommendation for your bank.

Need a bill of materials for Envoy + CTs? Call altE at 877-878-4060.

Temperature sensors, CTs, and sending units improve charge accuracy and consumption monitoring. Install battery temperature sensors near the bank (not on the charge controller) and use CTs as directed by your monitor or inverter manual.

Which sensor do I need?

Most shoppers on this page are looking for current transformers (CTs) that plug into a monitoring gateway so they can see household consumption alongside solar production.

Enphase CT-200-SPLIT

The CT-200-SPLIT enables consumption monitoring with a metered Enphase Envoy. Enphase typically requires two CT-200 units (one per line) on a 120/240V split-phase service. Always follow the Envoy installation guide for CT orientation and breaker placement.

Gateway vs sensor

  • Gateway (Envoy, TAP, Cloud Connect, COMMS-KIT) — the communications hub. Shop Gateways & Communication.
  • Sensor / CT — the measurement accessory that feeds the gateway. That is this collection.
Do I need CTs if I only care about solar production?

Often no. Many Enphase IQ systems report production through the Envoy without consumption CTs. Add CT-200 when you want to see home load / net energy in Enlighten.

Where are battery shunts and Victron-style monitors?

Shunt-based battery monitors belong in Shunts & Battery Monitors when ACTIVE stock is available. Call 877-878-4060 if you need a SOC monitor recommendation for your bank.

Need a bill of materials for Envoy + CTs? Call altE at 877-878-4060.