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Morningstar MeterBus to EIA-485 Adapter (MRC-1)

Model: MRC-1 · SKU: MRC-1

Prepared Nov 12, 2026

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Common specifications

Device type	MeterBus to EIA-485 adapter with isolated 12 V bus powerSource [1]
Communications	MeterBus; EIA-485; ModbusSource [1]
Supported devices	ProStar MPPT and PWM controllers, SunSaver MPPT controller, SunSaver Duo controller, SureSine Classic inverterSource [1]
Ports	MeterBus RJ-11; removable four position EIA-485 terminalSource [1]
Display	Not documented
Power input	From the connected MeterBus device (system battery voltage above 11 V); self-consumption about 8 mA, about 18 mA while communicatingSource [1]
Mounting	35 mm DIN rail (molded tabs)Source [1]
Enclosure	IP20Source [1]
Operating temperature	-40 to 60 °C-40 to 140 °F convertedSource [1]
Weight	0.04 kg0.08 lb convertedCalculatedSource [1]
Dimensions	80 D × 35 D × 23 D mm3.1 D × 1.4 D × 0.91 D in convertedSource [1]
Enclosure volume	0.06 L** Calculated from recorded external dimensions
Warranty term	5 yearsSource [1]

All recorded specifications

Certifications (as printed)	CEDocumented claim Conditions The certification lines as printed (the CE mark beside the certifications heading). Manufacturer claims; no issuer directory was checked. Location: PDF page 1, certifications The certification lines as printed (the CE mark beside the certifications heading). Manufacturer claims; no issuer directory was checked. Location: PDF page 1, certifications Official datasheet · Morningstar Meterbus-to-EIA-485 Adapter datasheet (MS-004186, 07/09/2024) (November 2, 2026 capture) [1]
Communications	MeterBus; EIA-485; ModbusDocumented claim Conditions Printed as "The Meterbus-485 Adapter (Model: MRC-1) converts the Morningstar MeterBus RJ-11 serial interface to a standard EIA-485 interface." and "Can also be used for EIA-485 communications with any third-party hardware that supports Modbus communication". Location: PDF page 1, description and features Printed as "The Meterbus-485 Adapter (Model: MRC-1) converts the Morningstar MeterBus RJ-11 serial interface to a standard EIA-485 interface." and "Can also be used for EIA-485 communications with any third-party hardware that supports Modbus communication". Location: PDF page 1, description and features Official datasheet · Morningstar Meterbus-to-EIA-485 Adapter datasheet (MS-004186, 07/09/2024) (November 2, 2026 capture) [1]
Device type	MeterBus to EIA-485 adapter with isolated 12 V bus powerDocumented claim Conditions Printed as "The Meterbus-485 Adapter (Model: MRC-1) converts the Morningstar MeterBus RJ-11 serial interface to a standard EIA-485 interface." and "By providing isolated 12V power out to a 485 network, this device eliminates the need for an external bus power source in many applications (e.g. a separate 24V-12V converter on 24V systems)." Location: PDF page 1, description Printed as "The Meterbus-485 Adapter (Model: MRC-1) converts the Morningstar MeterBus RJ-11 serial interface to a standard EIA-485 interface." and "By providing isolated 12V power out to a 485 network, this device eliminates the need for an external bus power source in many applications (e.g. a separate 24V-12V converter on 24V systems)." Location: PDF page 1, description Official datasheet · Morningstar Meterbus-to-EIA-485 Adapter datasheet (MS-004186, 07/09/2024) (November 2, 2026 capture) [1]
Dimensions	80 D × 35 D × 23 D mm3.1 D × 1.4 D × 0.91 D in convertedDocumented claim Conditions Printed as "Dimensions 3.2 X 1.4 X .9 in (80 x 35 x 23 mm)"; no axes are named, so the figures are kept in printed order. Location: PDF page 2, Technical Specifications, Dimensions Printed as "Dimensions 3.2 X 1.4 X .9 in (80 x 35 x 23 mm)"; no axes are named, so the figures are kept in printed order. Location: PDF page 2, Technical Specifications, Dimensions Official datasheet · Morningstar Meterbus-to-EIA-485 Adapter datasheet (MS-004186, 07/09/2024) (November 2, 2026 capture) [1]
Enclosure	IP20Documented claim Conditions Printed as "Enclosure IP20". Location: PDF page 2, Technical Specifications, Enclosure Printed as "Enclosure IP20". Location: PDF page 2, Technical Specifications, Enclosure Official datasheet · Morningstar Meterbus-to-EIA-485 Adapter datasheet (MS-004186, 07/09/2024) (November 2, 2026 capture) [1]
Included equipment	RJ-11 cable; removable four position EIA-485 terminalDocumented claim Conditions Printed as "Includes RJ-11 cable and removable four (4) position EIA-485 terminal". Location: PDF page 1, features Printed as "Includes RJ-11 cable and removable four (4) position EIA-485 terminal". Location: PDF page 1, features Official datasheet · Morningstar Meterbus-to-EIA-485 Adapter datasheet (MS-004186, 07/09/2024) (November 2, 2026 capture) [1]
Mounting	35 mm DIN rail (molded tabs)Documented claim Conditions Printed as "Molded tabs for attachment to 35mm standard DIN rail". Location: PDF page 1, features Printed as "Molded tabs for attachment to 35mm standard DIN rail". Location: PDF page 1, features Official datasheet · Morningstar Meterbus-to-EIA-485 Adapter datasheet (MS-004186, 07/09/2024) (November 2, 2026 capture) [1]
Operating temperature	-40 to 60 °C-40 to 140 °F convertedDocumented claim Conditions Printed as "Operating Temperature -40 C to +60 C". Location: PDF page 2, Technical Specifications, Operating Temperature Printed as "Operating Temperature -40 C to +60 C". Location: PDF page 2, Technical Specifications, Operating Temperature Official datasheet · Morningstar Meterbus-to-EIA-485 Adapter datasheet (MS-004186, 07/09/2024) (November 2, 2026 capture) [1]
Ports	MeterBus RJ-11; removable four position EIA-485 terminalDocumented claim Conditions Printed as "The Meterbus-485 Adapter (Model: MRC-1) converts the Morningstar MeterBus RJ-11 serial interface to a standard EIA-485 interface." and "Includes RJ-11 cable and removable four (4) position EIA-485 terminal". Location: PDF page 1, description and features Printed as "The Meterbus-485 Adapter (Model: MRC-1) converts the Morningstar MeterBus RJ-11 serial interface to a standard EIA-485 interface." and "Includes RJ-11 cable and removable four (4) position EIA-485 terminal". Location: PDF page 1, description and features Official datasheet · Morningstar Meterbus-to-EIA-485 Adapter datasheet (MS-004186, 07/09/2024) (November 2, 2026 capture) [1]
Power input	From the connected MeterBus device (system battery voltage above 11 V); self-consumption about 8 mA, about 18 mA while communicatingDocumented claim Conditions Printed as "Meterbus device system battery voltage >11V Self-consumption (MRC-1 power switch ON) ~ 8mA Consumption (while communicating) ~18mA". Location: PDF page 2, Technical Specifications Printed as "Meterbus device system battery voltage >11V Self-consumption (MRC-1 power switch ON) ~ 8mA Consumption (while communicating) ~18mA". Location: PDF page 2, Technical Specifications Official datasheet · Morningstar Meterbus-to-EIA-485 Adapter datasheet (MS-004186, 07/09/2024) (November 2, 2026 capture) [1]
Supported devices	ProStar MPPT and PWM controllers, SunSaver MPPT controller, SunSaver Duo controller, SureSine Classic inverterDocumented claim Conditions Printed as "Compatible with: ProStar MPPT and PWM controllers, SunSaver MPPT controller, SunSaver Duo Controller, SureSine Classic inverter." Location: PDF page 1, description Printed as "Compatible with: ProStar MPPT and PWM controllers, SunSaver MPPT controller, SunSaver Duo Controller, SureSine Classic inverter." Location: PDF page 1, description Official datasheet · Morningstar Meterbus-to-EIA-485 Adapter datasheet (MS-004186, 07/09/2024) (November 2, 2026 capture) [1]
Weight	0.04 kg0.08 lb convertedCalculated37 g / 1000 g/kg = 0.037 kg Conditions Printed as "Weight 37 g (1.3 oz)" (written in kg). Location: PDF page 2, Technical Specifications, Weight Printed as "Weight 37 g (1.3 oz)" (written in kg). Location: PDF page 2, Technical Specifications, Weight Official datasheet · Morningstar Meterbus-to-EIA-485 Adapter datasheet (MS-004186, 07/09/2024) (November 2, 2026 capture) [1]

Warranty

Warranty term	5 yearsDocumented claim Conditions Printed once as "WARRANTY - Five year limited warranty". The datasheet prints no further terms. Location: PDF page 2, WARRANTY Printed once as "WARRANTY - Five year limited warranty". The datasheet prints no further terms. Location: PDF page 2, WARRANTY Official datasheet · Morningstar Meterbus-to-EIA-485 Adapter datasheet (MS-004186, 07/09/2024) (November 2, 2026 capture) [1]

Warranty term

5 yearsDocumented claim

Conditions

Printed once as "WARRANTY - Five year limited warranty". The datasheet prints no further terms.

Location: PDF page 2, WARRANTY

Printed once as "WARRANTY - Five year limited warranty". The datasheet prints no further terms.

Location: PDF page 2, WARRANTY

Official datasheet · Morningstar Meterbus-to-EIA-485 Adapter datasheet (MS-004186, 07/09/2024) (November 2, 2026 capture)

[1]

Certificate records

No records documented.

Sources and revisions

Morningstar Meterbus-to-EIA-485 Adapter datasheet (MS-004186, 07/09/2024) (November 2, 2026 capture)Official datasheet · Revision MS-004186 07/09/2024 · Checked Nov 1, 2026https://www.morningstarcorp.com/wp-content/uploads/datasheet-meterbus-eia-485-adapter-en.pdf