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Hoymiles Combiner Box HMS-C
Model: HMS-C · SKU: Not documented
Prepared Nov 12, 2026
Common specifications
| Device type | AC combiner box with an integrated Hoymiles gateway (DTU-Plus), smart meter and Eaton BR series load center, for HMS series microinvertersSource [1, 2] |
|---|---|
| PV string inputs | 5Source [1, 2] |
| Voltage rating | 120/240 V AC, 60 HzSource [1] |
| Current rating | 110 ASource [1] |
| Included breakers or fuses | 2-pole 10 A circuit breaker for the communication module; the five branch circuit breakers are not includedSource [1, 2] |
| Enclosure | Outdoor, IP65/NEMA type 3R, polycarbonateSource [1, 2] |
| AC / DC rating | ACSource [1] |
| Interrupt rating | Not documented |
| Safety listing | UL1741Source [1, 2] |
| Mounting | Not documented |
| Weight | |
| Dimensions | |
| Enclosure volume | 40 L** Calculated from recorded external dimensions |
| Warranty term | 5 yearsSource [1, 2] |
All recorded specifications
| AC / DC rating | ACDocumented claim ConditionsPrinted as "System voltage 120/240 VAC, 60 Hz". Location: PDF page 2, Technical Specifications, Electrical Specifications, System voltage Printed as "System voltage 120/240 VAC, 60 Hz". Location: PDF page 2, Technical Specifications, Electrical Specifications, System voltage |
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| Accuracy | PV production metering ±0.5% (ANSI C12.20, revenue grade); grid metering ±1.0% (ANSI C12.1)Documented claim ConditionsPrinted in the datasheet and on the page as "Integrates a smart meter for revenue-grade PV production metering with accuracy at ±0.5% (ANSI C12.20) and grid metering with accuracy at ±1.0% (ANSI C12.1)"; the datasheet's accessories print "Production CT Pre-wired revenue-grade solid core CT, accurate up to 0.5% Grid CT Two consumption metering clamp CTs, shipped with the box, accurate up to 1.0%" and "Metering ports Up to two Grid CTs, and two Production CTs". Location: Model description; PDF page 2, Technical Specifications, Accessories, Production CT and Grid CT Printed in the datasheet and on the page as "Integrates a smart meter for revenue-grade PV production metering with accuracy at ±0.5% (ANSI C12.20) and grid metering with accuracy at ±1.0% (ANSI C12.1)"; the datasheet's accessories print "Production CT Pre-wired revenue-grade solid core CT, accurate up to 0.5% Grid CT Two consumption metering clamp CTs, shipped with the box, accurate up to 1.0%" and "Metering ports Up to two Grid CTs, and two Production CTs". Location: Model description; PDF page 2, Technical Specifications, Accessories, Production CT and Grid CT Official datasheet · Hoymiles Combiner Box datasheet (Region: North America, V202406) (November 2, 2026 capture)Official product page · Hoymiles Combiner Box HMS-C product page, North America (November 2, 2026 capture) [1, 2] |
| Certifications (as printed) | UL 1741; CAN/CSA C22.2 No. 107.1; FCC CFR 47 part 15 B; ICES-003 Issue 7Documented claim ConditionsPrinted as "Compliance Combiner Box UL 1741, CAN/CSA C22.2 No. 107.1, FCC CFR 47 part 15 B, ICES-003 Issue 7" (the power supply and meter carry their own rows). Manufacturer claims; no issuer directory was checked. Location: PDF page 2, Technical Specifications, Compliance, Combiner Box Printed as "Compliance Combiner Box UL 1741, CAN/CSA C22.2 No. 107.1, FCC CFR 47 part 15 B, ICES-003 Issue 7" (the power supply and meter carry their own rows). Manufacturer claims; no issuer directory was checked. Location: PDF page 2, Technical Specifications, Compliance, Combiner Box |
| Communications | Sub-1G to HMS series microinverters; Ethernet 802.3, 10/100 M to S-Miles Cloud; 4G LTE to S-Miles Cloud; RS485 (Modbus)Documented claim ConditionsPrinted as "Internet Connection Options Ethernet 802.3, 10 M / 100 M Adaptive Ethernet, Cat 5E (or Cat 6) UTP Ethernet cable (not included), for connecting to the S-Miles Cloud via the internet Mobile connect 4G LTE, for connecting to the S-Miles Cloud via the internet RS485 Support for data transmission using Modbus protocol"; datasheet and page print "Integrates a communication module that collects microinverter data via Sub-1G (compatible with HMS series microinverters)" and "Supports transmitting microinverter data to the S-Miles Cloud via 4G and Ethernet". Location: PDF page 2, Technical Specifications, Internet Connection Options; model description Printed as "Internet Connection Options Ethernet 802.3, 10 M / 100 M Adaptive Ethernet, Cat 5E (or Cat 6) UTP Ethernet cable (not included), for connecting to the S-Miles Cloud via the internet Mobile connect 4G LTE, for connecting to the S-Miles Cloud via the internet RS485 Support for data transmission using Modbus protocol"; datasheet and page print "Integrates a communication module that collects microinverter data via Sub-1G (compatible with HMS series microinverters)" and "Supports transmitting microinverter data to the S-Miles Cloud via 4G and Ethernet". Location: PDF page 2, Technical Specifications, Internet Connection Options; model description Official datasheet · Hoymiles Combiner Box datasheet (Region: North America, V202406) (November 2, 2026 capture)Official product page · Hoymiles Combiner Box HMS-C product page, North America (November 2, 2026 capture) [1, 2] |
| Current rating | 110 ADocumented claim ConditionsPrinted as "Rating 110 A"; the same table prints "Eaton BR series busbar rating 125 A", "Maximum continuous current rating (input from PV) 88 A" and "Maximum total branch circuit breaker rating (input) 110 A". Location: PDF page 2, Technical Specifications, Electrical Specifications, Rating Printed as "Rating 110 A"; the same table prints "Eaton BR series busbar rating 125 A", "Maximum continuous current rating (input from PV) 88 A" and "Maximum total branch circuit breaker rating (input) 110 A". Location: PDF page 2, Technical Specifications, Electrical Specifications, Rating |
| Device type | AC combiner box with an integrated Hoymiles gateway (DTU-Plus), smart meter and Eaton BR series load center, for HMS series microinvertersDocumented claim ConditionsThe datasheet prints "This Combiner Box includes the DTU and smart meter, enabling functions such as data collection, data transmission, real- time monitoring, and Export Power Limit." and "Combiner Box HMS-C Compatible with HMS series microinverters"; datasheet and page print "Integrates a communication module that collects microinverter data via Sub-1G (compatible with HMS series microinverters)". Location: PDF page 1, description and model description; product page introduction The datasheet prints "This Combiner Box includes the DTU and smart meter, enabling functions such as data collection, data transmission, real- time monitoring, and Export Power Limit." and "Combiner Box HMS-C Compatible with HMS series microinverters"; datasheet and page print "Integrates a communication module that collects microinverter data via Sub-1G (compatible with HMS series microinverters)". Location: PDF page 1, description and model description; product page introduction Official datasheet · Hoymiles Combiner Box datasheet (Region: North America, V202406) (November 2, 2026 capture)Official product page · Hoymiles Combiner Box HMS-C product page, North America (November 2, 2026 capture) [1, 2] |
| Dimensions | 200 D × 500 W × 400 H mm7.87 D × 19.7 W × 15.7 H in convertedDocumented claim ConditionsPrinted as "19.67 × 15.75 × 7.87 inch. (500 × 400 × 200 mm)", width by height by depth. Location: PDF page 2, Technical Specifications, Mechanical Data, Dimensions (W × H × D) Printed as "19.67 × 15.75 × 7.87 inch. (500 × 400 × 200 mm)", width by height by depth. Location: PDF page 2, Technical Specifications, Mechanical Data, Dimensions (W × H × D) |
| Enclosure | Outdoor, IP65/NEMA type 3R, polycarbonateDocumented claim ConditionsPrinted as "Enclosure rating Outdoor, IP65/NEMA type 3R, Polycarbonate Construction"; datasheet and page print "NEMA type 3R enclosure, UV resistance". Location: PDF page 2, Technical Specifications, Mechanical Data, Enclosure rating Printed as "Enclosure rating Outdoor, IP65/NEMA type 3R, Polycarbonate Construction"; datasheet and page print "NEMA type 3R enclosure, UV resistance". Location: PDF page 2, Technical Specifications, Mechanical Data, Enclosure rating Official datasheet · Hoymiles Combiner Box datasheet (Region: North America, V202406) (November 2, 2026 capture)Official product page · Hoymiles Combiner Box HMS-C product page, North America (November 2, 2026 capture) [1, 2] |
| Included breakers or fuses | 2-pole 10 A circuit breaker for the communication module; the five branch circuit breakers are not includedDocumented claim ConditionsPrinted as "Load Center Eaton load center, 125 A capacity, with one circuit breaker assigned for powering the communication module, and the other five circuit breakers (not included) designated for branch circuits Communication Module Breaker Circuit breaker, 2-Pole, 10 A"; datasheet and page print "Supports up to five 2-Pole branch circuits for 240 VAC plug-in breakers (not included)". Location: PDF page 2, Technical Specifications, Accessories, Load Center and Communication Module Breaker Printed as "Load Center Eaton load center, 125 A capacity, with one circuit breaker assigned for powering the communication module, and the other five circuit breakers (not included) designated for branch circuits Communication Module Breaker Circuit breaker, 2-Pole, 10 A"; datasheet and page print "Supports up to five 2-Pole branch circuits for 240 VAC plug-in breakers (not included)". Location: PDF page 2, Technical Specifications, Accessories, Load Center and Communication Module Breaker Official datasheet · Hoymiles Combiner Box datasheet (Region: North America, V202406) (November 2, 2026 capture)Official product page · Hoymiles Combiner Box HMS-C product page, North America (November 2, 2026 capture) [1, 2] |
| Operating temperature | -25 to 50 °C-13 to 122 °F convertedDocumented claim ConditionsPrinted as "-13°F to 122°F (-25°C to 50°C)". Location: PDF page 2, Technical Specifications, Mechanical Data, Ambient temperature range Printed as "-13°F to 122°F (-25°C to 50°C)". Location: PDF page 2, Technical Specifications, Mechanical Data, Ambient temperature range |
| PV string inputs | 5Documented claim ConditionsPrinted as "Branch circuits (solar) Supports up to five 2-Pole Eaton BR series distributed generation (DG) breakers (not included), such as BR210, BR215, BR220, and BR230"; the product page prints "Supports up to five 2-Pole branch circuits for 240 VAC plug-in breakers (not included)". Location: PDF page 2, Technical Specifications, Electrical Specifications, Branch circuits (solar) Printed as "Branch circuits (solar) Supports up to five 2-Pole Eaton BR series distributed generation (DG) breakers (not included), such as BR210, BR215, BR220, and BR230"; the product page prints "Supports up to five 2-Pole branch circuits for 240 VAC plug-in breakers (not included)". Location: PDF page 2, Technical Specifications, Electrical Specifications, Branch circuits (solar) Official datasheet · Hoymiles Combiner Box datasheet (Region: North America, V202406) (November 2, 2026 capture)Official product page · Hoymiles Combiner Box HMS-C product page, North America (November 2, 2026 capture) [1, 2] |
| Safety listing | UL1741Documented claim ConditionsPrinted in the datasheet and on the page as "UL1741 listed". Manufacturer claim; no issuer directory was checked. Location: PDF page 1, features; product page Features Printed in the datasheet and on the page as "UL1741 listed". Manufacturer claim; no issuer directory was checked. Location: PDF page 1, features; product page Features Official datasheet · Hoymiles Combiner Box datasheet (Region: North America, V202406) (November 2, 2026 capture)Official product page · Hoymiles Combiner Box HMS-C product page, North America (November 2, 2026 capture) [1, 2] |
| Voltage rating | 120/240 V AC, 60 HzDocumented claim ConditionsPrinted as "System voltage 120/240 VAC, 60 Hz". Location: PDF page 2, Technical Specifications, Electrical Specifications, System voltage Printed as "System voltage 120/240 VAC, 60 Hz". Location: PDF page 2, Technical Specifications, Electrical Specifications, System voltage |
| Weight | 9.6 kg21 lb convertedDocumented claim ConditionsPrinted as "21.2 lbs. (9.6 kg)". Location: PDF page 2, Technical Specifications, Mechanical Data, Weight Printed as "21.2 lbs. (9.6 kg)". Location: PDF page 2, Technical Specifications, Mechanical Data, Weight |
Warranty
| Warranty term | 5 yearsDocumented claim ConditionsPrinted in the datasheet and on the page as "5-year limited warranty". Neither prints warranty terms. Location: PDF page 1, features; product page Features Printed in the datasheet and on the page as "5-year limited warranty". Neither prints warranty terms. Location: PDF page 1, features; product page Features Official datasheet · Hoymiles Combiner Box datasheet (Region: North America, V202406) (November 2, 2026 capture)Official product page · Hoymiles Combiner Box HMS-C product page, North America (November 2, 2026 capture) [1, 2] |
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Certificate records
No records documented.
Sources and revisions
- Hoymiles Combiner Box datasheet (Region: North America, V202406) (November 2, 2026 capture)Official datasheet · Revision V202406 · Checked https://w3oss.hoymiles.com/uploadfile/1/202506/2581a5fc11.pdf
- Hoymiles Combiner Box HMS-C product page, North America (November 2, 2026 capture)Official product page · Checked https://www.hoymiles.com/us/products/combiner-box-hms-c.html