Hoymiles HM-800 Specifications & Review
The Hoymiles HM-800 is a dual-input microinverter delivering 800W total AC output for two panels, offering a budget-friendly entry into per-panel optimization with Hoymiles' proven RF communication platform.
What Makes the Hoymiles HM-800 Different
The Hoymiles HM-800 Dual Microinverter is a 2-input microinverter delivering 800W total AC output — a competitive dual-input alternative to Enphase and APsystems. Hoymiles is the #3 microinverter manufacturer globally, and their proprietary Sub-1G RF communication protocol provides reliable long-range connectivity between units and the DTU gateway. At 2.3 kg with 2 independent MPPT channels, the HM-800 offers strong power density. The 96.5% peak efficiency, IP67 rating, and 25-year warranty provide competitive specifications at an aggressive price point that typically undercuts Enphase by 20-30% per panel.
Key Specifications
| Brand | Hoymiles |
| Model | Hoymiles HM-800 Dual Microinverter |
| Type | Microinverter |
| Max AC Power | 800W |
| Max DC Power | 1000W |
| Peak Efficiency | 96.5% |
| CEC Efficiency | 96% |
| DC Voltage Range | 16-60V |
| Max Input Voltage | 60V DC |
| Max Input Current | 16A |
| Output Voltage | 240V |
| MPPT Trackers | 2 |
| Monitoring | Hoymiles S-Miles Cloud (WiFi) |
| Communication | Sub-1G RF via DTU |
| Dimensions | 250 x 193 x 35 mm |
| Weight | 2.3 kg |
| IP Rating | IP67 |
| Operating Temperature | -40C to +65C |
| Warranty | 25 years |
| Certifications | UL 1741, IEEE 1547, FCC Part 15 |
Pros & Cons
Pros
- ✓ Dual-input design halves the microinverter count versus single-input alternatives
- ✓ Aggressive pricing makes it one of the most affordable dual microinverters available
- ✓ 25-year warranty provides long-term confidence at the low price point
- ✓ Independent MPPT per channel handles mismatched panels or partial shading
Cons
- ✗ DTU monitoring gateway is a required additional purchase for system monitoring
- ✗ Brand recognition and local installer training lags behind Enphase in the US market
Best For
Budget-conscious residential installations that want dual-input microinverter convenience at the lowest available price
Is the Hoymiles HM-800 Worth It?
The Hoymiles HM-800 delivers 800W of AC output with a peak efficiency of 96.5% and a CEC weighted efficiency of 96%. This places it slightly below the average for microinverters (approximately 97%). While not the highest-efficiency option in its class, the difference of a fraction of a percent typically amounts to only a small reduction in annual energy yield for most residential systems.
The HM-800 includes a industry-leading 25-year warranty. The industry standard for microinverters is 25 years, so this warranty meets the industry benchmark, offering reliable coverage for the expected life of the equipment.
As a microinverter, the HM-800 provides panel-level power optimization and monitoring. Each panel operates independently, so shading or debris on one panel does not drag down the output of others. Microinverters also inherently comply with NEC rapid shutdown requirements, simplifying installation and improving rooftop safety for firefighters and maintenance crews.
Overall, the Hoymiles HM-800 can be a reasonable choice depending on your priorities and budget. Weigh its 96.5% efficiency and 25-year warranty against competing models to determine if it delivers the best value for your specific installation needs.
Real-World Performance
The HM-800 achieves 96% CEC efficiency across normal operating conditions. The Sub-1G RF communication provides reliable monitoring data through the Hoymiles DTU gateway to the S-Miles Cloud platform. Each of the 2 MPPT channels operates independently for per-panel optimization. The -40C to +65C operating range with IP67 protection ensures reliable outdoor performance. Field reliability data from the growing installed base shows competitive failure rates, though the track record is shorter than Enphase's decade-plus of deployment data.
Who Should Buy the Hoymiles HM-800?
System Design Tips
Pair the HM-800 with panels rated 680-950W for optimal DC/AC ratio. The 16A maximum input current across 2 channels accommodates most residential panels. A Hoymiles DTU gateway is required for monitoring. The IP67 enclosure mounts directly behind each panel for weather-resistant outdoor installation.
Price Estimate
The Hoymiles HM-800 Dual Microinverter typically costs $200-$320 per unit (covering 2 panels), putting the per-panel inverter cost at approximately $100-$160. For a 10 kW residential system using 22 panels, total microinverter cost runs approximately $3120-$4160. Total installed system cost is typically $2.80-$3.80/W for microinverter-based residential systems before the 30% ITC.
How the Hoymiles HM-800 Compares
| Model | AC Power | Efficiency | MPPT | Warranty |
|---|---|---|---|---|
| Hoymiles HM-800 (this inverter) | 800W | 96.5% | 2 | 25 yrs |
| APsystems EZ1-M | 800W | 96.5% | 2 | 12 yrs |
| APsystems DS3 | 730W | 96.5% | 2 | 25 yrs |
| APsystems YC600 | 600W | 96.5% | 2 | 25 yrs |
Compare This Inverter
Installation & Compatibility
DC Input Specifications
- DC Voltage Range
- 16-60V
- Max Input Voltage
- 60V DC
- Max Input Current
- 16A
- MPPT Trackers
- 2
- Max DC Input
- 1.0 kW
Microinverters pair with individual panels. Match the panel wattage to the maximum DC input rating for optimal performance.
System Sizing & Environment
- Max AC Output
- 800W
- Max DC Input
- 1.0 kW
- Output Voltage
- 240V
- IP Rating
- IP67
- Operating Temperature
- -40C to +65C
- Dimensions
- 250 x 193 x 35 mm
- Weight
- 2.3 kg (5.1 lbs)
Monitoring & Communication
- - Monitoring: Hoymiles S-Miles Cloud (WiFi)
- - Communication: Sub-1G RF via DTU
- - Certifications: UL 1741, IEEE 1547, FCC Part 15
Frequently Asked Questions
What solar panels are compatible with the Hoymiles HM-800 Dual Microinverter?
The HM-800 works with panels that have Vmp in the 16-60V range and Imp up to 16A per channel. This covers most residential panels from 300W to 500W. For optimal performance, match panels rated at 400-475W per input for a DC/AC ratio of 1.0-1.3.
What is the warranty on the Hoymiles HM-800 Dual Microinverter?
Hoymiles provides a 25-year standard warranty on the HM-800. This is the longest warranty available in the inverter market, matching the expected lifespan of the solar panels themselves.
Can the Hoymiles HM-800 Dual Microinverter work with battery storage?
Microinverters are AC-coupled, so battery storage must be added as an AC-coupled system (like Enphase IQ Battery, Tesla Powerwall, or Franklin WH aPower). The battery connects to the AC side of the electrical panel, not directly to the microinverters.
What type of inverter is the Hoymiles HM-800?
The Hoymiles HM-800 is a microinverter rated at 800W AC output. Microinverters are installed on each individual panel, offering panel-level optimization and monitoring.
What is the CEC efficiency of the Hoymiles HM-800?
The CEC weighted efficiency is 96%, with a peak efficiency of 96.5%. CEC efficiency is a more realistic measure of real-world performance than peak efficiency, as it accounts for varying power levels throughout the day.
How long is the warranty on the Hoymiles HM-800?
The Hoymiles HM-800 comes with a 25-year manufacturer warranty. This is one of the longest inverter warranties available, matching the lifespan of most solar panel warranties.
Is the Hoymiles HM-800 compatible with battery storage?
The Hoymiles HM-800 is a microinverter and does not directly integrate with battery storage. However, you can add an AC-coupled battery system (such as the Enphase IQ Battery or Tesla Powerwall) alongside microinverters. The battery charges from AC power produced by the microinverters or from the grid.
How many panels can the Hoymiles HM-800 support?
The Hoymiles HM-800 is a microinverter designed to pair with a single solar panel (or sometimes two panels on dual-input models). Each panel in your system gets its own microinverter, so the total number of panels is determined by how many microinverters you install, not by a single unit's capacity. The HM-800 is rated for a maximum DC input of 1000W, so it pairs well with panels up to that wattage.
Does the Hoymiles HM-800 have rapid shutdown?
Yes. Microinverters like the Hoymiles HM-800 inherently comply with NEC 2017/2020 rapid shutdown requirements because each unit is mounted at the panel and can be individually de-energized. When the AC supply is disconnected, the microinverter stops converting power within seconds, ensuring rooftop safety.
Is the Hoymiles HM-800 suitable for my system size?
The Hoymiles HM-800 is rated at 800W AC output per unit, making it suitable for pairing with individual panels up to 1000W. Microinverter systems scale easily: simply add one microinverter per panel. This makes the HM-800 suitable for systems of any size, from small 2 kW residential setups to large 20 kW+ arrays, with the flexibility to expand over time.
What monitoring options does the Hoymiles HM-800 offer?
The Hoymiles HM-800 includes Hoymiles S-Miles Cloud (WiFi) monitoring capabilities via Sub-1G RF via DTU communication. With microinverters, you get panel-level production monitoring, allowing you to identify underperforming panels instantly. Most monitoring platforms offer web dashboards and mobile apps for real-time and historical data access. Check with Hoymiles for specific app availability and any subscription requirements for advanced features.
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Last updated: February 2026