APsystems QT2 vs Hoymiles HMT-1600-4T-208-NA
The APsystems QT2 edges ahead in this microinverter-vs-microinverter matchup. It delivers 1.4 kW of output. For most installations in this power range, the APsystems QT2 is the stronger choice.
Key Differences
- • APsystems QT2 delivers 1.4 kW AC output while Hoymiles HMT-1600-4T-208-NA delivers 1.6 kW, a 160W difference.
- • Hoymiles HMT-1600-4T-208-NA achieves 96.5% CEC efficiency vs 96.3%.
- • Both carry 25-year warranties.
- • APsystems QT2 has 4 MPPT inputs while Hoymiles HMT-1600-4T-208-NA has 2, affecting panel configuration flexibility.
Specifications Breakdown
Power Output & Efficiency
The APsystems QT2 delivers 1.4 kW AC output at 96.3% CEC efficiency (96.8% peak), while the Hoymiles HMT-1600-4T-208-NA delivers 1.6 kW at 96.5% CEC (96.5% peak). The 160W power difference determines the maximum solar array each inverter can handle. The Hoymiles HMT-1600-4T-208-NA's higher CEC efficiency means it converts 0.2 percentage points more DC solar energy into usable AC electricity. On an average 8 kW system producing 12,000 kWh annually, this efficiency gap translates to approximately 24 kWh more usable energy per year, worth roughly $4 at $0.15/kWh.
MPPT Trackers & Panel Configuration
The APsystems QT2 features 4 MPPT inputs while the Hoymiles HMT-1600-4T-208-NA has 2. More MPPT trackers allow independent optimization of panel strings facing different directions or experiencing different shading conditions. The APsystems QT2 with 4 MPPTs is better suited for complex roof layouts with multiple orientations, while 2 MPPTs are sufficient for a single unshaded array facing one direction. The APsystems QT2 accepts up to 60V DC input with a 16-55V operating range, versus 65V DC and 16-60V for the Hoymiles HMT-1600-4T-208-NA.
Monitoring & Communication
The APsystems QT2 includes APsystems EMA App (WiFi) monitoring with Zigbee / WiFi via ECU communication, while the Hoymiles HMT-1600-4T-208-NA offers Hoymiles S-Miles Cloud (WiFi) via Sub-1G RF via DTU. Different monitoring ecosystems mean different mobile app experiences, data granularity, and integration options with third-party energy management systems. Reliable monitoring is essential for detecting production drops, identifying panel-level issues, and maximizing system uptime over the inverter's lifetime. Both carry IP67 protection ratings for equivalent environmental durability.
Warranty & Reliability
The APsystems QT2 comes with a 25-year warranty while the Hoymiles HMT-1600-4T-208-NA offers 25 years. Matched warranty durations mean equal long-term manufacturer protection. A 25-year warranty fully covers the expected productive lifespan of your solar panels, eliminating the risk of out-of-pocket inverter replacement.
Specification Comparison
| Specification | APsystems QT2 | Hoymiles HMT-1600-4T-208-NA |
|---|---|---|
| Type | microinverter | microinverter |
| AC Power | 1440W | 1600W |
| Peak Efficiency | 96.8% | 96.5% |
| CEC Efficiency | 96.3% | 96.5% |
| MPPT Trackers | 4 | 2 |
| Monitoring | APsystems EMA App (WiFi) | Hoymiles S-Miles Cloud (WiFi) |
| Weight | 3.1 kg | 5.8 kg |
| Warranty | 25 years | 25 years |
5-Dimension Head-to-Head Analysis
1. Power Capacity
Winner: Hoymiles HMT-1600-4T-208-NAThe Hoymiles HMT-1600-4T-208-NA delivers 1.6 kW versus 1.4 kW. The capacity difference is modest but may matter for systems near the power limit.
2. Conversion Efficiency
Winner: Hoymiles HMT-1600-4T-208-NAThe Hoymiles HMT-1600-4T-208-NA achieves 96.5% CEC efficiency versus 96.3%. Every percentage point of efficiency translates to approximately $100-200 in additional energy production over a 25-year system life on an average 8 kW system. The difference is noticeable but not dramatic in total lifetime energy value.
3. Features & Architecture
Winner: APsystems QT2Both are microinverters with APsystems QT2 at 4 MPPTs vs Hoymiles HMT-1600-4T-208-NA at 2. APsystems QT2's additional MPPT trackers provide more flexibility for multi-orientation roofs.
4. Warranty & Reliability
Winner: TieBoth carry 25-year warranties — equal long-term protection.
5. Overall Value
Winner: Hoymiles HMT-1600-4T-208-NAWeighing efficiency, warranty, and power capacity together, the Hoymiles HMT-1600-4T-208-NA delivers the better overall package. Microinverter systems have higher per-watt hardware costs but lower long-term risk due to panel-level redundancy. Get installer quotes for both to compare actual installed costs in your area.
APsystems QT2
The APsystems QT2 is a four-input microinverter that handles four solar panels simultaneously with independent MPPT per channel, delivering the lowest per-panel hardware cost in the microinverter category.
Pros
- + Four-in-one design delivers the lowest per-panel microinverter cost on the market
- + Four independent MPPT trackers ensure optimal performance even with mismatched panels
- + Single AC output connection for four panels dramatically simplifies wiring and reduces installation time
Cons
- - A single unit failure takes four panels offline simultaneously
- - Larger physical footprint may not fit under all panel frame mounting configurations
- - ECU gateway required for monitoring adds to system component count
Hoymiles HMT-1600-4T-208-NA
The Hoymiles HMT-1600-4T-208-NA is a four-input three-phase microinverter designed for North American 208V Delta networks, supporting 320-540W PV modules with native rapid shutdown compliance and Sub-1G wireless communication.
Pros
- + Native 208V three-phase output eliminates the phase-balancing complexity of stacking single-phase microinverters on commercial roofs
- + Four-in-one architecture cuts mounting and AC trunk count by roughly 75% versus single-input microinverters
- + Built-in rapid shutdown conforms with NEC 2017/2020 690.12 without any additional MLPE hardware
- + Sub-1G RF communication is more reliable than 2.4GHz Zigbee in dense commercial RF environments
Cons
- - Requires a Hoymiles DTU gateway for monitoring which is a separate purchase
- - 208V Delta output limits use to commercial three-phase services — not suitable for typical 240V residential split-phase
- - Hoymiles US distributor and installer network is still smaller than Enphase's
Choose APsystems QT2 If...
- ✓ Your roof has shading, multiple orientations, or complex geometry
- ✓ You need 4 independent MPPT trackers for a multi-orientation roof
- ✓ Large residential and small commercial arrays that want microinverter-level optimization at the lowest possible per-panel inverter cost
Choose Hoymiles HMT-1600-4T-208-NA If...
- ✓ Your roof has shading, multiple orientations, or complex geometry
- ✓ You want maximum energy conversion efficiency to minimize power losses
- ✓ Your system size requires 2 kW+ of inverter capacity
- ✓ Small-commercial 208V three-phase rooftop solar installations using 320-540W panels that need microinverter-level optimization and built-in rapid shutdown
Our Recommendation
Both the APsystems QT2 and Hoymiles HMT-1600-4T-208-NA are excellent inverter options, and the margin between them is narrow. The APsystems QT2 wins 1 of 5 comparison dimensions by a slim margin. Your decision may come down to local pricing, installer availability, and which specific performance metrics matter most for your project. Either product is a solid investment.
Frequently Asked Questions
Which is better, APsystems QT2 or Hoymiles HMT-1600-4T-208-NA?
The APsystems QT2 edges ahead in this microinverter-vs-microinverter matchup. It delivers 1.4 kW of output. For most installations in this power range, the APsystems QT2 is the stronger choice.
Which inverter is more efficient?
The APsystems QT2 achieves 96.3% CEC efficiency (96.8% peak) versus the Hoymiles HMT-1600-4T-208-NA at 96.5% CEC (96.5% peak). Hoymiles HMT-1600-4T-208-NA converts more DC solar power to usable AC electricity. CEC efficiency is the more realistic measure, accounting for varying power levels throughout the day.
Can APsystems QT2 or Hoymiles HMT-1600-4T-208-NA work with battery storage?
The APsystems QT2 is a microinverter without built-in battery management. The Hoymiles HMT-1600-4T-208-NA is a microinverter without built-in battery management. Both require an AC-coupled battery system (like Tesla Powerwall) for storage, or replacement with a hybrid inverter.
Which has a better warranty?
The APsystems QT2 offers 25 years versus 25 years for the Hoymiles HMT-1600-4T-208-NA. Both offer identical warranty terms. Paid warranty extensions are typically available from both manufacturers.
Which inverter type is better: microinverter or microinverter?
Both are microinverters, so the comparison comes down to specifications, brand ecosystem, and pricing rather than architecture. Compare efficiency, warranty, monitoring quality, and installer support when choosing between these two microinverters.
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Last updated: February 2026