© 2022 Hoymiles Power Electronics Inc. All rights reserved.
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Single-phase Microinverter HMS-1600C/1800C/2000C-4T
This manual is about Hoymiles 4-in-1 microinverter. With the output power up to 2000 VA, Hoymiles new
HMS-2000C series rank among the highest for 4-in-1 microinverters.
Each microinverter connects to four PV modules at most with dual MPPT and modules-level monitoring, en-
abling greater energy harvest and easier maintenance.
3.4 About Sub-1G Technology
HMS-2000C series of microinverter adopts the new Sub-1G wireless solution which enables more stable com-
munication with Hoymiles gateway DTU. Sub-1G technology is particularly useful for PV microinverters and
is different from 2.4GHz in that it has substantially longer range and better interference suppression perfor-
mance.
Range of Sub-1GHz wireless:
Unlike Wi-Fi or Zigbee which both operate on the 2.4 GHz band, Sub-1GHz op-
erates on the 868 MHz or the 915 MHz band. Generally speaking, Sub-1GHz wireless transmission covers 1.5
to 2 times longer distances than the 2.4GHz spectrum.
Interference:
Sub-1GHz wireless networking can handle interference better. This is because it operates on a
lower frequency, so the communication between the microinverter and the DTU is more stable. As a result, it
is especially useful in industrial or commercial PV power plants.
Lower Power Consumption:
Sub-1GHz wireless communication uses less power than Wi-Fi or Zigbee.
Because of the long range and better interference suppression performance, Sub-1GHz networking is partic-
ularly well-suited for rooftop PV power stations.
About Product
3.3 About 4-in-1 Unit
Microinverters can be divided into 1-in-1, 2-in-1, 4-in-1, etc., depending on how many PV modules are con-
nected to them. This means that the microinverter can connect to one module, two modules and four mod-
ules respectively, as shown below.
Sub-1G
Microinverter
Sub-1G
Sub-1G
3.5 Highlights
- Maximum output power up to 1600/1800/2000 W
- Peak efficiency 96.50%
- Static MPPT efficiency 99.80%, Dynamic MPPT efficiency 99.76% in overcast weather
- Power factor (adjustable) 0.8 leading … 0.8 lagging
- Sub-1G for stronger communication with DTU
- High reliability: NEMA 6 enclosure, 6000 V surge protection
