© 2022 Hoymiles Power Electronics Inc. All rights reserved.
25
Single-phase Microinverter HMS-700/800/900/1000-2T-NA
9. Grid Support Details
The HMS-700-2T-NA/HMS-800-2T-NA/HMS-900-2T-NA/HMS-1000-2T-NA Microinverter is a grid support in-
teractive inverter, which is also known as a Grid Support Utility Interactive Inverter. And these microinvert-
ers also comply with California Rule 21. The Grid Support functions are controlled on Hoymiles Monitoring
Platform and the DTU is required in this PV system.
Only an authorized installer is allowed to make Grid profile adjustments by following the
requirements of local electrical utility.
Simultaneous use of Fixed Power Factor and Volt/Var is not supported.
Measurement
Default Tolerance of Measurement
Volts
+/- 1%
Watts
+/- 5%
VAr
+/- 6%
Power factor
+/- 0.05
Hz
+/- 0.1 Hz
Region
Voltage at PCC
(% Nominal
Voltage)
Ride-Through
Until
Operating
Mode
Maximum Trip
Time (s)
Range of
Adjustable
Maximum Trip
Time (s)
High Voltage 2
(HV2)
V
≥
120
N/A
N/A
0.16 sec.
0.16 sec.
High Voltage 1
(HV1)
110 < V < 120
12 sec.
Momentary
Cessation
13 sec.
1-13 sec.
Near Nominal
(NN)
88
≤
V
≤
110
Indefinite
Continuous
Operation
N/A
N/A
Low Voltage 1
(LV1)
70
≤
V < 88
20 sec.
Mandatory
Operation
21 sec.
21 sec.
Low Voltage 2
(LV2)
50
≤
V < 70
10 sec.
Mandatory
Operation
11 sec.
11-21 sec.
Low Voltage 3
(LV3)
V < 50
1 sec.
Momentary
Cessation
1.5 sec.
1.5-2 sec.
Manufacturer’s Stated Accuracy
SA9: Low/High Voltage Ride Through (L/H VRT) and Must Trip Settings
