1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Power purchasing
over 2.0 kVA
Ⓒ
Ⓓ
Ⓑ
Ⓐ
(Initial mode)
8
9
English
English
Modes and Mechanisms
HOME BACKUP Mode keeps the storage batteries fully charged at all times. Once charged, the system goes on
standby as a safeguard against power outages on the commercial power grid.
The display may not show that the storage batteries are fully charged due to a margin of error.
Use the inverter as an emergency power supply for instances such as rolling blackouts, etc. Use of the Storage
Mode is recommended since it keeps the storage batteries fully charged at all times. If an outage is anticipated
while using the inverter in another mode, you can switch to the Storage Mode ahead of time and minimize the
impact of the outage by having the storage batteries fully charged.
The following three modes are available during grid-tied operation. To switch modes, see the "Remote Controller"
section (Page 10) of the User's Manual.
Surplus PV-generated power is used to charge the storage batteries.
Any power that cannot be stored in the storage batteries is sold.
Power is discharged from the storage batteries. If there is not enough
power coming from the PV system and storage batteries, power is
purchased from the power company.
Power is sold
MAX POWER EXPORT Mode
When power is contracted
by the hour
MAX POWER EXPORT Mode minimizes use of “peak electricity” and
“purchased electricity” by charging the storage batteries at night when
utility rates are low and discharging the stored power during the day
and evening to run connected electric appliances.
ECONOMY Mode
ECONOMY Mode minimizes the amount of purchased electricity
purchased from the grid by utilizing PV-generated power during the day, in the
evening, and at night.
HOME BACKUP Mode
A
Power is
purchased
Surplus PV-generated power is
sold to the commercial power grid.
Power cannot be generated at night or when it rains.
When there is not enough power coming from the PV
system or storage batteries, power is supplied by the
power company.
B
Power is stored
C
Stored power is
discharged
D
Time
Power Generated,
Household Load (kW)
Power Generated,
Household Load (kW)
5
4.5
4
3.5
3
2.5
2
1.5
1
0
0.5
Time
5
4.5
4
3.5
3
2.5
2
1.5
1
0.5
0
Charging up to
max. 1.5 kW
Power Selling
Household Load
Household Load
Solar Power Generation
Solar Power Generation
Nighttime Charging 1.5 kW
Discharge up to
max. 2.0 kVA
Discharge up to
max. 2.0 kVA
Power Selling