16
Product Overview
2.7.4 Peak Shaving Mode
Peak shaving mode is set for leveling out peaks in electricity use. The system is intelligently
controlled to ensure charging takes place during off-peak hours and discharging occurs
during peak hours.
PV and battery pow er the load
Battery
status
Battery
SOC
Working
mode
Purchase electricity Self use
Purchase
electricity
Peak
shaving 1
Peak shaving 2
Store electricity
Charging Standby
Discharging
Charging Standby Discharging Standby Charging
7:00 18:00 23:00
Time Line
9:00
Power
Peak Shaving Mode
(Assuming peak power from 7:00 to 9:00 and 18:00 to 23:00)
Idea: Leveling out peaks in electricity use
The grid charges
the battery
The grid
powers the load
Expected PV
power curve
Load fluctuation
PV powers
the load
PV powers the load
Charge the battery
until SOC reaches
Reserved SOC
The grid
powers the load
Battery powers the load
Grid
consumption
curve
ChargeFromGrid Period
Peakshaving
Period 1
Peakshaving Period 2PVCharge Period
A B C D A
Figure 2-13 Peakshaving mode
Table 2-7 Description of peakshaving mode
Time Period Inverter working status
Period A
• The grid can charge the battery to MaxSOC within the set
ChargePowerLimits. In this period, the battery will not discharge
power.
Period B & D
Grid consumption power < PeakLimits
(PV+grid
→
load)
• The PV and grid will power the load. The battery will not charge or
discharge power.
Grid consumption power
>
PeakLimits
(PV
+
battery+grid
→
load)
• The battery will discharge power for loads and thus reduce the amount
of power purchased from the grid.
Period C
(PV
→
battery
→
load
→
grid)
• The battery does not discharge power. The PV charges the battery up
to the Reserved SOC before supplying power to the loads. Any excess
power beyond the load requirements is fed into the grid.
Note:
MaxSOC: The energy taken from grid to charge the battery. 50% by default, range is 10%-
100%.
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