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3. Energy Management for Photovoltaic Installations 357

Table 11.5 Different Cases of the Available Power in the Second
Configuration of PV/Battery System
DP Load Batteries
Case 1 > Supplied by PV Charging
Case 2 < Supplied by batteries Discharging
Case 3 ¼0 Supplied by PV d

P pv, P load, SOC min, SOC max

Calculate P= P pv -P load

No Yes
P=0

No
P load=P pv
P pv>Pload

Mode 4
SOC>SOC min
Yes No

SOC< SOC max
No
Yes
P pv=0
No
Yes
Mode 1
Mode 2 Mode 3 P load=0
No Yes

Mode 5 Mode8
P pv=0
No Yes

Mode 6 Mode 7

FIGURE 11.6
Energy management strategy of PV/battery system based on four switches.