Additional Functions
SMA America, LLC
102
SI5048U-TUS121440
Technical Description
The graphic shows an example for the settings that minimize the load shedding function at night. From
6:00 a.m. to 10:00 p.m. the load shedding is activated for a charge state (SOC) of 40 %, at nighttime
(from 10:00 p.m. to 6:00 a.m.), however, the charge state of the battery is allowed to go down to
30 % before the load-shedding contactor is activated.
The load shedding function can be assigned a total of two times. Thus in the above listed parameters
the part "Lod1" (see Parameter 242.01 "Lod1SocTm1Str" ‑ "242.06 Lod1Tm2Str") for the first
assigned function, the part "Lod2" (see Parameter 242.07 "Lod2SocTm1Str" − 242.12
"Lod2Tm2Str") for a second, identical function. These two load-shedding functions, which are
dependent on the battery's state of charge, allow for tiered load-shedding in which, by using different
SOC values, different priorities can be given to various load groups.
Define the time intervals t1 and t2:
• Starting time t1: with the ”242.05 Lod1Tm1Str” parameter, set the start time for t1
(and with it the end of t2).
• Starting time t2: with the ”242.06 Lod1Tm2Str” parameter, set the start time for t2
(and with it the end of t1).
• If the time intervals t1 (Lod1Tm1Str) and t2 (Lod1Tm2Str) are consistent with one another,
only t1 will be activated.
Set the battery state of charge at which the time interval t1 or t2 will start/stop:
• The battery state of charge during the t1 interval, the recognition of which will lead to the load-
shedding function being started: Parameter ”242.01 Lod1SocTm1Str”.
• The battery state of charge during the t1 interval, the recognition of which will lead to the load-
shedding function being stopped: Parameter ”242.02 Lod1cTm1Stp”.
Lod1SocTm2 Stp
Lod1SocTm2 Stp
0h
6h
Lod1Tm1Str
Lod1Tm2Str
Lod1SocTm1 Stp
22h
24h
Lod1SocTm2 Str
Lod1SocTm2 Str
Lod1SocTm1 Str
t1
t2
t2
30
40
80
Soc [%]
