SMA Sunny Island 5048 - Page 102

Connecting External Sources SMA Technologie AG
Page 102 SI5048-11:EE4206 Technical Description
The time intervals t1 and t2 are assigned charge states for start-up and stop using the
"#241.03 GnSocTm1Srt", "#241.04 GnSocTm1Stp", "#241.05 GnSocTm2Strt" and
"#241.06 GnSocTm2Stp" parameters. GnSocTm1Strt designates the battery charge
state at which the generator is started during the t1 time and GnSocTm1Stp designates
the charge state at which the generator is switched off during t1. The GnSocTm2Str and
GnSocTm2Stp parameters are similarly defined during the time t2.
If GnTm1Str = GnTm2Str, only t1 is activated!
The graphic displays an example of the settings in case the generator is not to
operate during the night. Between 6 a.m. and 10 p.m., the generator is started
at a charge state (SOC) of 40 % and by contrast, the battery is discharged to 30
% at night (between 10 p.m. and 6 a.m.) before the diesel generator starts.
If the float charging process (see section 13.4 "Charge Control" (Page 88)) is
activated before the cutoff limit (GnSocTm1Stp or GnSocTm1Stp) is reached, the
generator request is disabled again. If a full or equalization charge is active, the
generator is only stopped after this charge is completed and not when "#241.04
GnSocTm1Stp" or "#241.06 GnSocTm2Stp" is reached.
GnSoc Tm2 Stp GnSoc Tm2 Stp
0h 6h
GnTm1Str GnTm2Str
GenSoc Tm1 Stp
18h 24h
GnSoc TM2 Str GnSoc Tm2 Str
GenSoc Tm1 Str
t1
t2
t2
30
40
80
Soc [%]