SMA
Solar Technology AG
Connecting External Sources
Technical Description
SI2012_2224-TEN082311
139
Load-dependent Start
The generator can be requested for support in case of increased power consumption. This function
can be switched on or off (default) using the "234.09 GnPwrEna" parameter. The function is only
effective if the "234.01 GnAutoEna" parameter is simultaneously set to On.
The load limit for the request and the generator stop is configured using the "234.10 GnPwrStr" and
"234.11 GnPwrStp" parameters. The averaging time used to calculate an average value for the
consumer power can be set using "234.12 GnPwrAvgTm". This prevents temporary power
consumption peaks of a few seconds from causing a load-dependent generator start.
If the generator has been started load-dependently, it will run for the generator minimum runtime. If,
once this time has expired, the average power is below the cutoff limit, the generator is stopped
again.
Information
If the float charging process (see section 12.4 "Charge Control" (Page 122)) is activated
before the cutoff limit (GnSocTm1Stp or GnSocTm2Stp) 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 "234.04 GnSocTm1Stp" or "234.06
GnSocTm2Stp" is reached.
Multiple-phase system
Only the total consumer power of all phases is monitored. Individual phases in a multi-
phase system are not monitored.
The consumer power is calculated using the inverter power ("111.01 TotInvPwrAt"
parameter) and generator power ("131.01 TotExtPwrAt" parameter).
