4 Product Description
SMA Solar Technology AG
20
HoMan-IA-en-17
Installation Manual
Limitation of Active Power Feed-In
Local regulations, for example, the Renewable Energy Sources Act (EEG) in Germany, can call for
permanent limitation of active power feed-in for your PV system, that is, a limitation of the active power
fed into the utility grid to a fixed amount or a percentage share of the installed nominal PV system
power. If required, ask your grid operator whether a permanent limitation of the active power feed-in
is necessary and whether you are allowed to use the Sunny Home Manager for this purpose (see the
Manufacturer's Declaration "Feed-In Management In Accordance with the Renewable Energy
Sources Act (EEG) 2012 with SMA Sunny Home Manager (SHM) from SMA" available at
www.SMA-Solar.com). Using an SMA Energy Meter or a suitable feed-in meter, the
Sunny Home Manager monitors the active power that is fed into the utility grid. If the active power
feed-in exceeds the prescribed limit, the Sunny Home Manager limits the PV generation of the
inverters accordingly.
When used with SMA
battery inverters:
Prevention of derating
losses
The Sunny Home Manager prevents derating losses which can arise
due to the limitation of active power feed-in. Taking the PV yield
forecast and the consumption forecast into account, the timing and
duration of battery charging are controlled and the battery charge is
optimized according to the available energy supply, if excess
PV energy cannot otherwise be used.
When used with SMA
battery inverters:
Optimized discharge of
lead-acid batteries
The Sunny Home Manager uses the calculated load profile and the PV
yield forecast to control battery discharge. The battery is discharged
when the following criteria are met:
• It is possible for the battery to be discharged to a point where
sufficient storage capacity is free to absorb the amount of PV
energy forecast for the next battery charge.
• The discharged lead-acid battery can then promptly be charged
with excess PV energy.
The use of these criteria ensures that the lead-acid battery is conserved
while making optimum use of the battery capacity.
Transmission of
SMA Energy Meter data
to Sunny Island systems
If an SMA Speedwire Sunny Island data module is installed in the
Sunny Island, the Sunny Home Manager can send SMA Energy Meter
data to the Sunny Island system.
Transmission of energy
meter data to
Sunny Backup systems
If a BLUETOOTH Piggy-Back Off-Grid is installed in the Sunny Backup,
the Sunny Home Manager can transfer the energy meter data to the
Sunny Backup system.
* Data is not available in all countries
** This function is not available in all countries.
Function
Explanation