SMA sunny home manager User Manual page 19

SMA Solar Technology AG
Function
When used with SMA bat-
tery inverters:
Optimized discharge of
lead-acid batteries
Transmission of SMA En-
ergy Meter data to Sunny Is-
land systems
Transmission of energy me-
ter data to Sunny Backup
systems
* The data is not available in all countries.
** This function is not available in all countries.
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 Sunny Home Manager (SHM) from SMA"
available at http://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.
The Sunny Home Manager avoids derating losses due to limitation of PV power generation by
taking the current self-consumption of the household into account. The Sunny Home Manager helps
to use excess PV power in households directly and increases the self-consumption quota as a result.
For PV systems with SMA battery inverters, the Sunny Home Manager preferentially uses the
derated active power to charge the battery.
User Manual
Explanation
The Sunny Home Manager uses the calculated load profile and the
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.
Using these criteria, the lead-acid battery is conserved while making
optimum use of the battery capacity.
If an SMA Speedwire data module for Sunny Island is installed in
the Sunny Island, the Sunny Home Manager can send SMA En-
ergy Meter data to the Sunny Island system.
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.
3 Product Description
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