SMA HM-20 User Manual

20 Application Examples
SMA Solar Technology AG
Operating manualHM-20-BE-en-19136
• exhibits rarely and only briefly a state of charge of 100%.
20.1.2 Setting up Forecast-Based Battery Charging
Preliminary considerations and requirements:
☐ To calculate the expected PV generation, the exact input of the system location (latitude, longitude, altitude) (see
Section10.1.2, page38) as well as the nominal system power (string configuration) (see Section10.2, page40)
are required.
☐ In order to optimize the energy costs, the feed-in tariff and electricity tariff must be entered (see Section10.4.2,
page42) .
The criteria according to which the costs are to be optimized must be set in the optimization target (see
Section10.4.7, page47).
☐ "Learned" energy balance data (at least load profile of the past 14 days) should be available.
☐ If the local grid operator requires a limiting of the active power feed-in (e.g. 70%), this must be specified here (see
Section10.4.3, page43).
☐ As the battery should always be able to start up when energy is needed but also not being produced by the PV
system, it makes sense
– to specify the time period as liberally as possible.
– to configure the battery as an optional load, but with a higher priority than a load with a lower power (e.g.
washing machine or dishwasher) (see Section12.4.7, page82).
☐ So that the battery still has capacities during PV generation peak periods (e.g. midday peak) and curtailment can
be avoided, a percentage value for the state of charge should be specified, from which the
SunnyHomeManager should consider other loads before the battery continues to charge.
Procedure:
1. On the configuration page PV system properties under the tab PV system data check the setting of the PV
system location entry and adjust if necessary.
2. On the configuration page PV system properties under the tab String configuration check the string
configuration and adjust if necessary .
3. On the configuration page PV system properties under the tab Parameters check the following settings and
adjust if necessary:
- Feed-in tariff and electricity tariff
- Limitation of active power feed-in
- Optimization target
4. On the configuration page Load overview and planning select the load and configure the Load properties:
Use the slider to set the Priority of the Load.
5. On the configuration page Device overview select the SunnyHomeManager and call up its Device
properties.
6. In the area SMA Smart Home settings make the following settings:
7. In the EEBUS protocol field place a checkmark: Active
8. If the active power limitation of the system is active, in the field Forecast-based battery charging place a
checkmark: Active

SMA HM-20 Specifications

General

Brand	SMA
Model	HM-20
Category	Measuring Instruments
Language	English