Fronius Symo Hybrid 3.03-S
Fronius Symo Hybrid 4.03-S
Fronius Symo Hybrid 5.03-S
Max. continuous power
3100W
4100W
5100W
Max. power per phase
1250W
1660W
2080W
Max. current
25A
25A
25A
Switchover time
<60s
<60s
<60s
DESCRIPTION EMERGENCY POWER FUNCTION
The devices of the Fronius Symo Hybrid series are offering the possibility to supply the household with power in the
case of a power failure since autumn 2016. Basic requirements for the full use of the emergency power function are
a Fronius Symo Hybrid Inverter, a connected battery*, a Fronius Smart Meter as well as the implementation of an
emergency current switchover.
Technical data:
For the devices of the Fronius Symo Hybrid series the following technical data apply in emergency power supply:
Discharge power of the battery:
The maximum continuous power is also dependent on the discharge power of the connected battery.
The discharge capacity of the battery is calculated as follows:
Charging / discharging capacity = number of battery modules * 50V * 16A.
Example Solar Battery 7.5 (5 battery modules):
5 pieces * 50V * 16A = 4000W nominal capacity
Attention: the power can vary by up to +/- 20%, depending on the charge level.
The behavior under overload conditions is not affected from this limitation by the discharge power of the battery.
Nominal voltage and overcurrent:
After the device is started, the nominal voltage is immediately available.
In the short term, a maximum peak current of up to 25A per phase is possible. This value applies to all device
alternatives. In this overcurrent case, the voltage is decreased to maintain the rated current. After reduction of the
current (load is switched off), the voltage is raised again to the nominal voltage with a ramp.
* The emergency power function can be used without battery, due to alternating weather conditions shut off and a
output fluctuations can occur.
02/2017 1/9
0,37s
2080W
Overload:
A short-term overload is possible for all devices (see figure 1-3). This refers to the respective power per phase.
The graphs in the diagram below shows, that max. power of the inverter can be exceeded till the red dotted line
gets reached. (e.g. Fronius Symo Hybrid 5.0: 5000W in 0,28s). In this overload case, compared to the overcurrent,
the voltage is kept in the range of the nominal voltage.
Example overload without base load:
Device alternative Fronius Symo Hybrid 5.0
Max. unbalanced load: 2080W
Base load: 0W
Additional load: 4000W
There is a short-term load of 4000W. This can be provided as shown in Figure 1 for a maximum of 0.37 seconds
before the inverter is switched off to prevent thermal damage to the device.
Figure 1: Power per phase according to time for Fronius Symo Hybrid 5.0
02/2017 2/9
0,17s
If devices are already in operation on the phase under consideration before the overload case, the overload
duration reduces according to the previously obtained power (Figure 3-5).
Example of overload:
Device alternative Fronius Symo Hybrid 3.0
Max. unbalanced load: 1250W
Base load: 500W
Additional load: 2500W
There is a short-term load of 3000W. This can be provided as shown in Figure 2 for a maximum of 0.17 seconds
before the inverter is switched off to prevent thermal damage to the device.
Figure 2: Fronius Symo Hybrid 3.0: Example preloading 500W connection of 2500W
02/2017 3/9
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