exPANdINg The sTORAge sysTeM
47
© TESVOLT We reserve the right to make technical changes. Version RD.TI.015.E.ENG_Installation_Manual_TS48V_v.C.01 Last revised 06/2020
10 EXPANDING THE STORAGE SYSTEM
The capacity and the charging/discharging power of TESVOLT battery systems can be expanded.
10.1 EXPANDING THE CAPACITY USING THE TESVOLT EXPANSION MODULE
Installing expansion modules
DANGER! Risk of injury from high compensating currents if the expansion and original battery
modules have different states of charge.
If a battery module is installed in a TS 48 V battery storage system and this module’s state of charge
differs from that of the battery modules already present, high compensating currents flow in the event
of contact with existing battery modules and this can result in an electric arc or components becoming
very hot and, consequently, to serious injuries.
WARNING! Possible damage to the unit and/or battery inverter if the expansion and original bat-
tery modules have different states of charge.
If a battery module is installed in a TS 48 V battery storage system and this module’s state of charge
differs from that of the battery modules already present, this can cause damage to the battery mod-
ules or to the APU LV.
NOTE:
Up to 16 battery modules can be connected to one APU LV. If more battery modules are to be
operated in a system, (at least) one extra APU is required. Please note that each APU must have the
same number of battery modules.
1
The new battery modules are supplied with a state of charge (SoC) of approx. 20%. Before you inte-
grate a new battery module into an existing battery system, the existing system must be brought to
the same voltage level. First check state of charge of the new battery modules by carrying out a volt-
age measurement; this must be exactly 50.0 +/- 0.1 V. In any other event, please contact the
TESVOLT Service Line +49 (0) 3491 87 97 - 200 or email [email protected].
2
Adjust the voltage of the original battery modules of the TS 48 V so that it precisely matches voltage of
the new battery modules using the SMA Sunny Island.
3
If necessary, install a cabinet extension in accordance with section “6.2 Fitting a cabinet extension”, page
27.
4
Now prepare the extended cabinet for the electrical components to be fitted in accordance with section
“6.1 Setting up the cabinet”, page 25.
5
Complete the installation of the electrical components in accordance with section “6.3 Installing the
components”, page 30.
6
In the event of a restart, the APU LV queries the number of modules detected via the display. If the
number is correct, confirm this by tapping twice on the marking to the right of the display. For more
information, see section “8 Commissioning”, page 42 et seq.
7
Next, commission the SMA Sunny Island System in accordance with the SMA specifications. Call up the
web interface on the master Sunny Island. The data for the battery capacity in ampere hours must be
adjusted under Unit parameters > “Edit parameters” > “Battery” > “Nominal capacity”. The data for the
battery capacity of your TESVOLT TS 48 V system can be found in ”Table 8.1 Storage capacity as a func-
tion of the number of battery modules”, page 43.
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