Installation
SMA
Solar Technology AG
34
SI2012_2224-TEN082311
Technical Description
Batteries must be accommodated in protected rooms, and sufficient ventilation of the installation
location must be ensured. In the case of batteries which are connected to one Sunny Island
exclusively, there is no need for protection against direct or indirect contact, due to the safety low-
voltage.
It is not necessary to install such batteries in a separate battery room, or in a self-contained electrical
facility.
The necessary air volume flow for ventilation of the room which accommodates the batteries is
calculated as per EN 50272-2 as follows:
Sufficient dissipation of explosive gases is not always ensured in the vicinity of the battery. Therefore,
a safety distance must be observed, in the form of an air clearance in which no sparks or smoldering
materials are allowed.
The clearance distance is calculated as follows:
Finally, install the battery bank in accordance with the installation instructions provided by the
battery manufacturer.
Q = 0,05 * n * I
Gas
* C
10
/100 [m³/h]
Q
=
required air flow volume
n
=
Number of cells
I
Gas
=
maximal finishing charge rate
with C
10
as the 10 hour nominal capacity in [Ah].
The cross-sectional area of the ventilation inlets and outlets (in the case of natural ventilation) is
calculated according to the following formula:
A = 28 * Q [cm
2
]
d = 5,76 * (C
10
)
1/3
[cm]
Installation of a battery with liquid eletrolyte.
With closed batteries, installation in an acid-resistant collecting tray is to be provided for
so that, in the event of a fault, leaking electrolyte cannot cause further damage.
