User Manual of Solar Intelligent Energy System (SIES)
TBB Power Confidential Page
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4.6.2.3 Series-Parallel Connection
As the name implies, both the series and parallel connections are used in order to configure a bigger
battery bank. As a result, both the overall voltage and amp-hour rating are increased comparing to
individual battery. This way of connection is common in all kinds of battery-inverter system.
The batteries with lower voltage are firstly connected in series to obtain a string of batteries with the
expected higher voltage, and then multiple strings are connected in parallel to increase the total
capacity (amp-hour) of battery bank.
The lengths of connection cables among individual batteries should be same, in order
to assure the resistance is equal in each battery.
For example: The lengths the connection cables between BAT I to BAT II, BAT III to
BAT IV should be the same. And, the negative cable should be pulled out from the
negative terminal of BAT II, the positive cable should be pulled out from the positive
terminal of BAT III (
Figure 18).
Figure 18 Series-Parallel Connection
4.7 Connection of external cables
The external connection terminal was located at bottom of Smart Box with marking.
