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88 V 1.3 © Studer-Innotec SA next3 Tech manual
• Then come the battery questions with, first, the choice if the battery is communicating or not
is done. If not (simple lead acid batteries for example), then you must enter the type and the
capacity in Ah.
The capacity is asked in Ah, if this is not given directly by the manufacturer this is obtained
with the formula: kWh / voltage x 1000
The non-communicating batteries are generally lead batteries. Choose the appropriate type
in the proposed list. In case of doubt select AGM batteries: it has the less risky levels (lowest
voltages) for any types of batteries, even if the charging would not be optimal for other cases
There is no reduced floating phase or periodic absorption phase for any of those choices by
default.
If you are not satisfied with one of those pre-sets, you can go to the battery menu later and
adjust the levels as you want.
The battery capacity is generally given in Ah for lead batterie and other special types. For a
battery bank composed of many cells, the arrangement gives the total capacity. To
calculate the capacity, only one cell capacity must be considered in a series and not the
sum. If the battery bank is composed of several series/strings in parallel, the total capacity is
the sum of the capacities in parallel.
Per example a with 24 units of a 200Ah/2V cell in series, the total battery bank is 200Ah 48V.
With 72 cells arranged in 3 strings of 24 units, the bank is 600Ah 48V.
To determine the charging current, the most frequently used value is of one fifth of the battery
capacity. Ex. for 500Ah: 500/5 = 100A. See manufacturer indication for details.
o If the battery has a communication BMS (typically for lithium battery), you’ll have to
choose the manufacturer in the list for the next3 to use the proper communication
protocol. Verify that the manufacturer is in the compatible list.
If it is not the case, contact your provider to avoid any mistake which can lead on
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