Recommendations For Dimensioning The System; Dimensioning The Battery; Dimensioning The Inverter; Dimensioning The Generator - Studer XTH 3000-12 User Manual

4.3 R
ECOMMENDATIONS FOR DIMENSIONING THE SYSTEM

4.3.1 Dimensioning the battery

The battery capacity is dimensioned according to the requirements of the user – that is 5 to 10
times its average daily consumption. The discharge depth of the battery will therefore be limited
and the service life of the battery will be extended.
On the other hand, the Xtender must have a battery capacity that is large enough to be able to
take full advantage of the performance of the equipment. The minimum capacity of the batteries
(expressed in Ah) is generally dimensioned in the following way: five times the rated power output
of the Xtender / the battery voltage. For example, the model XTH 8048 must have a battery of a
minimum capacity of 7000*5/48=730 Ah (C 10). Because of the inverter's extreme overload
capacity, it is often recommended that this value be rounded up. An under-dimensioned battery
may lead to an accidental and undesired stopping of the Xtender in the event of high instances of
use. This stoppage will be due to a voltage that is insufficient on the battery, subject to a strong
discharge current.
The battery will be selected with regard to the greatest value resulting from the calculations set out
above.
The battery capacity determines the adjustment of the configuration {1137} "battery charge
current". A value between 0.1 and 0.2 x C batt. [Ah] (C10) enables an optimum charge to be
guaranteed.
The method proposed below is strictly indicative and in no way constitutes a guarantee
of perfect dimensioning. The installer is solely responsible for good dimensioning and
installation

4.3.2 Dimensioning the inverter

The inverter is dimensioned in such a way that the rated power output covers the power of all the
consumers which will be used at the same time. A dimensioning margin of 20 to 30% is
recommended to guarantee that the Xtender will work well in an ambient temperature of more
than 25 °C.

4.3.3 Dimensioning the generator

The power output of the generator must be the same or more than the average daily power.
Optimally, it should be two or three times this power. Thanks to the smart boost function it is not
necessary to over-dimension the generator. Indeed, the loads those are temporarily higher than
the power of the generator will be supplied by the inverter. Ideally it should not have a power
output by phase that is less than half of the power of the Xtender(s) present at this phase.
The power available downstream of the inverter when the generator is working is the
same as the sum of the two powers.

4.3.4 Dimensioning the renewable energy sources

In a hybrid system, the alternative energy sources such as the solar generator, wind power and
small hydropower should, in principle, be dimensioned in such a way as to be able to cover the
average daily consumption.
User manual V.3.1.0
STUDER Innotec
Xtender
13