Studer NEXT3 User Manual

Studer Innotec SA
next3
42 V 1.3 © Studer-Innotec SA next3 Tech manual
the same orientation and the same shading (if there is some) must be connected in the same
string or there will be a risk of important mismatching losses. These combinations in series and
in parallel must be carried out according to the voltage and current limits of the next3 MPPT
inputs. An example is provided below for a single MPPT string (example with 310W modules,
60 cells, 41Voc).
In the case of a 310W module with 60cells between 10 and 20 modules are recommended.
21 modules in series are possible in hot countries but should be avoided in cold countries due
to the increasing voltage at low temperatures. The open circuit voltage must be carefully
checked with temperature coefficients given by the PV modules manufacturer. 9 modules
could be theoretically sufficient to start the inverter but in real conditions this could provide
too little voltage.
When two strings are in parallel on one MPP channel, there can be up to maximum 17
modules in series order to avoid PV production capping. Up to 21 modules can be used with
a high probability of capping.
In total between 10 (3.1kWp) and 84 modules (26kWp 4x 21modules) can be connected,
giving a high flexibility for dimensioning the energy system.
5.4.2 Connection
The two MPPT with each 2 connections are situated below the next3:
N° modules in a
string
1 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
Voc (STC) [V] 41 287 328 369 410 451 492 533 574 615 656 697 738 779 820 861 902
P dc (STC) [W] 310 2170 2480 2790 3100 3410 3720 4030 4340 4650 4960 5270 5580 5890 6200 6510 6820
Vmpp NOCT [V] 30 210 240 270 300 330 360 390 420 450 480 510 540 570 600 630 660
P dc (NOCT) [W] 230 1610 1840 2070 2300 2530 2760 2990 3220 3450 3680 3910 4140 4370 4600 4830 5060
Two strings
in parr on
one MPPT
P dc (NOCT) with
two modules in
parrallel [W]
460 3220 3680 4140 4600 5060 5520 5980 6440 6900 7360 7820 8280 8740 9200 9660 10120
P dc (NOCT) with
two modules in
parrallel [W]
460 3220 3680 4140 4600 5060 5520 5980 6440 6900 7360 7820 8280 8740 9200 9660 10120
P dc (STC) with two
modules in parrallel
[W]
460 3220 3680 4140 4600 5060 5520 5980 6440 6900 7360 7820 8280 8740 9200 9660 10120
One string
Two strings in parr
on one MPPT

Studer NEXT3 Specifications

General

Brand	Studer
Model	NEXT3
Category	Industrial Equipment
Language	English