Epever XTRA-N Series User Manual page 7

When the controller operates under "Condition 1" or "Condition 2", it will perform
charging according to the actual current or power; at this time, the controller can
operate at the maximum power point of the PV system.
WARNING: If the PV output is not greater than the rated charging power,
but the maximum voltage across the PV array disconnected circuit is
greater than 100V(XTRA **10N) or 150V(XTRA **15N) (at the lowest
ambient temperature), damage to the controller may occur.
Condition 3:
actual power of PV system ＞ nominal charging power of controller
Condition 4:
actual charging current of the PV system ＞ nominal charging current of the controller
When the controller operates under "Condition 3" or "Condition 4", it will perform
charging according to the actual current or power.
WARNING: If the PV output is higher than the rated charging power but
the maximum voltage across the PV array disconnected circuit is higher
than 100V(XTRA **10N) or 150V(XTRA **15N) (at the lowest ambient
temperature), damage to the controller may occur.
According to the "peak sunshine clock diagram", if the output of the PV system
exceeds the rated charging power of the controller, the charging time is extended
according to the rated power so that more energy can be obtained to charge the
battery. In practice, however, the maximum output of the PV array must not exceed
1.5 times the rated charging power of the controller. If the maximum power of the PV
array exceeds too much of the rated charging power of the controller, it will not only
cause destruction of the PV modules, but also increase the voltage of the PV array
disconnected circuit due to the effect of ambient temperature, which may cause a
higher probability of damage to the controller. Therefore, it is very important to
configure the system appropriately. The recommended maximum PV system output
for this controller can be found in the following table
Model
XTRA1210N
XTRA2210N
XTRA3210N
XTRA4210N
XTRA3415N
Rated Rated
charging
current
130 W/12 V
10A
260W/24V
260W/12V
20A
520W/24V
390W/12V
30A
780W/24V
520W/12V
40A
1040W/24V
390W/12V
30A
780W/24V
Max. power of
charging
PV system
performan
ce
195W/12V
390W/24V
390W/12V
780W/24V
580W/12V
1170W/24V
780W/12V
1560W/24V
580W/12V
1170W/24V
7
Max. voltage
of PV open
Circuit
①
92V
②
100V
150 V①