OPERATING PRINCIPLE OF PANELS
PEAK POWER VS POWER DURING ACTUAL USE
Peak Power is measured under Standardized test conditions (STC) : Insolation of 1000W/m², cell
temperature at 25°C.
During real use the panel temperature is at 45°C +/- 2% and the maximum insolation strength is of
850W/m²
A panel of 300W peak only produces 200W in reality (see table below)
Panel
(STC norm)
150W
250W
300W
*Temperature correction = 0.4% / degree above 25°C or 8% loss for 45°C (NOCT)
**Insolation correction = see explanation above
PANEL COMPATIBILITY
UNIMPPT 30/10.12S
!
The maximum panel voltage in open circuit in series (Voc) may not exceed 30V and
and must be at least 17V
Real power with
Real power with
corrected
corrected insolation
temperature
(lossof 8%)*
(loss of 25%)**
140W
230W
275W
1 panel
+
2 panels
+
+
3 panels
Lille
Marseille
Power with
loss due to
if 850W
105W
170W
205W
With 12V battery
www.uniteck.fr
Winter
200W/m²
500W/m²
Charging current
with low battery
wiring
between 10V and
(2 t o5%)
100W
160W
200W
Max 150W
Max 50W (x2)
In parallel
Max 50W (x3)
In parallel
EN
Summer
700W/m²
850W/m²
11V
10A
15A
20A
25/52