Siemens ST10 solar module: datasheet and specifications
10 Wrated power
15.6 VVmp
21 VVoc
n/aweight
n/rdimensions not recorded
Siemens ST10: product photograph restored from the original low-resolution picture.
The ST10 is the 10 W CIS thin-film module announced with the ST5 in July 1998. It shares the family’s 15.6 V Vmp and 21.0 V Voc, with twice the current (0.64 A). The weight, 5.2 lb (2.4 kg), is identical to the figure printed for the ST40, so one of the two is probably a copy error; no dimensions are recorded.
Electrical data
continuous thin film; CIS thin film.
Parameter
ST10 (12 V)
Rated power Pmax (W)
10
Minimum power Pmin (W)
9
Current at Pmax, Imp (A)
0.64
Voltage at Pmax, Vmp (V)
15.6
Short-circuit current, Isc (A)
0.74
Open-circuit voltage, Voc (V)
21
Derived figures
Quantity
Value
How it was obtained
Voc at −20 °C (ST10 (12 V))
25.5 V
calculated with the datasheet Voc coefficient
Vmp with 60 °C cells (ST10 (12 V))
13.0 V
approximate range; see the note below the table
Rough daily energy
38 Wh
calculated: Pmax × 5 peak-sun-hours × 0.75 system efficiency; a planning figure, not a measurement
The datasheet gives a Voc coefficient of −0.1 V/°C for the whole module. Scaled to the Vmp, a 15.6 V module falls to about 13.0 V with 60 °C cells, below the roughly 14.4 V needed to absorb a 12 V lead-acid battery. Siemens’ own pitch for CIS was battery-charge power in low light. In 5 peak-sun-hours the 12 V version adds roughly 2.4 Ah a day to a 12 V battery (Imp × 5 h × 0.75). The warranty has only the 5-year, 90 % tier.
Full datasheet tables
Thermal
Parameter
Unit
Value
Nominal operating cell temperature (NOC)
°C
47 ± 2
Change of Isc with temperature
.26 mA/°C
Change of Voc with temperature
-0.1 V/°C
Qualification tests
Parameter
Unit
Value
Temperature cycling range
°C
−40 to +85
Maximum system voltage
V
25 (as published; the ST table layout is garbled, confirm on the original)
Wind loading or surface pressure
N/m² (PSF)
2400 (50)
Maximum distortion (4)
degrees
1.2
Hailstone impact withstand (diameter @ velocity)
mm @ m/s (in @ mph)
25 @ 23 (1.0 @ 52)
Physical
Parameter
Unit
Value
Weight
kg (lb)
2.4 (5.2) (identical to the value printed for the ST40: unverified)
Warranty (5)
Parameter
Unit
Value
Power ≥ 90 % of minimum power
years
5
Notes from the datasheet. (1) Electrical values at standard test conditions: irradiance 1000 W/m², cell temperature 25 °C, spectrum per ASTM E892 (air mass 1.5). (2) Nominal operating conditions: 800 W/m², ambient 20 °C, wind 1 m/s. (3) Qualification tests per CEC 503. (4) Diagonal lifting of a module corner with three corners fixed. (5) Warranty applies to the original consumer purchaser; see the full limited warranty for conditions. The tier percentages refer to the minimum power rating (Pmin), not the rated power.
