High Quality
Siemens Solar has established very high quality standards and as a result our main production plants are certified to ISO 9001. Constant checks and inspections guarantee uniform high quality. Every module that leaves the production line is subject to thorough visual inspections as well as mechanical and electrical tests.
| The SM20 datasheet is also available in the Adobe Acrobat (.PDF) format. |
|---|
| Electrical Parameters (1) | Units of measure | Model: SM20 (12V) |
|---|---|---|
| Maximum power rating | Pmax [Watts] | 20 |
| Minimum power rating | Pmin [Watts] | 18 |
| Rated current | Imp [Amps] | 1.38 |
| Rated voltage | Vmp [Volts] | 14.5 |
| Short circuit current | Isc [Amps] | 1.6 |
| Open circuit voltage | Voc [Volts] | 18 |
| Thermal Parameters | ||
| Nominal operating cell temperature (2) | [°C] | 45 |
| Change of Isc with temperature | – | +0.6mA/°C (+0.04%/°K) |
| Change of Voc with temperature | – | -0.058 Volts/°C (-0.34%/°K) |
| Qualification Test Parameters | ||
| Temperature cycling range | [°C] | -40 to +85 |
| Humidity, freeze, damp heat condition | [% RH] | 85 |
| Maximum system voltage | [Volts] | 20 |
| 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 Parameters | ||
| Number of series cells | 30 | |
| Length | [mm] (in) | 567 (22.3) |
| Width | [mm] (in) | 328 (12.9) |
| Depth | [mm] (in) | 35 (1.4) |
| Weight | [kg] (lbs) | 2.5 (5.6) |
| Warranty (5) | ||
| Power >= 90% of minimum power | [Years] | 10 |
- Determined under standard test conditions (STC): Irradiance = 1000w/m² cell temperature = 25 °C; solar spectral irradiance per ASTM E892 (Air Mass = 1.5).
- Determined under nominal operating conditions (NOC): Irradiance = 800 w/m² ambient temperature = 20 °C; wind speed = 1m/s.
- Qualification Tests performed as per CEC 503 Test Specification, to ensure durability and performance in outdoor conditions.
- Diagonal lifting of module corner with three corners fixed.
- To original consumer purchaser. See full Limited Warranty for all conditions.
Siemens Solar SM20: Efficient Small-Scale Power Solution
Siemens Solar’s SM20 module is a compact, efficient photovoltaic (PV) solution designed for small-scale applications, offering reliable energy for off-grid homes, cabins, RVs, and portable setups. As part of Siemens Solar’s legacy lineup, the SM20 delivers a 20-watt output, blending portability with performance to meet the needs of limited-space or low-power scenarios. This article expands on the original SM20 page from our website, providing a comprehensive guide to its technology, specifications, installation versatility, benefits, and real-world applications, showcasing Siemens Solar’s commitment to delivering sustainable power for small-scale energy needs.
The Role of Small-Scale Solar Solutions
Small-scale solar systems, typically under 10 kW, have become vital for off-grid and portable energy, with the International Renewable Energy Agency (IRENA) reporting their contribution to 15% of global solar capacity by 2023. The SM20, introduced in Siemens Solar’s early portfolio, caters to this growing demand, offering a lightweight, durable option for users needing modest yet dependable power.
“The SM20 is small but mighty,” says Dr. Lars Becker, Siemens Solar’s Product Legacy Specialist. “It’s perfect for those first steps into solar or powering essentials off-grid.”
Why Choose the SM20?
- Compact Design: Ideal for tight spaces or mobility.
- Cost Savings: Saves $75-$150 yearly on fuel costs.
- Sustainability: Reduces emissions by 0.2-0.3 tons per unit annually.
- Simplicity: Easy to install and maintain.
Technology Overview
The SM20 features single crystalline solar cells, a rugged laminate structure, and compatibility with small inverters and battery storage, optimized for basic power needs.
Module Specifications
| Specification | Detail | Benefit |
|---|---|---|
| Power Output | 20 watts | Suitable for small devices |
| Efficiency | 12-15% | Maximizes output in small size |
| Size | 18” x 24” | Portable and space-efficient |
A single SM20 generates 30-40 kWh annually, powering lights, a small fan, or charging devices for 6-8 hours daily with a 1-2 kWh battery.
Installation Versatility
- Rooftop Mount: Fixed on small cabins or sheds.
- Portable Setup: Lightweight for RV or camping use.
- Ground Mount: For temporary or garden installations.
Real-World Applications
Colorado Cabin
An SM20 with a 1 kWh battery powers lights and a radio, saving $100 yearly.
Africa Mobile Unit
Three SM20 panels support a clinic’s basic needs, cutting emissions by 0.25 tons.
Benefits
Saves $75-$150 yearly per unit, provides portable power, and reduces environmental impact.
Future Vision
Siemens Solar plans to evolve small-scale modules like the SM20 with higher efficiency by 2030.
