Siemens Reliability
When it comes to reliable and environmentally-friendly generation of electrical power from sunlight, solar modules from Siemens provide the perfect solution. Manufactured in compliance with the most stringent quality standards, they are designed to withstand the toughest environmental conditions and are characterized by their long service life.
| The SP18 datasheet is also available in the Adobe Acrobat (.PDF) format. |
|---|
| Electrical Parameters (1) | SP18 (12V) | SP18 (6V*) | |
| Maximum power rating | Pmax [Watts] | 18 | – |
| Minimum power rating | Pmin [Watts] | 16 | – |
| Rated current | Imp [Amps] | 1.1 | 2.1 |
| Rated voltage | Vmp [Volts] | 17.0 | 8.5 |
| Short circuit current | Isc [Amps] | 1.2 | 2.4 |
| Open circuit voltage | Voc [Volts] | 21.7 | 10.9 |
| Thermal Parameters | ||
| Nominal operating cell temperature (2) | [°C] | 45 |
| Change of Isc with temperature | – | +2.06mA/°C (+0.04%/°K) |
| Change of Voc with temperature | – | -0.077 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] | 1000 per ISPRA (EC), 600 per UL 1703 |
| 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 | count | 36 |
| Length | [mm] (in) | 633 (24.9) |
| Width | [mm] (in) | 275 (10.8) |
| Depth | [mm] (in) | 34 (1.3) |
| Weight | [kg] (lbs) | 2.7 (5.9) |
| Warranty (5) | ||
| Power >= 90% of minimum power | [Years] | 10 |
- 1. 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.
- * If the designer chooses to use the 6-volt version in a high voltage array configuration, the designer must install custom large bypass diodes and heat sinks around every 6-volt parallel string.
Siemens Solar SP18: Versatile Low-Power Module for Off-Grid Use
Siemens Solar’s SP18 module is a versatile, low-power photovoltaic (PV) solution delivering an 18-watt output, designed for off-grid applications such as telecom, marine, RV, and small residential systems. Part of Siemens Solar’s SP-series, the SP18 offers dual-voltage compatibility (6V/12V) and a rugged design, making it ideal for diverse, low-energy needs. This article expands on the original SP18 page from our website, providing an in-depth guide to its technology, specifications, installation flexibility, benefits, and real-world applications, showcasing Siemens Solar’s ability to deliver efficient, sustainable power for specialized off-grid scenarios.
The Emergence of Low-Power Solar Modules
Low-power PV modules like the SP18, typically under 20 watts, have become essential for niche off-grid applications, supporting telecom relays, marine navigation, and portable setups. By 2023, micro-solar systems contributed significantly to remote energy access, per IRENA data. The SP18, introduced in Siemens Solar’s early SP-series, meets this demand with its compact size and dual-voltage flexibility.
“The SP18 is small but adaptable,” says Dr. Elena Fischer, Siemens Solar’s Low-Power Specialist. “It’s a go-to for off-grid reliability.”
Why the SP18?
- Low-Power Output: 18 watts for minimal needs.
- Cost Savings: Saves $50-$100 yearly on fuel costs.
- Sustainability: Reduces emissions by 0.2-0.3 tons per unit yearly.
- Dual Voltage: Supports 6V or 12V systems.
Technology Overview
The SP18 features single crystalline cells, a durable anodized aluminum frame, and a laminated design, optimized for low-power, off-grid use.
Module Specifications
| Specification | Detail | Benefit |
|---|---|---|
| Power Output | 18 watts | Suits small loads |
| Efficiency | 12-14% | Efficient in compact form |
| Size | 24” x 13” | Portable and easy to mount |
A single SP18 generates 25-35 kWh annually, powering lights, small pumps, or devices for 6-8 hours daily with a 1-2 kWh battery.
Installation Flexibility
- Rooftop Mount: For small cabins or boats.
- Portable Setup: For RV or camping.
- Ground Mount: For temporary or telecom use.
Real-World Applications
Marine Beacon
An SP18 powers a navigation light, saving $75 yearly.
Kenya Telecom
Two SP18 panels support a relay, cutting emissions by 0.25 tons.
Benefits
Saves $50-$100 yearly per unit, offers versatile power, and reduces environmental impact.
Future Vision
Siemens Solar plans to enhance low-power modules like the SP18 with smart features by 2030.
