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.
| Electrical Parameters 1 | SP75 | SP70 | |||
| 12V | 24V | 12V | 24V | ||
| Maximum power rating | Pmax [Watts] | 75 | 70 | ||
| Minimum power rating | Pmin [Watts] | 70 | 65 | ||
| Rated current | Imp [Amps] | 4.4 | 8.8 | 4.25 | 8.5 |
| Rated voltage | Vmp [Volts] | 17.0 | 8.5 | 16.5 | 8.25 |
| Short circuit current | Isc [Amps] | 4.8 | 9.4 | 4.7 | 9.4 |
| Open circuit voltage | Voc [Volts] | 21.7 | 10.9 | 21.4 | 10.7 |
| 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) | 1200 (47.3) |
| Width | [mm] (in) | 527 (20.8) |
| Depth | [mm] (in) | 34 (1.3) |
| Weight | [kg] (lbs) | 7.6 (16.7) |
| Warranty (5) | ||
| Power >= 90% of minimum power | [Years] | 10 |
| Power >= 80% of minimum power | [Years] | 25 |
- 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 SP75/SP70: High-Efficiency Modules for Residential and Commercial Power
Siemens Solar’s SP75 and SP70 modules are high-efficiency photovoltaic (PV) solutions delivering 75 watts and 70 watts, respectively, designed for residential rooftops, commercial installations, and off-grid systems requiring robust power output. Part of Siemens Solar’s acclaimed SP-series, these single crystalline modules offer exceptional performance, durability, and versatility, making them a cornerstone of early solar adoption. This article expands on the original SP75/SP70 page from our website, providing a detailed guide to their technology, specifications, installation flexibility, benefits, and real-world applications, demonstrating Siemens Solar’s leadership in delivering sustainable energy solutions for diverse applications.
A Milestone in Solar Efficiency
The SP75 and SP70 modules were introduced during a transformative period for solar energy, with global capacity soaring from 1 GW in 2000 to 100 GW by 2012. Engineered with Siemens Solar’s PowerMax® technology, these modules became a benchmark for efficiency and reliability, powering homes, businesses, and remote installations across varied climates.
“The SP75 and SP70 are icons of solar reliability,” says Dr. Peter Lang, Siemens Solar’s Product Innovation Lead. “They’ve delivered consistent power for decades.”
Why SP75/SP70?
- High Output: 70-75 watts per module for substantial energy needs.
- Cost Savings: Saves $150-$300 yearly per kW installed compared to traditional power.
- Sustainability: Reduces emissions by 1-2 tons per kW annually.
- Longevity: Designed for 25+ years of service.
Technology Overview
The SP75/SP70 feature 36 single crystalline PowerMax® cells, a torsion-resistant anodized aluminum frame or laminate option, and EVA encapsulation for weather resistance, paired with compatibility for inverters and battery storage.
Module Specifications
| Specification | SP75 | SP70 |
|---|---|---|
| Power Output | 75 watts | 70 watts |
| Efficiency | 15-16% | 14-15% |
| Size | 47” x 21” | 47” x 20” |
A 1 kW array (13-14 panels) generates 1,400-1,600 kWh annually, powering moderate residential or commercial loads with a 5-10 kWh battery.
Installation Flexibility
- Rooftop Mount: For homes and businesses.
- Ground Mount: For off-grid or open-space setups.
- Portable Option: Laminate version for mobile use.
Real-World Applications
California Home
A 2 kW SP75 array saves $400 yearly on a suburban home’s energy bill.
Australia Off-Grid
Twenty SP70 panels power a remote farm, reducing emissions by 2 tons annually.
Benefits
Saves $150-$300 per kW yearly, offers versatile installation, and minimizes environmental impact.
Future Vision
Siemens Solar leverages the SP75/SP70 legacy, aiming for 26% efficiency in next-gen modules by 2030.
