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SOLAR POWER SYSTEM

MODEL: SPS20

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Data Sheet

Document version v1.1

Description

The SensMax solar power system SPS20 is designed to provide a reliable and sustainable power source for the SensMax TAC-B sensors and other compatible SensMax devices. It utilizes solar energy to generate electricity and ensures continuous operation of the connected equipment even in remote or off-grid locations.

The SensMax solar power system SPS20 is an all-in-one solution that integrates all the necessary components into a single package. This includes the solar panel, charge controller and battery. The compact design and integration of these components into a single system make it convenient and space-efficient.

The components are pre-wired and ready to be connected, minimizing the need for technical expertise.

Technical Specification

Parameter Value
Model name SPS20
Max output load 20 W
Output voltage DC 10…14.6 V
Output connector DC5521 angle 90° (compatible with SensMax TAC-B sensors)
Solar panel • Solar Cell: 156Mono
• Optimum operating Current: 3.33 A
• Short Circuit Voltage: 3.66
• Open Circuit Voltage: 21.24 V
• Power: 60W
• Size: 680×510×35 mm
• Front Glass Thickness: 3.2 mm
• Tolerance Watts: ±3%
• Surface Max Load Capacity: 60m/s (5kg / sq.m)
• Allowable Hail Load: 23m/s, 7.53g
• Cell Efficiency: 21.60%
• Waterproof: IP67
Battery • Battery Type: LiFePO4
• Nominal capacity: 20 Ah
• Electricity: 256 Wh
• Nominal voltage: 12.8 V
• Cycle Life: >2000 times
Temperature range –20°C to +65°C (charging and discharging operations)
Waterproof IP67
Dimensions • Solar panel size: 680×510×35 mm
• Battery size: 205×100×40 mm
Weight 14 kg (whole system)

SensMax solar power system components

  • Solar panel
    The high-quality solar panel capture sunlight and convert it into electrical energy.

  • Smart Charging Controller
    The charging controller regulates charging process and ensures that the battery connected to the system is charged optimally. It prevents overcharging or deep discharging of the battery, thereby prolonging its lifespan.

  • Battery
    A high-quality LiFePO4 rechargeable battery stores the electricity generated by the solar panels during the day for later use, such as during nighttime or periods of low sunlight. The battery provides a stable power supply to the SensMax TAC-B sensor, ensuring uninterrupted operation. The LiFePO4 battery is placed in a metal sealed case and cannot be replaced by the user.

  • Mounting System
    The solar panels are mounted on a durable and adjustable mounting system to maximize sun exposure and optimize energy generation. The mounting system ensures that the panels are securely fixed in place and properly angled to receive the maximum amount of sunlight throughout the day.

  • Wiring and Connectors
    The various components of the SensMax solar power system are connected using appropriate wiring and connectors. The wiring transfers the electricity between the solar panels, charge controller, battery, and other components, ensuring efficient energy flow and system functionality.

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a. Solar panel
b. Mounting system
c. Mounting bracket with built-in battery and charging controller

Operation at sub-zero temperatures

The battery case has a built-in heater that maintains the internal temperature at 0...+4°C. This allows charging to be maintained down to –20°C. However, if the ambient temperature is below –20°C, battery charging will be disabled.

Useful Information

  1. Solar energy is given first priority to power the load. If there is enough solar power available, it also charges the battery. When solar energy is not sufficient to power the load, the battery takes over and supplies power simultaneously.
  2. If the battery is fully discharged, it may require up to 1 hour of sunlight exposure before the system will power the load again.

  3. Full battery charging time from the sun is about 6 hours.
    The battery charging rate is calculated using the formula:
    E = 60 W × 0.7 × SUNSHINE_HOURS
    Where E is the energy in Wh.

  4. The SensMax TAC-B sensor uses about 3-4 Wh of energy, depending on the model. Therefore, with the SPS20 solar system, the TAC-B sensor can be powered for approximately 64-85 hours without sunlight.

Contacts

SensMax is a registered trademark. SensMax reserves the right to make changes to the products described herein without prior notice. The information contained in this publication regarding device applications and the like is provided solely for your convenience. SensMax disclaims all liability arising from this information and its use. The use of SensMax devices in life-support and/or safety-critical applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify, and hold harmless SensMax against any and all damages, claims, suits, or expenses arising from such use. No licenses are conveyed, implicitly or otherwise, under any intellectual property rights of SensMax.