Shunt charge controller / Gentle and reliable charging
The cost-effective 8 A and 20 A shunt solar controller are ideal for small and medium size solar systems. They recognized self-employed whether a 12 V respectively a 24 V system is connected. The shunt charge controllers are equipped with the essential regulating and protective functions which are required for gentle and safe charging and discharging of lead-acid and lead-gel batteries:
- PWM charging method
- Overcharging protection
- Gassing regulation
- Deep discharge protection
The main characteristics and features:
- Shunt charging regulation
- Pulse-width-modulated charging control (PWM)
- Suitable for lead-acid and lead-gel batteries
- Automatic voltage recognition 12 V/24 V
- Controlled, temperature-dependent gassing
- With integrated temperature sensor
- Temperature-compensated charging
- Low internal current consumption
- LED battery status indicator
- Robust metal housing
- Equipped with all important protective functions
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Technical data
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Solar Controller 12 V / 24 V, 8 A |
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| Battery system voltage |
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12 V / 24 V |
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Supported battery types
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Lead-acid, lead-gel
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Type of charge control
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PWM Shunt
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| Max. panel power |
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90 W / 180 W |
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| Max.panel voltage |
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22 V / 35 V
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Max.panel/charging current
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8 A |
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Max. load current
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8 A |
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| Internal current consumption |
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2 mA
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| Fuse |
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10 A
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| Temperature sensor |
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Yes, integrated
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| Operation temperature |
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-25° C bis +50° C |
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| Common ground potential (negative pole) |
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No |
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| Switchable load output |
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No |
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| Display |
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LED |
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| Housing |
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Metal |
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| Dimensions (L x W x H) |
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95 x 95 x 35 mm |
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| Weight |
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230 g |
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Charging parameters |
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| Cut-off voltage |
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13,7 V / 27,4 V
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| Cut-off voltage, gassing deactivated |
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14,1 V / 28,2 V |
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Trickle charging
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13,7 V / 27,4 V |
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| Trickle charging, gassing deactivated |
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14,1 V / 28,2 V |
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Gassing active from
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12,4 V / 24,8 V |
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| Gassing-end voltage |
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14,5 V / 29 V |
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| Temperature compensation |
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24 mV/K / 48 mV/K |
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| Temperature compensation, at gassing |
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18 mV/K / 36 mV/K |
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Deep discharge protection load output |
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Shut-off voltage
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11,1 V / 22,2 V
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Reset voltage
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12,6 V / 25,2 V
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| Order no. |
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200001 |
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Delivery content:
- Shunt Solar Controller 12 V / 24 V, 8 A
- Operation manual in DE, GB, FR, NL
Downloads:
Brochure
Solar technology
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Instruction manual
Shunt Solar Controller 8 A
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Deep discharge protection:
The integrated deep discharge protection automatically turns the load output off as soon as the battery voltage drops below the minimum voltage. If the battery has been recharged and the battery voltage raises above the reactivation voltage the solar controller reactivates the load output automatically. Overcharging is prevented by virtue of the integrated overcharging protection.
Automatic temperature compensation:
The temperature sensor (built-in for the 8 A, external for the 20 A) allows for the best possible charging of the battery in the case of fluctuating temperatures. The cut-off voltage and the gassing-end voltage are adapted dynamically to the prevalent temperatures. In the case of high temperatures the cut-off voltage will be decreased, at low temperatures it will be increased.
Gassing regulation:
If a lead battery is operated for a longer period of time without a controlled gas evolution harmful acidic layers may be built. The solar controller eliminates respectively prevents the forming of acidic layers by means of controlled gassing. This behavior also depends on the temperature and is compensated by the temperature sensor.
LED indicator:
The two LEDs inform about the real time charging condition as well as about the operation status of the battery.
PWM charging method
Solar controllers which operate based on the PWM principle charge the battery with maximum current at the beginning of the charging process. As soon as the respective cut-off voltage is reached the current flow is stopped, so that overcharging is prevented.
Most of the times the battery is not fully charged after this first charging step. A drop of the battery voltage is to be expected. Therefore the charging current is initiated again if the voltage falls short of a defined value. This process will be repeated until the battery is fully charged.
