30 Amp
Solar Charge
Controller
SCC-30AB
Owner's
Manual
Please read this
manual before
operating your
charge controller.
Page 1: ...30 Amp Solar Charge Controller SCC 30AB Owner s Manual Please read this manual before operating your charge controller...
Page 2: ...Description of Solar System 18 3 General information Batteries 15 4 Principle of Operation Features 21 5 Construction Layout and Controls 33 6 Installation and Operation 38 7 Troubleshooting 47 8 Spe...
Page 3: ...Controller should be installed indoor only in a well ventilated cool dry environment Do not expose to moisture rain snow or liquids of any type Preventing fire and explosion hazards Working with the...
Page 4: ...ng of 30 A The Short Circuit Current of the Solar Array should be less than 30A Do not exceed a Battery Voltage of 24V nominal Do not use a battery less than 12V Charge only 12 or 24V Lead Acid batter...
Page 5: ...t Current and is abbreviated as Isc When the Panel is shorted the Voltage in the circuit is zero Conversely the maximum Voltage occurs when there is a break in the circuit This is called the Open Circ...
Page 6: ...r Panel There is a point on the knee of the I V Curve where the maximum power output is located and this point is called the Maximum Power Point MPP The voltage and current at this Maximum Power Point...
Page 7: ...ys By the intensity of the incident light By the wavelength of the incident rays The materials used in Solar Cells have different spectral responses to incident light and exhibit a varying sensitivity...
Page 8: ...l The nominalVoltage of a Ni Cad Ni Fe battery bank can be made the same as a lead acid bank just by juggling the number of cells 10 cells for 12V 20 cells for 24V and 40 cells for 48V systems However...
Page 9: ...ositive plate gradually turns to Lead Dioxide chocolate brown color and the Lead paste in the Negative plate turns to Sponge Lead slate gray color Such charged cell is ready to be used The above grid...
Page 10: ...4V per cell at 25 C 77 F or 14 4V for a 12V battery at 25 C 77 F that restores the last 20 to 30 of the capacity On completion of this stage of charging the Lead Sulphate at the Positive and Negative...
Page 11: ...charge and has a low rate of self discharge An AGM battery will handle overcharging slightly better than the Gel Cell Non Sealed Vented Flooded Wet Cell Lead Acid Batteries In a non sealed vented floo...
Page 12: ...electrical energy the battery can store and deliver to a load It is determined by the amount of current any given battery can deliver over a stipulated period of time The energy rating is expressed in...
Page 13: ...Ah capacity if it is slowly discharged over 20 hours at the rate of C 20 A or 5A However if it is discharged at a rate of 2 Hrs C 2A or 50A then theoretically it should provide 100 Ah 50A 2 Hours How...
Page 14: ...y the manufacturer Battery Efficiency A lead acid battery has an efficiency of only 75 85 The energy lost appears as heat and warms the battery This means that the Ampere Hour Ah energy required to ch...
Page 15: ...e Change as 5 mV C Cell or 30mV 03V for a 6 cell 12V battery Battery Temperature Absorption Voltage 12V Battery 40 C 13 95V 25 C Reference 14 4V Reference 10 C 14 85V In case temperature compensation...
Page 16: ...as a function of the state of charge 80 60 40 20 0 0 20 40 60 80 100 State of charge Temperature C slushy until hard 80 60 40 20 0 0 20 40 60 80 100 State of charge Temperature C slushy until hard Ser...
Page 17: ...teries 1 to 4 are paralleled connected together and this common Positive connection becomes the Positive terminal of the 12V bank Similarly the four Negative terminals of Batteries 1 to 4 are parallel...
Page 18: ...None of the batteries will see an overcharge condition If the Positive output cable of the battery charger Cable A is connected to the Positive battery post of the first battery Battery 1 in Fig 3 3...
Page 19: ...e a Find out the power rating of each AC and DC device in Watts W If Watt rating is not available calculate the Watt rating using Formulae 1 or 2 b Determine calculate the power drawn from the battery...
Page 20: ...stage charger may be used Constant Current Bulk Charging followed by Constant Voltage Boost Absorption Charging followed by Constant Voltage Float Charging followed by Constant Voltage Equalization E...
Page 21: ...racter LCD Display with backlight for display of operating information and data Additional LED indication for displaying the charging stages Optional remote Battery Temperature Sensor BTS Model DC BTS...
Page 22: ...e Switch which is 3 33 ms Number of cycles of switching per second is called the PWM Frequency Mathematically Frequency 1 Pulse Period T and is 300 Hz in this case 1 33 3 ms 300 Hz The duration of ON...
Page 23: ...Duty Cycle regularly at a very fast rate The Duty Cycle is proportional to the difference between the sensed battery voltage and the Voltage Regulation Set Point Once the specified Voltage Regulation...
Page 24: ...Duty Cycle of 0 to 10 which is equivalent to Constant Voltage Transition from one stage to the other will be controlled by the selected Voltage Regulation Set Points as follows Absorption Voltage Reg...
Page 25: ...Voltage Set Point displayed on Screen 5 Fig 5 3 under Bulk The Status LED will blink GREEN The number of blinks indicates battery voltage levels as follows Blinking Pattern of Status LED Bulk Stage No...
Page 26: ...on the screen under Bulk The Status LED will blink GREEN 5 times NOTE During Absorption Stage if the load current is more than the current from the solar panel the battery voltage will drop If the ba...
Page 27: ...anels should be at least 5 to 10 of the Ah capacity of the battery bank Equalization is intentional overcharging of the battery for controlled period of time Routine equalization cycles are often vita...
Page 28: ...d before the cells with lower voltage The more a battery is cycled the more cell voltage separation takes place In a healthy battery all the individual cells will have the same voltage and same specif...
Page 29: ...ack of the unit Fig 5 2 Please refer to Fig 4 1B Stage 1 Bulk Stage During the night of the 27th day the battery voltage will drop below the Float Transition Voltage Set Point Vf Curve portion A1 to B...
Page 30: ...s Change over to the next Float Voltage Regulation Set Point Vf is possible only after the battery voltage is held at the selected Equalization Voltage Regulation Set Point Ve for continuous or cumula...
Page 31: ...rtion D1 to E1 the Switch operates under PWM control by feeding pulsing Short Circuit Current Isc with very low Duty Cycle of 0 to 10 to keep the battery voltage constant at the Float Voltage Regulati...
Page 32: ...battery temperatures often vary up to 15 C from the 25 C reference The Absorption Float Equalization Voltages must then be adjusted or a controller with Temperature Sensor should be used Table below...
Page 33: ...uired to be made in the wall panel to accommodate the PCB at the back of the unit As the components at the back of the unit will be hidden and protected behind the wall panel the components at the bac...
Page 34: ...75V below Absorption setting 1 5V below Absorption setting 3 Blinks Green Bulk 0 50V below Absorption setting 1 0V below Absorption setting 4 Blinks Green Bulk 0 25V below Absorption setting 0 5V bel...
Page 35: ...tV Screen 2 It is a resettable counter that displays the Ampere Hours Amp Hours of energy in Ah delivered by the solar panel into the batteries with effect from the time the solar panel has been conne...
Page 36: ...OTE The battery temperature can not be displayed below 0 C If the battery temperature falls below 0 C the display will read C Amp Watts BatV 0 0 0 0 12 0 Amp Hours 0 Ah Total Amp Hours 0 Ah Mode Charg...
Page 37: ...or BTS displays 0 C Battery temperature is below 0 C 1 Lower limit of temperature compensation is 0 C 2 Negative values can not be displayed NOTE See Table 7 1 under Section 7 Troubleshooting for reme...
Page 38: ...fire due to short circuit Further higher wiring resistance reduces current flow resulting in higher charging times Voltage drop in the wiring from the Charge Controller to the battery results in unde...
Page 39: ...to get started using the SCC 30AB controller However please review the entire manual to ensure best performance and years of trouble free service Notes SCC 30AB prevents reverse current leakage at ni...
Page 40: ...ing source and that there is adequate cooling air flow across the face plate to remove the heat dissipated from its surface A drawing for making the cutout in the wall panel is given at Fig 6 1 not to...
Page 41: ...nect the BATTERY first Be careful that bare wires do not touch the metal case of the controller Connect battery Negative first and then the battery Positive Use 32V 35A fuse in series with the Positiv...
Page 42: ...olar Panel Array while connected to the controller since this will damage the controller 7 For most effective surge protection it is recommended that the Negative system conductor be properly grounded...
Page 43: ...LA battery For a generic non sealed vented flooded well cell Lead Acid battery choose Battery Type 4 Note 1 All Voltage values are at battery temperature of 25 C 77 F 2 All the voltages given in the T...
Page 44: ...Both automatic and manual equalizations can be performed using the standard charging programs Table 6 1 Manual Equalization SCC 30AB is shipped with the DIP Switch 5 Fig 5 2 set for manual equalizatio...
Page 45: ...on Temperature Compensated Battery Charging Please read background information on temperature compensation under heading Effect of Temperature on Battery Voltage on page 15 An optional Battery Tempera...
Page 46: ...trolyte temperature can affect charging battery capacity and battery life The greater the range of battery temperatures the greater the impact on the battery For example if the battery temperature fal...
Page 47: ...larm OT Blinking Red Heat Sink over Temperature Heat sink temperature exceeds 90 C Alarm CPF00 Link Master Error Solid Red Display Panel Error The CPU is not able to exchange data with the Display Pan...
Page 48: ...he Battery Voltage is low the controller is not charging the batteries and may be damaged SYMPTOM 2 Battery Voltage IS TOO HIGH The Status LED 2 Fig 5 1 will be blinking Green at 5 blinks and the Batt...
Page 49: ...Cd CHARGING ALGORITHM 4 Stage Bulk Absorption Float Equalization CHARGING PROGRAMS 8 Programs Switch selectable ABSORPTION VOLTAGE 14 0V to 16 0V For maximum 1 hour FLOAT VOLTAGE 13 4V 14 5V EQUALIZAT...
Page 50: ...C to 85 C 67 F to 185 F HUMIDITY 95 Non condensing MECHANICAL DIMENSIONS W x D x H 190 X 34 x 108 mm 7 5 X 1 35 x 4 25 in WEIGHT 0 4 kg 0 8 lb ENCLOSURE FACE PLATE Powder coated steel For indoor use...
Page 51: ...sonable number of opportunities to do so Warranty service shall be performed only by the Warrantor Any attempt to remedy the defect by anyone other than the Warrantor shall render this warranty void T...
Page 52: ...Notes...
Page 53: ...Notes...
