Sunnytech ST2420 User Manual Download Page 31

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6. Conversion Efficiency Curve

6.1 12V System Conversion Efficiency

6.1 24V System Conversion Efficiency

MPPT 12V conversion efficiency (12V battery)

Output power

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MPPT 24V conversion efficiency (24V battery)

Output power

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Summary of Contents for ST2420

Page 1: ...MPPT Series ST2420 ST2430 ST2440 Solar Charge and Discharge Controller User Manual Model ST2420 ST2430 ST2440 Battery voltage 12V 24V Max solar panel voltage 100V 25 C 90V 25 C Charging current 20A 3...

Page 2: ...ach a very high temperature therefore install the controller at a place with good ventilation conditions 5 It s recommended that a fuse or breaker be installed outside the controller 6 Before installi...

Page 3: ...and Wiring 14 3 Product Operation and Display 18 3 1 LED Indicators 18 3 2 Key Operations 21 3 3 LCD Startup and Main Interface 21 3 4 Load Mode Setting Interface 23 3 5 System Parameter Settings 24 4...

Page 4: ...us communication protocol making it easy for users to check and modify system parameters on their own Besides by providing free monitoring software we give users the maximum convenience to satisfy the...

Page 5: ...voltage is supported LED fault indicators and an LCD screen which can display abnormality information help users to quickly identify system faults Historical data storage function is available and dat...

Page 6: ...ing terminal RX 3 Power supply grounding Signal grounding 4 Power supply grounding Signal grounding 5 Power supply positive 6 Power supply positive Fig 1 1 Product appearance and interfaces No Item No...

Page 7: ...t get the most of the power from the solar panel But a solar charge controller featuring MPPT technology can continuously track arrays maximum power point so as to get the maximum amount of power to c...

Page 8: ...ur MPPT controller can adjust parameter settings according to the environmental conditions in real time so as to always keep the system close to the max operating point The whole process is entirely a...

Page 9: ...and temperature 1 5 Charging Stages Introduction As one of the charging stages MPPT can not be used alone but has to be used together with boost charging floating charging equalizing charging etc to c...

Page 10: ...ning charging When the battery voltage reaches the set value of sustaining voltage the controller will switch to constant voltage charging In this process no MPPT charging will be performed and meanwh...

Page 11: ...amage battery plates and cause active material on the battery plates to scale off Equalizing charging to an excessively high level or for too long a period may cause damage Read carefully the actual r...

Page 12: ...to maintain it at full state At this stage the loads can access almost all the solar power If the loads consume more power than the solar panel could provide the controller will not be able to keep t...

Page 13: ...dry The wiring terminals on the controller can be connected with a single battery or a pack of batteries Following descriptions in this manual apply to systems employing either a single battery or a p...

Page 14: ...s may produce a very high open circuit voltage Open the breaker or fuse before wiring and be very careful during the wiring process Note when installing the controller make sure that enough air flows...

Page 15: ...make sure the ambient environment is well ventilated Step 2 first place the installation guide plate at a proper position use a marking pen to mark the mounting points then drill 4 mounting holes at t...

Page 16: ...n order to guarantee installation safety we recommend the following wiring order however you can choose not to follow this order and no damage will be incurred to the controller 1 Connecting to extern...

Page 17: ...and reliably check again whether wiring is correct and if the positive and negative poles are reversely connected After confirming that no faults exist first close the fuse or breaker of the battery...

Page 18: ...ter is deployed in the system directly connect the inverter tothe battery and do not connect it to the controller s load terminals 3 Product Operation and Display 3 1 LED Indicators 1 PV array indicat...

Page 19: ...harging 4 Quick flashing a cycle of 0 2s with on and off each lasting for 0 1s Equalizing charging 5 Double flashing a cycle of 2s with on for 0 1s off for 0 1s on again for 0 1s and off again for 1 7...

Page 20: ...r Indicator state Load state Off Load turned off Quick flashing a cycle of 0 2s with on and off each lasting for 0 1s Load overloaded short circuited Steady on Load functioning normally ERROR indicato...

Page 21: ...ooth Abnormality Battery type Unit 3 2 Key Operations Up Page up increase the parameter value in setting Down Page down decrease the parameter value in setting Return Return to previous menu exit with...

Page 22: ...ll first flash successively and after self inspection the LCD screen starts and displays the battery s voltage level which will be either a fixed voltage selected by the user or a voltage automaticall...

Page 23: ...when sunlight emerges the solar panel voltage will become higher than the light control off voltage and after a time delay the controller will switch off the load 1 to 14 Light control time control 1...

Page 24: ...llows Press and hold the Tap the Up or Down Press and hold the Set key Load mode Set key to enter key to set the mode to save and exit Tap the Return key to exit without saving 3 4 3 Manual load on of...

Page 25: ...range Default setting 1 TYPE OF BAT Battery type User flooded Sealed Gel Sealed 2 VOLT OF SYS System voltage 12V 24V AUTO 3 EQUALIZ CHG Equalizing charging voltage 9 0 to 17 0V 14 6V 4 BOOST CHG Boos...

Page 26: ...nnected the controller will not break down and when the connection problem gets solved normal operationwill resume Load overpower protection When the load power exceeds the rated value the load will e...

Page 27: ...dents etc Repair or replace those affected when necessary Verify that indicators function in line with device operations Note any faults or displayed errors and take corrective measures if necessary C...

Page 28: ...ator steady on 4 E3 Battery under voltage warning ERROR indicator steady on 5 E4 Load short circuit LOAD indicator flashing quickly ERROR indicator steady on 6 E5 Load overloaded LOAD indicator flashi...

Page 29: ...e 35 C to 45 Protection degree IP32 Weight 1 4kg 2kg 2kg Communication method RS232 Altitude 3000m Product dimensions 210 151 59 5mm 238 173 72 5 238 173 72 5 5 2 Battery Type Default Parameters param...

Page 30: ...to 600 minutes When selecting User the battery type is to be self customized and in this case the default system voltage parameters are consistent with those of the sealed lead acid battery When modi...

Page 31: ...1 12V System Conversion Efficiency 6 1 24V System Conversion Efficiency MPPT 12V conversion efficiency 12V battery Output power W MPPT 24V conversion efficiency 24V battery Output power W Conversion e...

Page 32: ...ST2440 Product dimensions Hole positions Hole diameter Applicable wire max 8 AWG Product dimensions Hole positions Hole diameter Applicable wire max 8 AWG 7 Product Dimensions...

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