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PWM solar street lamp charge controller

Key features:

1. IP68 waterproof degree

2. 12V/24 auto

3. Five load working mode

4. No-load loss is less than 8mA.

5. mini size.

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Features of  SR-SL

1.The design of IP68 waterproof level and aluminum shell helps effectively prevent erosion. 
2.12 V/24 V system voltage.
3.LED numeric display and waterproof keys are easy to use.
4.An upgraded 3-stage PWM charging algorithm applies an equalizing charge to the battery every week, effectively preventing the battery from non-equalization and sulfuration and therefore extending the battery's service life.
5.Up to 5 load working modes facilitate the product's application to different types of road lamps and monitoring devices.
6.Charging program options are available for sealed, GEL and flooded lead-acid batteries and ternary-material lithium and lithium iron phosphate batteries. 
7.An external temperature sensor helps deliver high-precision temperature compensation. 
8.Parameter settings of power-down saving functions eliminate the trouble of repeated settings, making operation easy and convenient. 
9.Various kinds of state indicators. 
10.Overcharge, over-discharge and overload protection, as well as short-circuit and reverse-connection protection.
11.TVS lighting protection.

Parameter of SR-SL

Battery type Sealed GEL Flooded Ternary-material lithium Lithium iron phosphate
System current 10 A; 20 A
No-load loss 10 mA/ 12 V; 13 mA/ 24 V
Solar energy input voltage < 55 V
System voltage 12 V/ 24 V Auto 12 V/ 24 V Auto 12 V/ 24 V Auto

3 and 4 strings: 12 V system

7 strings: 24 V system

4 strings: 12 V system

8 strings: 24V system

Overvoltage protection 17.0 V 17.0 V 17.0 V 4.2 V * N + 2.0 V 3.65 V * N + 2.0 V
Equalizing charging voltage 14.6 V - 14.8 V - -
Boost charging voltage 14.4 V 14.2 V 14.6 V - -
Floating charging voltage 13.8 V 13.8 V     13.8 V - -
Overcharge voltage - - - 4.2 V * N 3.65 V * N
Overcharge recovery - - - 3.9 V * N 3.4 V * N
Boost charging recovery voltage 13.2 V 13.2 V 13.2 V - -
Over-discharge recovery voltage 12.5 V 12.5 V 12.5 V 3.3 V * N 3.0 V * N
Undervoltage 12.0 V 12.0 V 12.0 V 3.2 V * N 2.8 * N
Over-discharge voltage 11.0 V 11.0 V 11.0 V 3.0 V * N 2.5 V * N
Temperature compensation -4.0 mv/°C/ 2 V - -
Equalizing charging duration 1 hour - 1 hour - -
Boost charging duration 4 hours 4 hours 4 hours - -
Light controlled voltage Light controlled on 5 V, light controlled off 6 V
Light control judgment time 1 min
Overload and short-circuit protection

1.25 times of rated current: 30 s;

1.5 times of rated current: 5 s of overload protection;

Over 3 times of rated current: short-circuit protection.

Operating temperature -35°C to +65°C;
Protection degree IP68
Weight 140 g (10 A)             300 g (20 A)
Dimensions 82×58×20 (mm)/ 10 A; 82×100×20 (mm)/ 20 A

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