| Model | OPS1230 | OPS1240 |
| Rated charging current | 30A | 40A |
| Rated discharging current | 30A | 40A |
| Short-current protection | 60A | 60A |
| System voltage | 12V/24V Auto adapt | |
| Over current protection | <1.3 maintain for 60s | |
| <1.6 maintain for 5s | ||
| >1.6 shut down immediately | ||
| Stand-by lost | <5mA | |
| Charge voltage drop | ≤0.26V | |
| Discharge voltage drop | ≤0.15V | |
| Max solar panel voltage | 42V | |
| Operating temperature | -35℃ to +55℃ | |
| Equalize charging voltage | 14.8V | |
| Bulk charging voltage | 14.5V | |
| Acceptance charging voltage | 14.2V | |
| Float charging | 13.8V | |
| Charge return voltage | 13.2V | |
| Discharge stop voltage | 11.2V | |
| Discharge return voltage | 12.6V | |
| Temperature compensation | N/C | |
| Control mode | PWM( Pulse Width Modulation ) | |
| Maximum wire size | 10AWG | |
| Size/weight | 140×90×38mm/220g | |
The features of the PWM solar controller 40A are as below
1.MCU automatic control; 2.Work voltage automatic detection; 3.Level 3 overload protection; 4.Reverse connect and reverse filling protection; 5.Output soft start; 6.PWM charge mode;12v 40 amp solar charge controller 7.State of charge; 8.Five level that the battery power; 9.Load status display; 10.Suitable for all 12/24VDC lamps; 11.Temperature compensation; 12.Auto light-activated; 13.Light-activated and delay; 14.Support manual mode; 15.17 work mode; 16.SMT manufacturing processes.The principle of PWM controller
The impulse of the same and different shape of the narrow pulse, added to the link with inertia when they are the same effect.PWM control principle: is to divide the waveform into 6 equal parts, which can be replaced by the 6 square waves.There are many classifications of PWM, such as unipolar and bipolar, synchronous and asynchronous, rectangular and sinusoidal modulation, etc. Unipolar PWM control means that within half a cycle, the carrier only changes in one direction, and the resulting PWM waveform also changes in one direction.Bipolar PWM control method is unipolar opposite, he is in half a cycle carrier changes in two directions.According to whether the carrier signal and the modulation signal keep synchronization, PWM control can be divided into synchronous modulation and asynchronous modulation.The characteristic of rectangular pulse width modulation is that the output pulse width line is equal width and can only control a certain number of harmonics.The characteristic of sinusoidal pulse width modulation is that the output pulse width is unequal, the width changes according to sinusoidal law, and the output waveform is close to sinusoidal wave.Sine pulse width modulation is also called SPWM.The key of this technique is to generate pulse width according to the control signal.At present, triangular wave comparison method, hysteresis comparison method and space voltage vector method are commonly used.Specifications
