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The full name of the MPPT solar charge controller is Maximum Power Point Tracking solar controller, is the upgrade products of traditional solar charging and discharging controller. The MPPT controller can detect the generation voltage of the solar panel in real time and track the maximum voltage current value (VI), so that the system can charge the battery with maximum power output. Applied to the solar power system, coordinate the work of solar panels, batteries, and loads, is the brain of solar systems.

The maximum power point tracking system is an electrical system that allows photovoltaic panels to output more power by adjusting the working state of the electrical modules. It can store the direct current generated by the solar panel effectively in the storage battery, which can effectively solve the life and industrial use of electricity in remote areas and tourist areas not covered by the conventional grid, and no environmental pollution.

What is the function of MPPT?

Because of the solar cells influenced by the intensity of the received light and environment and external factors, the output power is changed, the solar power inverter with MPPT is to make full use of solar cells, keep it at the maximum power point, which is the function of MPPT.

PV array is connected with a load through the DC/DC circuit, MPPT device to detect the change of the current and voltage of photovoltaic array, and according to the change of the DC/DC converter PWM drive signal duty cycle adjustment.

For linear circuits, when the load resistance is equal to the internal resistance of the power supply, the power supply has the maximum power output. Although photovoltaic cells and DC/DC conversion circuits are strongly nonlinear, they can be considered as linear circuits in very short periods of time. Therefore, as long as the equivalent resistance of the DC-DC conversion circuit is adjusted, so that it is always equal to the internal resistance of the photovoltaic cell, the maximum output of the photovoltaic cell can be achieved, so the MPPT of the photovoltaic cell is realized.

SOROTEC Solar MPPT Charge Controller 60A 3200W 12/24/48V

1. Intelligent maximum power point tracking technology increases efficiency 25%~30%
2. Compatible for PV systems in 12v, 24v or 48v
3. Three-stage charging optimizes battery performance
4. Maximum charging current up to 60a
5. Maximum efficiency up to 98%
6. Battery temperature sensor (BTS) automatically provides temperature compensation
7. Support wide range of lead-acid batteries including wet, AGM, and gel batteries
8. Multi-function LCD displays detailed information

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1.Rated output power

The rated output power of the solar inverter determines the output power, and the average household is about 3000W. If use the inverter as a standby power supply, only need to calculate the power consuming, according to the rated output power of the inverter is chosen to match the model.

2.Maximum output current

The maximum output current of the solar inverter involves the type selection of the circuit breaker, which is related to safety. It is necessary to pay special attention to the value of the solar powered inverter when installing the inverter.

3.Voltage and frequency of power grid

Select inverters that need to be connected to the grid. These values are the grid parameters that can be used in conjunction with the solar inverter. The power grid of China is 220V, 50Hz. If you choose to buy other countries’ products, we must pay attention to these two parameters, or finally choose a transformer.

4.Maximum harmonic content

The output voltage and current waveform of solar inverter with distortion phenomenon, it is easy to affect the power consumption of its equipment performance if this value is too large, Chinese safety regulations require maximum harmonic content must be <5% rated power. In the selection process of solar inverter, the smaller the value, the better. But the current inverter technology is difficult to avoid this problem, so choose according to the domestic safety regulation value.

5.Power factor

The power factor cosφ represents the proportion of active power in the total power of the solar power inverter.

SOROTEC SSP3118C1 1-5KVA Off-grid Pure Sine Wave Solar Power Inverter for home use with parellel operation Max to 6 units, with Built-in PWM solar charge controller

Key Features

1. Pure sine wave power inverter for home use
2. Cold start function
3. Remote panel available
4. Auto restart while AC is recovering
5. Overload and short circuit protection
6. Compatible to mains voltage or generator power
7. Selectable charging current based on applications
8. Configurable AC/Solar input priority via LCD setting
9. Built-in PWM solar charge controller ( While SSP3118C2 with Built-in MPPT solar charge controller)
10. Smart battery charger design for optimized battery performance
11. Parallel operation with up to 6 units only available for 4KVA/5KVA
12. Selectable input voltage range for home appliances and personal computers

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Tower UPS need to buy a new expansion one, the new UPS should be installed in place, bypass the other UPS in the system and then connect the new UPS to the system, the whole procedure is not only high investment, long installation time, because the entire system is in the bypass state while incorporate the new tower UPS, existing power interruption risk which leading to load power down. While the modular UPS as long as the layout of the distribution system is optimized in the early stage, the load can be increased by adding modules, and the uninterrupted power supply to the original load can be guaranteed during the expansion process.

SOROTEC MPS9335C 10-1200KVA With Switch Cabinet Modular UPS Systems

1.Superior energy saving and environment-friendly: Efficiency > 96% at 50%-75% rated load, and > 95% at 25% rated load; Input PF > 0.99,input THDi<3%.
2.Superior capability of powering load: Output PF is 0.9 or 1, no need of power deration with load of leading or lagging PF.
3.Easy-to-install: Top or bottom cabling, no need of input cabling cabinet.
4.Easy-to-maintain: Full front access, UPS, failed part can be replaced shortly.
5.Easy-to-modify: The number of battery cells can be configured flexibly, so the original batteries can be used when modifying the legacy system; moreover, the battery cell can be replaced in time when it fails without interrupting the normal operation of modular ups systems.
6.6-inch extra large LCD that can display 13 language (Chinese ,English ,Russian, French ,Spanlish and so on).
7.Provide large LCD touch screen (optional).
8.Each UPS modules provide 4.5KW charge capacity. equivalent to 10 to 12A.
9.On-Line Double Conversion, fully isolating the influences of power grid pollution and power failure from utility power supply and diesel generator to load.
10.Advanced DSP full digital control technologies realize higher system stability, online capacity expansion and maintenance.
11.Advanced distributed active parallel technology realizes parallel operation of 4 UPS units and online capacity expansion without centralized bypass cabinet.
12.Digital load sharing technology features extra low cross current and extreme high system reliability in parallel operation.
13.Adaptive to severe power grid environment due to extra wide input voltage and frequency ranges.
14.Extra strong capability to withstand output overload and short circuit, ensuring the system stability and system safety at limit conditions.
15.Intelligent battery management maintains battery automatically to prolong the battery life.
16.Efficient heat dissipation and effective protection under severe environment due to its independent layer-sealed ventilation channel and redundant fan design, as well as the paint-protected circuit boards and built-in dust filter.
17.Applicable voltage south America.

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If lightning occurs near the solar cell components, will produce electrostatic induction voltage on the solar panels. Since the positive and negative leads of the solar panels are very close, a ground induced electrostatic overvoltage UC is formed on the two wire simultaneously.

It can be seen that there is no electrostatic overvoltage in the positive and negative wire loops of the battery board, that is, electrostatic induction lightning strikes cause no damage to the internal circuit of the battery board. When lightning occur near the cloud panels, strong electromagnetic field will appear sharp change of magnetic flux in the battery, the conductor will produce excessive voltage and current. It is obvious that the overvoltage and overcurrent will only occur on the closed loop of the aluminum alloy frame and enter the ground through the support. Therefore, the electromagnetic induction overvoltage will not cause impact damage to the solar cell assembly. In addition, the height of the solar cell square is much lower than that of the low-voltage overhead output pole, so the grounding of the pole can be used as one of the lightning protection measures of the battery square.

Surge protection is achieved by installing surge protectors on live cables, reducing the damage caused by surge and lightning overvoltages to equipment. Lightning surge invasion routes of solar power generation system, in addition to solar cell array, and distribution line, ground wire, so the solar power generation system needs to take the following protective measures:
1.Install surge protection device at each DC input end of the solar inverter.
2.Install surge protector in the grid access control cabinet to prevent the lightning wave intruded along the connecting cable.

SOROTEC Solar MPPT Charge Controller 60A 3200W 12V 24V 48V

1. Intelligent maximum power point tracking technology increases efficiency 25%~30%
2. Compatible for PV systems in 12v, 24v or 48v
3. Three-stage charging optimizes battery performance
4. Maximum charging current up to 60a
5. Maximum efficiency up to 98%
6. Battery temperature sensor (BTS) automatically provides temperature compensation
7. Support wide range of lead-acid batteries including wet, AGM, and gel batteries
8. Multi-function LCD displays detailed information

Learn More

As an electronic product, solar power inverter is composed of many multi-element devices. Also known as power regulator, according to the inverter in the solar power generation system can be divided into off grid solar inverter and on grid inverter. For inverters used in grid connected systems, can be divided into transformer type inverters and no transformer inverters according to whether they have transformers or not. When operating the grid connected power generation, because of its particularity, can not be careless in the installation and maintenance, otherwise, otherwise, there could be a security risk.

Maintenance should pay attention to the following points:
1.Before any maintenance work, the electrical connection between the inverter and the power grid shall be switched off first, and then the electrical connection on the DC side should be disconnected.
2.Wait at least 5 minutes until the discharge of the internal components is completed before repairing.
3.Any fault that affects the safety performance of the inverter must be eliminated immediately before the solar panel inverter can be turned on again.
4.Avoid unnecessary circuit board contacts.
5.Observe ESD protection and wear antistatic bracelet.
6.Observe and comply with the warning signs on the product.
7.Visually inspect the equipment for damage or other dangerous conditions before operation.
8.Note the thermal surface of the inverter. For example, the power semiconductor radiator and so on, after power failure of the inverter for a period of time, still maintain high temperature.

After the maintenance of the inverter, make sure that any fault that affects the safety performance of the inverter has been solved before the inverter can be turned on again.

SOROTEC SSP3118C4 2KVA ~ 5KVA Solar Inverter Wall Mounted Integrated

1.Pure sine wave 2KVA inverter
2.Cold start function
3.Auto restart while AC is recovering
4.Overload and short circuit protection
5.Optional remote panel available
6.Selectable charging current based on applications
7.Configurable AC/Solar input priority via LCD setting
8.Compatible to mains voltage or generator power
9.Smart battery charger design for optimized battery performance
10.Parallel operation with up to 6 units only available for 4KVA/5KVA
11.Selectable input voltage range for home appliances and personal computers

Learn More