Solar Hybrid PCU PWM

Solar Hybrid PCU PWM With A Brain

What Is A PWM Charge Controller?

The Solar charge controller is the device that helps charge the battery through the solar panels. This device is important for charging the battery through Solar panels and is called a solar charger or solar charge controller.

PWM stands for Pulse Width Modulation, and the charge controller is a simple charge controller circuitry which provides the power from the solar panels to the battery.

Another important feature of the solar charge controller is to have the ATC (Automatic temperature compensation) to take care of the Lead Acid battery to control the boost voltage according to the temperature so that the Lead Acid battery can give the proper backup time in winter and in summers battery boost voltage is reduced to save the electricity bill and the life of the battery. Another function of the charge controller is to stop the current flow from the battery to the Solar panel. As both are DC devices, the current flow will happen on both sides, so at night, if the battery starts giving current back to the solar panel, it might damage the solar panels. So there is a diode which controls the flow of power from the solar panel to the battery and doesn’t let the current flow back the Current to the solar panel through the battery.

Ability To Control Wirelessly (Optional)

Su-vastika has developed Bluetooth and WiFi app for all its Inverters/UPS/Home UPS/ Solar Hybrid PCU/ERD/ESS that helps to monitor and control UPS through Mobile app or direct PC and loaded with the patented software.

This feature offers many advantages over regular Inverters/UPS.

• Ease of installation
• Remote monitoring
• Real-time data
• Digital Warranty
• Voltage and frequency
• Shows charging percentage of the battery

Compatible With LiFePO4 Battery

One can buy a Lithium Ion Phosphate LifePO4 battery and install it with our Solar hybrid PCU without making any changes. We have changed the charging software along with the limits of Low battery and boost voltage according to the lithium battery. In our Bluetooth-based Solar Hybrid PCU, the user can select the switch on the mobile application and make the changes very easily. In the mobile application, there is a provision for seeing which battery you have selected so the user doesn’t change the settings by mistake. Otherwise, there may be a problem with the charging profile.

Isolation Transformer

Su-vastika Solar Hybrid PCU has Built-in Isolation Transformer also called galvanic isolation, implies that no direct path exists for the current to flow from the source to the load. An isolation transformer provides isolation between the electrical devices and the source powering these devices. In other words, the output power circuit is electrically and physically isolated from the input power circuit with an isolation transformer. As a result, the isolation transformer provides safety to the users and the appliances. This feature protects our Solar PCU in case of High and Low voltages and spikes and surges in the areas where the power is fluctuating or where the power is not very stable. Most areas have a weak neutral, and the High frequency based Solar PCUs can’t withstand this condition. In our Solar PCU, the ruggedness in the dusty environment, power variations, etc., can be handled because of this well-designed Isolation transformer.

Bi-directional Technology

Su-vastika’s Solar Hybrid PCU works on Revolutionary Bi-directional technology. A Bi-directional technology is a technology that allows for two-way charging due to its ability of two-way conversion—from AC to DC and from DC to AC. A Bi-directional technology uses the same PWM (Pulse Width Modulation) based MOSFET (metal–oxide–semiconductor field-effect transistor) circuit to charge and discharge the battery.

Safe Voltage Range (Brain With A Muscle)

When there is a sudden high voltage spike, home’s MCB might not be able to protect the appliances, but Su-vastika Solar Hybrid PCU will.

It will rapidly switch from the mains to the battery. In fact, Solar Hybrid PCU can take up to 2.5x its load capacity, supporting your entire load during that high voltage spike. It then intelligently reminds you to turn off the extra appliances, so that the load can be reduced.

Advanced Protection

Short circuits are very common in homes. Therefore every household is equipped with an MCB or Main fuse. However, these can be slow and inefficient at protecting your appliances from damage.

We know how much you love your appliances. Therefore, we have designed Solar Hybrid PCU to add a smart layer of protection to them. It has an inbuilt Special MCB, which trips and protects all your appliances even before the traditional MCB can respond.

Charging Selection

There are multiple types of Batteries available in the market, which have advantages and disadvantages, and accordingly, we charge them based on their characteristics.

For example, if we have to charge a Tubular Lead Acid battery, we have to take a minimum of 10 hours before we completely charge it. If we try to charge faster, these Batteries will be short-lived and need frequent water topping will be required. If we have to charge the Valve Regulated Lead Acid Batteries (VRLA), which are called sealed Maintenance Free batteries, they need to be charged in 6 to 8 hours, and if we try to charge them faster than that, their life is also reduced. In the case of Lithium Batteries, we can charge them in 2 to 4 hours, and they have a life cycle nearly 5 times that of Lead Acid Batteries. It’s very important how the charger of a UPS is designed to take care of the battery as the life of the battery will majorly dependent on the charger technology. Our Solar PCU has a charging capacity of 15 Amp, which can charge the 150 Ah battery in 10 hours. So the charger size is very important to check before buying any UPS.

The next parameter is how the charging is done. Is it flat charging, or it’s done in stages? In Lead Acid battery, charging must be fast until 80 per cent of the charge. Still, the rest, 20 per cent, needs little slow charging because the water is hot inside the battery when we are charging it, so we need to follow a pattern by which we reduce the heating when we are charging it so that water doesn’t evaporate and the more we control the heating inside the battery life of the battery is increased.

Adaptive Performance Using ATC

Su-vastika Solar Hybrid PCU is designed for rough weather conditions. It has an ambient sensor and antenna placed. With advanced Automatic Temperature Compensation (ATC) built right into the microprocessor, Su-vastika Solar Hybrid PCU senses the temperature around it and then makes intelligent adjustments.

For example, in summers or hotter regions, the temperature is high, and hence the battery is charged to a lower voltage for the same power back-up performance. This saves you some extra bucks while also making sure the battery doesn’t overheat, loose water, or get damaged.  Similarly, in winters or colder places, the temperature is lower and hence the battery is charged to a higher boost voltage to make sure you get the required or expected amount of power back-up. This makes Su-vastika Solar Hybrid PCU a perfect choice for any climate, from the extremes of Northern America and Europe to the beating heat in Middle-East and South-East Asia, we are ready for a rough world.

Low Voltage Charging

In Low voltage areas, user uses a Voltage stabiliser and PCU to charge the battery properly. In our Solar Hybrid PCU, we also have the charging at low voltages, so there is no need for a stabiliser.

Automatic Bypass

What if your UPS has a technical error and is unable to switch your load back to the main supply? And imagine this happens in the middle of a summer night, and an electrician can only come the next morning. Intolerable, right?

This is common with almost every UPS or Inverter but not in Su-vastika Solar Hybrid PCU models because it has a feature of ‘Automatic bypass system’ which bypasses the Mains supply even when the UPS is faulty.

Battery Selection Switch

Every battery is built to accept a certain maximum allowed charging speed. A Tubular Lead-Acid battery needs a minimum of 10 hours, a Sealed Maintenance Free (SMF) battery requires 6-8 hours, while a Lithium-Ion battery requires 2-4 hours to get fully charged healthily.

Charging the batteries faster than these healthy limits reduces the battery’s life and increases maintenance costs and hassles. That’s why Solar Hybrid PCU is built with the Right Charger that charges batteries at optimum speed.

Battery Selection Switch is an innovative feature of Solar Hybrid PCU that enables you to select the battery type you have installed so that it can control and optimize the charging speed to keep your battery healthy. This makes Solar Hybrid PCU compatible with Tubular, SMF and Lithium LifePO4 batteries.

In our Bluetooth and WiFi based Solar PCU one can select the battery type from the setting on mobile application.

Battery Sizing Selection Switch

Su-vastika Solar Hybrid PCU has a feature to select the size of the battery through Bluetooth and Wi-fi application

Battery Reserve Feature OR Settable LCV For Battery

With prolonged usage, a battery’s life gets reduced. This is what happens to every battery after multiple charge-discharge cycles, even inverter batteries. Nerds call it battery fatigue.

Su-vastika Solar Hybrid PCU knows how to beat this problem too. When the battery is being used to power your appliances and is about to get empty (but not fully empty), Solar Hybrid PCU places a reserve. This means it doesn’t let the battery get fully or deeply discharged, hence extending the life of the battery by leaps and bounds.

This is similar to the reserve tank we have in our cars and scooters. It makes sure that even after you run out of battery power, you are still left with the reserved capacity to get done with emergency situations, by simply pressing a button.

Battery Reserve Mode setting % and battery low cut voltage:-

• At 0% the battery low cut voltage will be 10.5V
• At 3% the battery low cut voltage will be 10.8V
• At 5% the battery low cut voltage with be 11V
• At 8% the battery low cut voltage will be 11.2V
• At 10% the battery low cut voltage will be 11.4V

LCD Display Message

Overload & Short-circuit Feature

In Su-vastika Solar Hybrid PCU, We have given a special overload feature in which when the hybrid Solar PCU once get overloaded will retry eight times before it shuts down. This feature is very important for the user as when the extra load is run, which the Solar PCU cannot support, it switches off immediately and keeps warning. Then the user has to reduce the load and go to the ups and reset the front switch, which is very uncomfortable for the customer because, at times, the whole house gets into darkness, and for the user to switch off the load and reaches the ups is tough as it laying in one corner of home or office. So we have given a special feature in our ups; in case of overload, our ups give you eight times switching on and offload; in that time user can reduce the load, and there is no sudden darkness in the house/office.

Just like overload retries, our Solar PCU also has a feature of short circuit retries. With this feature, our Solar PCU will shut down automatically and start again whenever there is a short circuit. In this process, our Solar PCU will check whether the short circuit’s condition has been eliminated. If the short circuit has been eliminated, the UPS will start working normally. If the short circuit’s condition continues, our Solar PCU will retry 4 times before permanently shutting down. To make it operational again, reset the front switch of UPS.