If your old battery has dropped down to just 8 volts and you thought it’s completely dead, think again! With UTL’s PWM Solar Management Unit (SMU) 12V/24V 40A, even a deeply discharged battery can come back to life using just solar energy. This powerful and smart device is designed to make your inverter system not only solar-compatible but also more efficient, environment-friendly, and cost-effective.
Converts Your Regular Inverter into a Solar Inverter
Many homes still use regular inverters that depend on grid power. But with the UTL SMU, you can convert your existing inverter into a solar inverter without any major changes. This unit ensures that solar power is always used first, reducing your electricity bill and dependency on the grid.
It automatically selects between 12V and 24V, depending on your battery system. And the built-in PWM charge controller manages solar power efficiently while preventing overcharging or undercharging. It’s also designed to switch between solar and grid power automatically—daytime operations use solar energy, while nighttime operations fall back on the inverter, using the stored battery charge.
Charges Even Deeply Discharged Batteries
One of the most impressive features of the UTL SMU is its ability to charge batteries even if they drop to 8V, which is considered deeply discharged. Most solar units fail to revive such batteries, but UTL’s advanced microcontroller-based system makes this possible.
The SMU uses a 4-stage battery charging algorithm:
- Boost – Gives a strong current until battery voltage reaches 14.4V.
- Absorption – Maintains 14.2V for 3 hours.
- Float – Reduces the current to zero to keep the battery topped up.
Equalization – Occasional high-voltage charge to balance cell voltages.
This intelligent charging system not only revives batteries but extends their lifespan significantly.
Built-in Protections and Smart Features
Safety is a key highlight of UTL’s Solar Management Unit. It comes with built-in protections such as:
- Overcharging voltage and current protection
- Under-voltage protection
- Reverse polarity protection for both the battery and the solar panel
- Prevention of reverse current at night
- Over-temperature shutdown
This means you can run your solar system without worrying about system damage or hazards. Also, the idle consumption is less than 20mA, which makes the SMU incredibly efficient.
Compact, Reliable, and Easy to Install
Despite its powerful features, the UTL SMU is compact in design and easily wall-mountable. It’s eco-friendly and perfect for residential use. Whether you’re in a city or a village, this unit is a game-changer for anyone who wants to use solar energy smartly.
It works in tough temperature conditions, from 0°C to 60°C, and comes with a 1-year warranty, offering peace of mind to the users. Whether your system has one battery or two, this SMU adapts to it easily.
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