UT Series PWM Solar Charge Controller | Complete Guide for Off-Grid PV Systems
What is the UT Series PWM Solar Charge Controller?
The UT series PWM solar charge controller is a cost-effective battery regulator specially built for off-grid photovoltaic power systems. Available in UT20, UT40 and UT60 models, it covers rated charging current from 10A up to 60A, supporting automatic 12V/24V system recognition with optional 48V compatibility.
As the core component between solar panels, batteries and DC loads, this PWM solar controller manages battery charging and discharging, prevents overcharge and deep discharge, and safeguards your battery bank to extend its service life. Widely adopted in solar street light projects, remote monitoring stations, mountain cabins and RV off-grid solar kits, it balances reliable performance and competitive pricing for solar installers, project contractors and DIY solar enthusiasts.
Key Features of UT PWM Solar Charge Controller
Wide Current & Voltage Selection Three models (UT20 / UT40 / UT60) deliver charging current from 10A to 60A. It automatically detects 12V or 24V battery systems without manual adjustment, and supports optional 48V working voltage. The maximum PV open circuit voltage reaches up to 100V, bringing more flexibility for solar panel series connection.
Multi-Battery Compatibility + Custom Lithium Battery Support This solar regulator works with Gel, SLA sealed lead-acid and flooded batteries. One standout advantage is that we offer parameter customization for lithium battery packs, helping you build diverse off-grid energy solutions beyond traditional lead-acid systems.
3-Stage PWM Charging & Temperature Compensation It adopts multi-stage PWM charging management: absorption, float and equalization charging. Built-in temperature compensation automatically adjusts charging voltage according to ambient temperature. This function is critical for outdoor projects under extreme hot or cold environments, avoiding battery damage from overcharging or undercharging. The working temperature ranges from -20℃ to +55℃, stable for harsh field deployment.
Smart Load Modes for Solar Street Lights Three flexible load control modes are integrated: 24-hour continuous power output, light control, and light plus timing control. With light & timer function, the load will turn on automatically at dusk and shut down after preset hours, which makes it the ideal controller for solar street lights, landscape lamps and remote site lighting projects.
User-Friendly LCD & USB Output Equipped with a color LCD display, users can check real-time battery voltage, SOC, PV voltage and charging status directly on screen. Two physical buttons allow installers to adjust parameters easily. The built-in 4-way USB port supplies power for small electronics like mobile phones, cameras and portable devices, perfect for RV and cabin off-grid users.
Full Safety Protection System Multiple protective functions are pre-installed: overcharge protection, over-discharge protection, overload protection, short-circuit protection and reverse polarity protection. If wiring is connected incorrectly on site, the controller will not burn out immediately, greatly lowering failure risk and after-sales troubles for engineering projects. Natural heat dissipation with heat sink ensures stable operation under high current.
Main Applications of UT Series Solar Charge Controller
The UT PWM solar charge controller is designed for off-grid DC solar systems without grid connection. Common application scenarios include:
- Solar street lights, garden landscape lights and highway warning lighting
- Remote monitoring, forest fire monitoring, hydrological & meteorological stations
- Off-grid power supply for remote cabins, mountain houses and island micro power systems
- RV, campervan and boat solar energy storage systems
- Farm solar irrigation, agricultural outdoor DC equipment
UT20 / UT40 / UT60 Model Comparison
- UT20: Max charging current 20A, PV input power 130W@12V / 260W@24V, dimension 1659537mm
- UT40: Max charging current 40A, PV input power 520W@12V /1040W@24V, dimension 17610644mm
- UT60: Max charging current 60A, PV input power780W@12V /1560W@24V, dimension18512250mm
FAQ
Q1: What battery types can this UT solar controller support?
A: Standard version supports Gel, SLA and flooded lead acid batteries. Lithium battery parameter customization is available upon request.
Q2: Can it work for solar street lights?
A: Yes. It supports light control and light+timing load modes, which is widely used for solar street light projects.
Q3: Is this an MPPT controller?
A: This is a PWM solar charge controller. It is cost-effective for medium & small off-grid solar projects. For maximum power tracking and higher power gain, please check our MPPT controller series.
Q4: What protection functions are included?
A: Overcharge, over-discharge, overload, short-circuit and reverse connection protection. It also has temperature compensation to protect batteries under wide temperature range.
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