Dyness 40A MPPT Solar Charge Controller 12V/24V with Bluetooth, App Monitoring & Multi-Battery Support

Dyness 40A MPPT Solar Charge Controller is a Bluetooth-enabled 12V/24V regulator that maximizes solar harvest and lets you monitor and adjust charging from a mobile app.

Designed for small to mid-size off-grid and backup systems, this Dyness controller blends advanced MPPT tracking with built-in Bluetooth, comprehensive protections and flexible load control. It supports multiple battery chemistries and steps in when weather changes to optimize power from your PV array. The unit accepts PV input under 100Voc and handles up to 600W at 12V or 1200W at 24V, making it a practical option for RVs, cabins, tiny homes and auxiliary power systems.

How does this controller improve solar charging efficiency?

The Dyness 40A MPPT controller continuously tracks solar panel output and applies several MPPT algorithms to find the best operating point under shifting irradiance and temperature. That adaptive approach reduces energy loss compared with traditional PWM controllers and less sophisticated MPPT units.

• Multiple MPPT algorithms for varied weather conditions
• Fast maximum power point tracking to capture extra watts
• High conversion efficiency for 12V and 24V systems
• PV input kept below 100Voc for safe operation

Can I monitor and control the system from my phone?

Yes — the controller includes built-in Bluetooth and pairs with an iOS or Android app to show real-time solar, battery and load data. The app also lets you adjust charging profiles, control DC loads and view up to 300 days of historical operation for troubleshooting and performance review.

• Direct Bluetooth connection, no gateway required
• Live readouts for PV current, battery voltage and load status
• Adjustable charging settings and user-defined battery options
• Storage of up to 300 days of operation history in the app

What battery types and voltages does it support?

The Dyness controller works with 12V and 24V systems and supports several battery chemistries, including lithium, AGM, gel and flooded lead-acid. The controller auto-detects typical lead-acid voltages for 12V/24V systems; for lithium batteries, choose the correct voltage profile in the app or on the LCD to ensure proper charging behavior.

• Automatic 12V/24V recognition for lead-acid systems
• Manual selection required for lithium battery profiles
• Compatible with AGM, gel, flooded and user-defined types
• Settings accessible through LCD or Bluetooth app

What protections and control features are included?

This MPPT charge controller includes a full suite of protection measures to safeguard panels, battery and loads. It also provides flexible load control options—light-control, timer and manual modes—plus RS485 Modbus communication and optional parallel operation for higher charging current.

• Overcharge and over-discharge protection for the battery
• PV overvoltage, overheating and short-circuit safeguards
• 20A DC load output with selectable control modes
• RS485 Modbus and optional dual-controller parallel charging

Who is this for: The Dyness 40A MPPT controller is intended for homeowners, RV and marine owners, off-grid hobbyists and installers who need reliable MPPT tracking with smartphone monitoring for 12V or 24V battery systems. It's a good fit where moderate power handling (up to 600W at 12V or 1200W at 24V), flexible battery compatibility and advanced protections are required, while offering straightforward app-based oversight and local LCD status for everyday use.