BougeRV Sunflow 40A MPPT Solar Charge Controller 12V/24V — Bluetooth App, Backlit LCD, Low-Temp Cut-Off

BougeRV Sunflow 40A MPPT is a high-efficiency solar charge controller that manages 12V/24V systems, supports LiFePO4 and multiple battery types, and offers app and LCD control with low-temperature cut-off protection.

This compact 40 amp MPPT regulator converts solar panel output into safe, optimized charging for RVs, boats, off-grid cabins and battery arrays. It adds smart monitoring via a backlit LCD and a Bluetooth app, incorporates temperature-aware charging to protect sensitive chemistries like LiFePO4, and packs thermal and electrical protections to keep the system running reliably under varied conditions.

How does the Sunflow 40A MPPT improve solar charging efficiency?

The controller uses maximum power point tracking to continually adjust input conditions and extract more energy from panels than PWM regulators. High tracking and conversion numbers translate to faster charging and less wasted solar potential throughout the day.

• MPPT tracking efficiency up to 99.5% for steady power harvesting.
• Peak conversion efficiency around 99% to reduce energy loss.
• Aluminum heat sink for better thermal management under load.
• Charge current adjustable from 0A to 40A to match battery needs.

What battery types and safety features are supported?

Sunflow is programmed to work with LiFePO4, sealed lead-acid variants (AGM, GEL), and other common bank types with selectable charging profiles. Built-in protections guard against conditions such as reverse polarity, overloads, short circuits and overheating, providing a safer charging environment.

• Low-temperature cut-off prevents LiFePO4 charging below 32°F to protect cells.
• Dual MOSFET circuitry minimizes reverse current and operational heat.
• Protections include over-temp, open-circuit, short-circuit and overload defenses.
• Automatic recognition of 12V/24V systems when battery is connected first.

How do I monitor and control the controller remotely?

You can use the backlit LCD for on-unit configuration and live readouts or pair the controller with the BougeRV Bluetooth app for wireless monitoring up to about 32 feet. The app shows solar input, battery state and load status and lets you adjust settings where permitted.

• Three display modes: full-featured, no-load, and viewing-only.
• Remote control and status via BougeRV app; older Solar APP may also be available.
• Screen buttons allow full configuration without the app if preferred.
• Range up to approximately 32 feet for typical Bluetooth usage.

What installation and system limits should I watch for?

Sunflow supports 12V or 24V battery systems and requires correct wiring order for proper startup. Follow the rated PV and input limits to avoid damage and ensure the controller performs as expected.

• Maximum PV input voltage: 95V; max PV power: 600W (12V) / 1200W (24V).
• Wire size recommendation: 15–8 AWG depending on run length and current.
• Rated load current listed at 20A for auxiliary loads; charging up to 40A.
• Connect battery first to wake and let the unit identify system voltage.

Who this is for: The BougeRV Sunflow 40A MPPT is aimed at RV owners, marine users, small off-grid homes and DIY solar installers who need a compact, intelligent regulator that maximizes panel output, protects modern battery chemistries like LiFePO4, and offers both local and Bluetooth app monitoring. It suits projects where efficient energy conversion, safety features and flexible control are priorities without stepping up to heavy commercial gear.