MgcSTEM Low Voltage Disconnect & Charging/Discharging Protector 2PCS 40A 5–60V with LCD

This dual-purpose protector combines automatic low-voltage cutoff and overcharge protection into one 40A, 5–60V module with an easy-to-read LCD and configurable timers. It is designed for solar systems, battery banks, and DIY power projects that need reliable disconnect and reconnection behavior without continually draining the battery. Settings are stored in internal flash so your preferred cutoffs, delays, and modes remain after power loss.

How does the module prevent battery damage without draining the battery itself?

The unit offers two protection modes: charging mode to stop charging when a preset voltage is reached, and discharging mode to disconnect the load when battery voltage falls below a set threshold. It supports a manual mode that consumes zero power after relay disconnection, and an automatic low-power standby that keeps standby current to about 5mA.

• Manual mode: 0 mA after relay opens; requires button reset.
• Automatic mode: LED and electronics sleep after 60s; ~5mA standby at 18V.
• Internal flash preserves settings after power loss.
• 40A relay handles high-current loads without added hardware.

What adjustable timers and delays can I use for startup and shutdown?

The module includes flexible timing controls so you can prevent false triggers from temporary voltage dips or delay reconnection until conditions stabilize. Timers cover short start delays, disconnect delays, and long-duration scheduled cutoffs for maintenance or load cycling.

• Start delay up to 99 seconds to avoid surge-related trips.
• Disconnect delay up to 99 seconds for transient protection.
• Disconnect timer up to 99:59:59 hours for scheduled shutdowns.
• Set and view values using the built-in LCD and buttons.

What voltages and currents are supported, and how will this fit in my system?

This protector runs across a wide DC range and supports heavy loads, making it suitable for most 12V, 24V, and higher-voltage battery assemblies up to 60V. It’s compact enough for panels, controllers, and battery boxes while using a beefy relay rated for continuous 40A operation.

• Operating voltage: DC 5V to 60V — fits small to large battery banks.
• Maximum continuous current: 40A for common inverter and load demands.
• Works with solar charge setups in charging mode to stop overcharge.
• Clear LCD shows real-time voltage and configured thresholds.

Who is this for? Installers, hobbyists, and system builders who need a dependable, configurable low-voltage cutoff and overcharge protector will benefit from the MgcSTEM 2-in-1 module. It’s ideal for off-grid solar arrays, backup battery packs, RVs, marine systems, and any project that needs automatic disconnect/reconnect behavior without high standby drain. Choose manual mode when you want absolute zero post-disconnect consumption, or automatic mode for hands-off operation with low-power standby and quick recovery when voltage returns.