PowMr 30A PWM Solar Charge Controller – Auto 12/24/36/48V with LCD and Dual USB, 100V PV Input

PowMr 30A PWM solar charge controller is a multi-voltage, feature-packed regulator that auto-detects 12V/24V/36V/48V systems, manages up to 30A of charging current, and includes an LCD plus dual USB outputs for convenient device charging.

This updated PowMr controller combines three-stage PWM charging, selectable battery types, and built-in protections to coordinate solar panels, batteries, and loads in small off-grid setups, RVs, cabins, and backup power arrays. The unit accepts PV input voltages up to 100V and supports a wide range of battery chemistries (Flooded, AGM, GEL, Lead-Acid, LiFePO4 and other lithium types), letting you tailor charge parameters on the LCD. Installation follows the recommended sequence—battery, solar panel, then load—to prevent configuration errors.

How does the controller adapt to different system voltages and solar array sizes?

The PowMr 30A automatically senses the connected battery system and configures itself for 12V, 24V, 36V, or 48V operation. Maximum recommended PV input changes with system voltage so the controller stays within safe charging power limits.

• Auto-detects 12V/24V/36V/48V systems upon connection.
• PV input voltage tolerance up to 100V for flexible panel layouts.
• Recommended max PV wattage: 360W (12V), 720W (24V), 1080W (36V), 1440W (48V).

What charging strategy does it use and how does that benefit my battery?

The controller employs a three-stage PWM charging method—Bulk, Boost, and Float—that balances charge speed and battery health. This staged approach brings batteries up quickly, finishes charging efficiently, and maintains float voltage to reduce self-discharge without overcharging.

• Bulk stage delivers higher current for fast recovery.
• Boost stage raises voltage to complete charging safely.
• Float stage maintains a lower voltage for long-term storage.

Which battery chemistries and protections are supported?

PowMr built this controller to be adaptable: you can select common battery types including flooded, GEL, AGM, and lithium variants so the charging profile matches the battery. Multiple safety features protect both the battery and connected loads from electrical faults and misuse.

• Selectable battery profiles: Flooded, AGM, GEL, LiFePO4, and custom lithium settings.
• Protections include overcharge, overload, short-circuit, reverse-current, and reverse-polarity safeguards.
• Recommended connection order: battery first, then solar panels, then loads to prevent configuration errors.

What convenience features does the controller provide for monitoring and devices?

The integrated LCD gives real-time status, parameter configuration and historical readouts so you can tune settings without extra tools. Two USB ports deliver 5V/2A output for charging phones, tablets, and accessories directly from the controller.

• Clear LCD for voltage, current, and charging stage readouts.
• User-adjustable parameters accessible through the on-unit menu.
• Two USB outputs (5V/2A) for small device charging from the system.

Who is this for: The PowMr 30A PWM controller is aimed at DIY solar installers, RV and caravan owners, small off-grid cabin projects, and homeowners adding a charge regulator to a battery-backed solar circuit. It suits anyone who needs an affordable, configurable controller with multi-voltage auto-detection, standard safety protections, and basic device-charging convenience without moving to an MPPT class price point.