ACOPower 20A ProteusX Waterproof PWM Solar Charge Controller

The ACOPower ProteusX 20A Waterproof PWM Solar Charge Controller Brings Simple, Weatherproof Charging to 12V and 24V Solar Systems

The ACOPower ProteusX 20A Waterproof PWM Solar Charge Controller is a 20 amp pulse width modulation controller for 12 volt and 24 volt battery systems. It detects the system voltage automatically and handles up to 360 watts of solar on a 12V battery or 720 watts on a 24V battery. Its waterproof housing means you can mount it indoors, outdoors, on a boat or on an RV without a separate enclosure.

A large blue backlit LCD shows battery voltage, charging current, amp hours, battery type, state of charge, battery temperature and error codes, and colored LEDs show charging status at a glance. Eight battery presets cover common lead-acid and lithium chemistries.

ACOPower ProteusX 20A Waterproof PWM Solar Charge Controller Features

Eight Battery Types Including Lithium

Choose from Lithium-ion, LiFePO4, LTO, Gel, AGM, Flooded (WET), Lead Crystal and Calcium. Each preset uses its own absorption and float voltages. AGM is the default, so check your battery type before connecting solar.

Five-Stage Charging

Charging moves through soft start, bulk, absorption, equalization (for flooded and calcium batteries) and float stages. This brings deeply discharged batteries up gently, fills them completely, and then holds them at a safe maintenance voltage.

Waterproof, Solid-State Design

The ProteusX is IP65 rated and 100% solid state, with no fans or internal fuses. It supports surface or flush panel mounting.

Negative Ground

The common negative grounding design matches the way most vehicles, RVs and boats are wired.

Built-In Protection

The controller protects against reverse polarity or short circuit on the panel or battery side, reverse current from the battery to the panels at night, over-temperature and over-voltage. Night standby draw is 5mA or less, so it will not drain a parked battery.

Temperature Sensor Port

A port for an optional external battery temperature sensor allows automatic temperature compensation for batteries in hot or cold spaces.

Real-World Applications

RV and van roofs. Charge a 12V house battery from one to three 100W panels.

Boats. The waterproof housing handles spray and damp compartments.

Sheds and gates. Keep a 12V or 24V battery charged for lights, openers or cameras.

Battery maintenance. Keep seasonal vehicles and equipment batteries topped up.

How It Compares to Common Alternatives

Versus MPPT controllers. MPPT controllers such as ACOPower's Midas series convert extra panel voltage into current and allow panels in series. PWM is simpler and lower in cost and works well when panel voltage closely matches the battery, as with 12V panels on a 12V battery.

Versus the ProteusX kit with clips. ACOPower also offers this controller with alligator clips, solar connectors, an SAE plug and a fuse for portable charging.

Versus small 5A and 10A controllers. The 20A rating leaves room to add panels later.

Is This Charge Controller the Right Fit

• Battery bank. 12V or 24V lead-acid, lead crystal, calcium or lithium.
• Solar array. Up to 360W at 12V or 720W at 24V, with panel voltage matched to the battery (12V panels for 12V batteries).
• Wiring. Terminals accept stranded wire up to 6 AWG.
• Location. IP65 rated for indoor or outdoor mounting.

This may be a good fit if

• You want a simple, low-cost controller for a small system
• You need a waterproof controller for an exposed location
• You have lithium or lead-acid batteries
• You are building a permanent RV, boat or cabin system

Common Questions

Does It Work With LiFePO4 Batteries?

Yes. Select the LFP preset. Lithium-ion and LTO presets are also available.

Does It Detect 12V or 24V Automatically?

Yes. Connect the battery first so the controller can identify the system voltage, then connect the solar panels.

How Many Panels Can I Connect?

Up to 360W of 12V panels on a 12V battery, such as three 100W panels in parallel, or up to 720W on a 24V system.

Can It Be Mounted Outside?

Yes. The housing is IP65 rated, though shading it from direct sun keeps it cooler.

What's Included

• 1 x ACOPower ProteusX 20A Solar Charge Controller
• 1 x User Manual

Dependable PWM Charging in a Weatherproof Package

The ACOPower ProteusX 20A Waterproof PWM Solar Charge Controller pairs eight battery presets and a clear backlit display with an IP65 housing. At Outbound Power, we help customers choose the right controller for their panels and batteries. If you have questions, our team is happy to help.