Rich Solar 20 Amp MPPT Solar Charge Controller 1 / 11
RICH SOLAR

Rich Solar 20 Amp MPPT Solar Charge Controller Rich Solar 20 Amp MPPT Solar Charge Controller

SKU: RS-MPPT20

Brand RICH SOLAR In Stock
$89.99 In Stock
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Key features
  • Discharge Circuit Voltage Drop ≤0.15 V
  • Conversion Efficiency ≤98%
  • MPPT Tracking Efficiency >99%
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Rich Solar 20 Amp MPPT Solar Charge Controller
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Rich Solar 20 Amp MPPT Solar Charge Controller

In Stock
Rich Solar 20 Amp MPPT Solar Charge Controller
Quantity$89.99 each
1
Rich Solar • Compact MPPT Charge Controller

Rich Solar RS-MPPT20 20 Amp MPPT Solar Charge Controller

The Rich Solar RS-MPPT20 is a compact 20A MPPT solar charge controller designed for 12V and 24V battery-based solar systems. With automatic voltage recognition, support for Sealed, Gel, Flooded, and Lithium batteries, MPPT tracking efficiency up to 99%, peak conversion efficiency of 98%, LCD and LED monitoring, electronic protection features, load control, heat-dissipating die-cast aluminum construction, and RS232 support for the BT-1 Bluetooth module, it gives smaller RV, van, boat, cabin, shed, and off-grid solar systems a smarter charging foundation.

RS-MPPT20 controller 20A MPPT charging 12V / 24V auto recognition 100VDC max solar input Up to 99% MPPT tracking BT-1 module compatible
Rich Solar RS-MPPT20 20 Amp MPPT solar charge controller for 12V and 24V battery systems
20A Rated battery current and rated load current for compact solar charging systems.
12V / 24V Automatically recognizes common 12V and 24V DC battery system voltages.
100VDC Maximum listed solar input voltage for properly designed PV array configurations.
99% / 98% Up to 99% MPPT tracking efficiency and 98% peak conversion efficiency.

Product Overview

The RS-MPPT20 is designed for customers who want MPPT charging performance in a smaller controller size. It regulates solar power from the panel array to a compatible battery bank and helps improve charging efficiency compared with basic PWM-style controller setups.

This controller is a strong fit for RV solar kits, camper vans, small travel trailers, boats, sheds, cabins, and DIY battery-based solar systems where a 20A MPPT controller is properly sized for the panel array and battery bank.

Rich Solar 20A MPPT solar charge controller outdoor view with LCD display and LED indicators

Built for Smaller 12V and 24V Solar Charging Systems

The RS-MPPT20 is best for systems that need efficient MPPT charging without stepping up to a larger 30A, 40A, or 60A controller. It is compact enough for mobile installs while still offering battery compatibility, display visibility, load control, and protection features.

RV & Trailer Solar A practical controller for smaller RV, camper, and travel trailer panel arrays used for camping and battery charging.
Camper Vans & Mobile Power Useful for van conversions and compact mobile builds that need efficient solar charging without oversizing the controller.
Boat & Marine Charging A good fit for compatible boat and marine battery systems where solar charging, protection, and system visibility matter.
Cabins, Sheds & DIY Off-Grid Works for small cabins, sheds, remote buildings, and DIY systems that need a compact 20A MPPT charging solution.

Key Features That Matter

This description keeps the focus on the real buying decision: MPPT energy harvest, 20A controller sizing, 12V/24V auto recognition, battery compatibility, solar input limits, display monitoring, protection features, and heat dissipation.

Front view of Rich Solar RS-MPPT20 20A MPPT charge controller showing LCD screen and orange control buttons
Automatic 12V / 24V Recognition

The RS-MPPT20 automatically recognizes 12V or 24V DC system voltage, helping simplify setup for common battery banks used in RV, van, boat, cabin, and off-grid solar systems.

Angled outdoor view of Rich Solar 20 Amp MPPT solar charge controller with display and indicators
Advanced MPPT Solar Charging

MPPT technology helps the controller locate the best operating point from the solar array. With tracking efficiency up to 99% and peak conversion efficiency of 98%, it helps improve usable charging performance from connected panels.

Terminal view of Rich Solar RS-MPPT20 showing PV battery load temperature sensor and RS232 connections
Battery, Load, and RS232 Connections

The controller includes PV, battery, load, temperature sensor, and RS232 connection points. The RS232 port allows communication with the BT-1 Bluetooth module when paired with the correct accessory.

Rear heat sink view of Rich Solar 20 Amp MPPT charge controller showing die-cast aluminum heat dissipation design
Die-Cast Aluminum Heat Dissipation

The die-cast aluminum design helps dissipate heat during operation, supporting more reliable performance in compact electrical compartments when installed with proper ventilation.

System Monitoring and Protection

The LCD screen and multiple LED indicators display system operation information, customizable parameters, and error codes. That gives customers better visibility into battery charging status, controller behavior, and possible system issues.

Built-in electronic protection helps guard against reverse polarity, overcharging, over-discharging, overload, short-circuiting, and reverse current. The controller also supports diverse load control and can charge over-discharged lithium batteries when used within the correct system setup.

Rich Solar RS-MPPT20 MPPT charge controller with external temperature sensor accessory

Important System Specs

The RS-MPPT20 should be matched to the solar array, battery bank, wiring, and protection equipment. It is smaller than the 30A and 40A controller options, which makes system sizing especially important.

20A Rated Battery Current Designed around a 20A rated battery current for properly sized 12V or 24V solar charging systems.
20A Rated Load Current Includes a 20A rated load current for compatible DC load-control applications.
25A Max PV Input Short Current Solar array design should stay within the listed PV input short-current limit.
100VDC Max Solar Input Panel wiring must remain within the controller’s maximum listed solar input voltage.

Best Uses

  • Small RV solar charging systems
  • Camper vans and travel trailers
  • Boat and compatible marine solar battery systems
  • Cabins, sheds, and small remote buildings
  • DIY off-grid solar battery banks
  • 12V and 24V DC solar charging systems
  • Sealed, Gel, Flooded, and Lithium battery charging
  • Compact solar kits that need a 20A MPPT controller
  • Customers upgrading from basic PWM charging to MPPT charging
  • Solar arrays that do not require a larger 30A or 40A controller

Key Benefits

  • 20A MPPT solar charge controller
  • Automatically recognizes 12V and 24V DC system voltages
  • Compatible with Sealed, Gel, Flooded, and Lithium deep-cycle batteries
  • MPPT tracking efficiency up to 99%
  • Peak conversion efficiency of 98%
  • 20A rated battery current
  • 20A rated load current
  • 25A max PV input short current
  • 100VDC maximum solar input voltage
  • 32V maximum battery voltage
  • LCD screen with multiple LED indicators
  • Displays operation information, customizable parameters, and error codes
  • Electronic protection against reverse polarity and reverse current
  • Protection against overcharge, over-discharge, overload, and short circuits
  • Diverse load control capability
  • Can charge over-discharged lithium batteries
  • Die-cast aluminum design for efficient heat dissipation
  • RS232 port for BT-1 Bluetooth module communication
  • Approx. 8.27 x 5.94 x 2.34 in overall dimensions
  • Approx. 3.08 lb net weight
Compatibility note: Before ordering, confirm your battery voltage, battery chemistry, solar array voltage, solar array wattage, controller current rating, PV input short current, 100VDC solar input limit, wire sizing, fuse or breaker requirements, mounting location, ventilation, load-control requirements, and whether the controller settings match your battery manufacturer’s charging requirements.

Size the charging system

Use our solar charge controller sizing guide to compare controller current and voltage limits. The MPPT versus PWM guide explains how MPPT and PWM designs differ.

Compare before you choose

Compare charge current, cold-corrected PV voltage and array-current limits against the battery system.

See the Rich Solar 30 Amp MPPT Solar Charge Controller for another RICH SOLAR charge controller option.

Rich Solar 20 Amp MPPT Solar Charge Controller
Package Includes
1x Rich Solar 20 Amp MPPT Solar Charge Controller
Includes the selected item based on the current package option.
Specifications
Selected variant SKU RS-MPPT20
Nominal System Voltage 12V/24V Auto Recognition
Rated Battery Current 20A
Rated Load Current 20A
Max. PV Input Short Current 25A
Max. Battery Voltage 32V
Max Solar Input Voltage 100 VDC
Discharge Circuit Voltage Drop ≤0.15 V
Max. Photovoltaic System Input Power 260W/12V, 520W/24V
Conversion Efficiency ≤98%
MPPT Tracking Efficiency >99%
Operating Temperature -35℃ to +45℃
Protection Degree IP32
Net Weight 3.08 lb
Overall Dimensions 8.27 x 5.94 x 2.34 in
100V Max Solar Input Voltage Supports flexible solar panel configurations.
Supports Multiple Battery Types Compatible with Sealed, Gel, Flooded, and Lithium batteries.
Bluetooth Ready Supports the optional BT-1 Bluetooth module via the RS232 communication port for wireless monitoring.
Lithium Battery Recovery Capable of charging over-discharged lithium batteries.
Designed for Long-Term Reliability Durable construction for demanding off-grid applications.
Rated Charging Current 20A
Battery Voltage Range 9 - 35 VDC
📘
User Manual
Installation instructions, setup guidance, operation, and troubleshooting.
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📄
Specification Sheet
Technical specifications, dimensions, electrical ratings, and certifications.
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📘
User Manual
Installation instructions, setup guidance, operation, and troubleshooting.
View PDF

Frequently Asked Questions

Clear answers to common questions about this product, setup, compatibility, and use.

Can my planned series-parallel array safely feed the 20 Amp MPPT Solar Charge Controller? The official limits list recommended PV power 260W/12V, 520W/24V, published PV voltage limit or range 100 VDC. Check the final series-parallel array against voltage, current, and power simultaneously, including open-circuit voltage in the lowest expected temperature. A panel layout can fit the wattage recommendation and still exceed the controller's voltage or current limit. What practical difference does MPPT operation make on the 20 Amp MPPT Solar Charge Controller? This is an MPPT controller, so it can track the array's operating point and convert available PV voltage into battery-charging power within its published limits. That does not make every high-voltage string compatible: the array must remain inside the controller's input and tracking ranges. How should the 20 Amp MPPT Solar Charge Controller be matched to a specific battery? The published system-voltage information is 12V/24V Auto Recognition. RICH SOLAR lists: Compatible with various deep cycle battery options: Sealed, Gel, Flooded, and Lithium. Confirm the selected profile, charge voltages, temperature behavior, BMS limits, and equalization rules against the exact battery manufacturer. A chemistry name by itself is not enough to approve the settings. When can the 20 Amp MPPT Solar Charge Controller actually approach its published amp rating? 20A is the published charging or controller-current figure, not a guaranteed all-day output. Actual battery current depends on usable panel power, sunlight, array voltage, battery voltage, charging stage, battery acceptance, temperature, wiring loss, and any loads consuming solar energy while charging. Does the 20 Amp MPPT Solar Charge Controller communicate with an app without a separate radio module? Bluetooth is not listed as built in. The official page identifies communication through the optional BT-1 Bluetooth module, so include that accessory if phone monitoring is required. A communications port alone does not put the controller online. Where should the IP32-rated 20 Amp MPPT Solar Charge Controller be installed? IP32 is the published enclosure or protection grade for this exact controller. Use it to judge exposure rather than assuming every “RV,” “marine,” or “waterproof” controller can be mounted anywhere. Protect connections, follow the specified mounting orientation, preserve cooling, and avoid conditions beyond the rating.