Description
Enerdrive EN43520 20A MPPT Solar Charge Controller 12/24V
A 20A MPPT solar charge controller for 12V and 24V systems, the Enerdrive EN43520 uses advanced MPPT control algorithm with up to 99.5% tracking efficiency and 98.3% maximum DC/DC transfer efficiency, with self-adaptive three-stage charging, LCD display, IP33 protection, and RS485 communications port.
Product Overview
The Enerdrive EN43520 is a 20A MPPT solar charge controller designed for 12V and 24V DC systems with automatic voltage selection. It supports recommended PV array power of up to 300W at 12V and 600W at 24V, with overdrive capability up to 360W at 12V and 720W at 24V. The MPPT control algorithm minimises maximum power point loss rate and loss time, tracking the MPP of the PV array to extract maximum energy under any conditions, delivering 20-30% greater energy utilisation compared to PWM charging methods.
The EN43520 uses a self-adaptive three-stage digital charging mode to prolong battery lifespan and improve system performance, and supports both lead-acid and lithium battery types. Comprehensive electronic protection covers overcharge, over discharge, and PV and battery reverse polarity. The MPPT voltage range runs from battery voltage plus 2V up to 72V, with maximum PV open circuit voltage of 100V at minimum operating temperature and 92V at 25°C. The unit includes an LCD display with configurable backlight timeout, an RS485 interface via RJ45 for communications, and IP33 ingress protection with isolated RS485 design. CE certified to LVD EN/IEC62109 and EMC EN61000-6-1/3. Suitable for RV, marine, remote off-grid monitoring, and other applications.
Features & Benefits
Advanced MPPT Control Algorithm - Up to 99.5% Tracking Efficiency: The EN43520 uses an advanced MPPT algorithm with ultra-fast tracking speed to minimise MPP loss rate and loss time, accurately recognising and tracking multi-peak maximum power points for up to 99.5% tracking efficiency across varying solar conditions.
98.3% Maximum DC/DC Transfer Efficiency: Maximum DC/DC transfer efficiency of 98.3% ensures minimal energy loss between the PV array and battery bank, maximising the usable energy yield from the connected solar panels.
20-30% Greater Energy Utilisation than PWM Charging: The MPPT charging method increases the ratio of energy utilisation in the solar system by 20-30% compared with PWM charging methods, delivering more charge to the battery from the same PV array.
Self-Adaptive Three-Stage Charging Mode: The digital control circuit-based three-stage charging mode adapts to battery conditions to effectively prolong battery lifespan and improve overall system performance across both lead-acid and lithium battery types.
Supports Lead-Acid and Lithium Batteries: The EN43520 is compatible with both lead-acid and lithium battery systems. When lithium batteries are used, the system voltage cannot be identified automatically and the temperature compensation coefficient must be set to 0.
12/24V Auto-Select Nominal Voltage: The EN43520 automatically selects 12V or 24V operation based on the connected battery system, supporting battery voltage ranges from 8V to 32V. Automatic voltage selection is not available when lithium batteries are used.
Comprehensive Electronic Protection: Built-in protection covers overcharge, over discharge, and PV and battery reverse polarity, protecting both the controller and connected battery and PV systems from common fault conditions.
LCD Display with Configurable Backlight: The integrated LCD display provides real-time monitoring of system data and energy statistics. Backlight timeout is configurable from 0 to 999 seconds, with OS mode keeping the backlight on continuously.
IP33 Ingress Protection with Isolated RS485: IP33 rated ingress protection and an isolated RS485 interface via RJ45 connector improve reliability in RV, marine, and remote installation environments and support communications for future application integration.
Automatic Power Reduction Over Temperature: When internal temperature reaches 81°C, the controller automatically reduces charging power to protect the unit, allowing full load operation across the -25°C to +50°C environmental temperature range below this threshold.
CE Certified: The EN43520 holds CE certification to LVD EN/IEC62109 and EMC EN61000-6-1/3 standards.
Technical Specs
| Specification |
Detail |
| SKU |
EN43520 |
| Brand |
Enerdrive |
| Nominal Voltage Range |
12/24V DC Auto Select |
| Battery Voltage Range |
8-32V |
| Maximum Battery Current Output |
20A |
| Maximum Load Current Output |
20A |
| Maximum PV Open Circuit Voltage |
100V (at minimum operating temperature), 92V (at 25°C) |
| MPPT Voltage Range |
(Battery Voltage + 2V) to 72V |
| Maximum PV Array Power Recommended |
300W at 12V, 600W at 24V |
| Maximum PV Array Power Allowed (Overdrive) |
360W at 12V, 720W at 24V |
| Maximum Efficiency |
98.3% |
| Tracking Efficiency |
Up to 99.5% |
| Self Consumption |
30mA (12V), 16mA (24V) |
| Temperature Compensation Coefficient |
-3mV/°C/12V (default) |
| Grounding |
Common Negative |
| RS485 Interface |
5VDC/200mA (RJ45) |
| LCD Backlight Timeout |
Default 60s, Range 0-999s |
| Battery Types Supported |
Lead-Acid, Lithium |
| IP Rating |
IP33 |
| Environmental Temperature |
-25°C to +50°C |
| Storage Temperature |
-20°C to +70°C |
| Relative Humidity |
95% N.C. |
| Dimensions (L x W x H) |
217 x 158 x 56.5mm |
| Mounting Hole Dimensions |
160 x 149mm |
| Mounting Hole Size |
5mm |
| Maximum Cable Size |
10AWG (6mm²) |
| Recommended Cable Size |
10AWG (6mm²) |
| Certification |
CE (LVD EN/IEC62109, EMC EN61000-6-1/3) |
Compatible With
The EN43520 is compatible with 12V and 24V DC battery systems including lead-acid and lithium batteries within a voltage range of 8-32V. The MPPT voltage range of battery voltage plus 2V to 72V supports a wide range of PV panel configurations. Maximum recommended PV array power is 300W at 12V and 600W at 24V. Overdrive is supported up to 360W at 12V and 720W at 24V. When lithium batteries are used, automatic voltage selection is not available and the temperature compensation coefficient must be set to 0. Suitable for RV, marine, remote off-grid monitoring, and similar applications.
Frequently Asked Questions
What is the difference between MPPT and PWM solar charge controllers?
MPPT (Maximum Power Point Tracking) controllers continuously track the maximum power point of the PV array and convert excess voltage into additional charge current, increasing energy utilisation by 20-30% compared to PWM (Pulse Width Modulation) controllers. PWM controllers directly connect the PV array to the battery and do not optimise power conversion. The EN43520's advanced MPPT algorithm achieves up to 99.5% tracking efficiency with a maximum DC/DC transfer efficiency of 98.3%.
Does the EN43520 support lithium batteries?
Yes. The EN43520 supports lithium batteries. When lithium batteries are used, the system voltage cannot be identified automatically and must be configured manually. The temperature compensation coefficient must also be set to 0 when using lithium batteries.
What is the maximum solar panel wattage I can connect to the EN43520?
The recommended maximum PV array power is 300W for a 12V system and 600W for a 24V system. Overdrive operation is supported up to 360W at 12V and 720W at 24V. The maximum PV open circuit voltage is 100V at minimum operating temperature and 92V at 25°C.
What does the RS485 interface on the EN43520 provide?
The EN43520 includes an RS485 communications port via RJ45 connector rated at 5VDC/200mA. The isolated RS485 design improves controller reliability and supports communications connectivity for future application integration and remote monitoring setups.
What protection does the EN43520 include?
The EN43520 provides comprehensive electronic protection covering overcharge, over discharge, and PV and battery reverse polarity. Automatic power reduction activates when the internal temperature reaches 81°C. The unit is also IP33 rated for ingress protection.
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