EPEVER LS Series 10A PWM Solar Charge Controller 12V 24V Auto LS1024EU

Reliable PWM (Pulse Width Modulation) solar charge controller with automatic 12V/24V voltage detection for small to medium off-grid solar systems. Model LS1024EU delivers 10A charging capacity with comprehensive battery protection, LCD display, and dual USB outputs for device charging. Ideal for RVs, boats, cabins, and backup power systems up to 240W (12V) or 480W (24V).

⚡ Key Benefits

• ✅ Auto voltage detection — 12V or 24V battery systems recognized automatically
• ✅ Dual USB outputs — 5V/2A total for smartphone and tablet charging
• ✅ LCD display — real-time voltage, current, battery %, charging status
• ✅ Multi-stage charging — bulk, boost, float for optimal battery longevity
• ✅ Comprehensive protection — overcharge, over-discharge, short circuit, reverse polarity

⚙️ Technical Specifications

Parameter	Specification
Model Number	LS1024EU (EPEVER LS Series)
Technology	PWM (Pulse Width Modulation)
Rated Charging Current	10A
System Voltage	12V or 24V (auto-detect)
Maximum PV Input Voltage	50V (open circuit)
Maximum PV Input Power	240W (12V system) / 480W (24V system)
Self-Consumption	≤10 mA (standby)
Charging Regulation Voltage	14.4V (12V) / 28.8V (24V) boost; 13.8V (12V) / 27.6V (24V) float
Battery Types Supported	Sealed, Gel, Flooded (user-selectable)
Load Control	Light sensor, timer, manual on/off, voltage control
USB Outputs	2× USB Type-A (5V/2A total, 1A per port)
LCD Display	Backlit LCD showing V, A, battery %, charging/discharging icons
Temperature Compensation	-3 mV/°C/2V (automatic)
Operating Temperature	-35°C to +55°C (-31°F to 131°F)
Protections	Battery overcharge, over-discharge, PV reverse polarity, load short circuit, load overcurrent
Certifications	CE, RoHS
Dimensions (L×W×H)	147 × 70 × 35 mm (5.8 × 2.8 × 1.4 inches)
Weight	0.25 kg (0.55 lbs)
Warranty	12 months manufacturer warranty

🔋 PWM Technology: When It's the Right Choice

PWM (Pulse Width Modulation) controllers are ideal for small solar systems where panel voltage closely matches battery voltage. They regulate charging by rapidly switching the connection between solar panels and batteries on/off, maintaining voltage while preventing overcharge.

When to Choose PWM: Systems under 500W total solar capacity, 12V RV or marine setups with 12V panels, budget-conscious installations, applications where panel voltage and battery voltage are closely matched (e.g., 36-cell panels for 12V batteries).

When to Choose MPPT Instead: Systems over 1kW, cold climates where panel voltage exceeds battery voltage significantly, high-voltage panels (60-72 cells) paired with 12V/24V batteries, installations where maximizing energy harvest justifies higher controller cost.

LS1024EU Efficiency: PWM controllers achieve 75-80% efficiency when panel voltage matches battery voltage. The LS1024EU's low self-consumption (<10 mA) minimizes parasitic losses, making it suitable for systems where every watt counts.

🔌 System Sizing & Panel Compatibility

12V Systems: Connect up to 240W of solar panels (e.g., 2× 120W panels in parallel). Use 36-cell monocrystalline or polycrystalline panels with Vmp ≈17-18V. Total panel Voc must not exceed 50V (verify in cold weather when Voc increases 10-15%).

24V Systems: Connect up to 480W of solar panels (e.g., 4× 120W panels in series-parallel configuration). Use 72-cell panels with Vmp ≈35-36V. Ensure series string Voc stays below 50V.

Battery Bank Sizing: Minimum recommended battery capacity: 50Ah (12V) or 25Ah (24V). Maximum: 200Ah (12V) or 100Ah (24V). Oversized battery banks (>200Ah) take longer to fully charge with 10A controller; consider upgrading to 20A or 30A model.

🔧 Installation & Wiring Guide

Step 1 — Mount Controller: Install in a well-ventilated location away from direct sunlight, moisture, and flammable materials. Allow 10cm clearance on all sides for heat dissipation. Use provided mounting screws.

Step 2 — Connect Battery: Connect battery bank FIRST before solar panels. Use 12 AWG (12V) or 14 AWG (24V) wire. Observe polarity: red (+) to battery positive terminal, black (-) to battery negative terminal. Tighten terminal screws securely.

Step 3 — Connect Solar Panels: Wire solar panels to PV input terminals. For 12V systems, connect panels in parallel; for 24V systems, use series or series-parallel. Verify total Voc <50V. Do NOT exceed 10A combined panel current.

Step 4 — Connect Loads (Optional): If using controller to power DC loads (lights, fans, etc.), connect to load terminals. Maximum load current: 10A continuous. Do NOT connect AC inverters to load output.

Step 5 — Power On & Configure: LCD displays system voltage automatically. Press "SET" button to select battery type (Sealed/Gel/Flooded). Controller begins charging immediately if solar power is available.

📊 Understanding the LCD Display

The backlit LCD cycles through three screens every 5 seconds:

• Screen 1: Battery voltage (V), charging current (A), battery icon showing charge level (%)
• Screen 2: Load status (on/off), load current (A), load power (W)
• Screen 3: Daily energy harvested (Ah), total operating days, error codes (if any)

Icons: Sun icon = solar charging active. Battery icon = battery state of charge (empty/25%/50%/75%/full). Load icon = connected load status (on/off).

Button Functions: Short press "SET" cycles battery type. Long press (3 seconds) enters advanced settings menu for load control, voltage calibration, and timer programming.

🔋 Load Control Modes

The LS1024EU offers four load control modes accessible via the "SET" button menu:

• Manual Mode: Load output always on regardless of voltage or time. Use for critical loads that must run 24/7.
• Light Sensor Mode: Load turns on at dusk (PV voltage <5V for 10 minutes), off at dawn (PV voltage >5V for 10 minutes). Ideal for automatic outdoor lighting.
• Timer Mode: Load runs for a user-defined duration (1-14 hours) after dusk, then turns off automatically. Saves battery by limiting nighttime load usage.
• Voltage Control Mode: Load turns off when battery voltage drops below a set threshold (e.g., 11.5V for 12V system), protecting battery from over-discharge.

❓ Frequently Asked Questions

1. Is PWM sufficient for my solar system, or do I need MPPT?
PWM is sufficient for systems under 500W where panel voltage closely matches battery voltage. If your panels are high-voltage (60-72 cell) or your system exceeds 500W, MPPT delivers 20-30% more energy and justifies the higher cost. For small RV or marine systems (200-300W), PWM like the LS1024EU is cost-effective and reliable.

2. Can I upgrade to a larger controller later if I add more panels?
Yes. Solar charge controllers can be replaced without rewiring the entire system. If you expand your system beyond 240W (12V) or 480W (24V), upgrade to a 20A or 30A PWM controller, or switch to MPPT for better efficiency. The LS1024EU can remain as a backup or secondary controller.

3. What is temperature compensation, and why does it matter?
Temperature compensation automatically adjusts charging voltages based on battery temperature. Batteries require lower voltage when hot (>25°C) and higher voltage when cold (<25°C). The LS1024EU's -3 mV/°C/2V compensation extends battery lifespan by preventing overcharge in summer and undercharge in winter. This feature is automatic and requires no user intervention.

4. Can I use this controller with lithium (LiFePO4) batteries?
No. The LS1024EU is designed for lead-acid battery chemistries (Sealed, Gel, Flooded) only. Lithium batteries require different charging profiles (constant current/constant voltage) and voltage limits that the LS1024EU does not support. Use a dedicated lithium-compatible controller for LiFePO4 systems.

5. How long will this controller last in a typical off-grid system?
EPEVER LS Series controllers have a typical operational lifespan of 10-15 years in properly ventilated, moisture-free environments. The main failure mode is electrolytic capacitor degradation, which manifests as voltage regulation drift after 8-10 years of continuous use. All units include a 12-month manufacturer warranty covering defects in materials and workmanship.

6. Can I request a quote or estimate?
No quote is necessary. You can purchase this product directly through our website with transparent pricing and no hidden fees.

📦 Shipping & Delivery

This product ships from warehouses in North America, Europe, or Asia depending on your location, with typical delivery of 7-15 business days. International orders are processed through standard postal services with full tracking. Expedited shipping is not available for this item.

🛡️ Why Trust Us

We have served renewable energy enthusiasts, off-grid homeowners, and marine professionals for over 8 years, maintaining a 98% positive customer rating across 15+ countries. Our technical team personally tests every charge controller batch before shipment. We guarantee a 30-day full refund if this controller does not meet your expectations, no questions asked.

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