The Elejoy EL‑MU400SP is a versatile 400 W MPPT step‑up solar charge controller designed to extract maximum power from your solar panels (MPPT efficiency up to 99%) and boost output voltage to match your battery bank (24–85 V). It features a clear LED display for real-time input/output voltage and current monitoring, adjustable output settings, rugged IP66 construction, and comprehensive protections (short‑circuit, over‑current, over‑temperature, under‑voltage). Ideal for hybrid setups—from e‑bikes to off‑grid solar stations.

Features:

1. Maximum Power Point Tracking (MPPT): Continuously adjusts panel voltage to extract maximum power—even under cloudy or changing light conditions.
2. Step‑Up Boost Capability: Enables low-voltage solar panels to charge higher-voltage batteries—ideal for e‑bikes, RVs, and larger solar setups.
3. Adjustable Output Voltage: Fine-tune from 24 V to 85 V to suit lead‑acid or lithium battery chemistries.
4. LED Display & Controls: Easy setup and live monitoring of voltage and current on both input and output sides.
5. Robust Protections: Safeguards include short‑circuit, over‑current, over‑temperature (with automatic derating/shutdown), and under‑voltage cut-off.
6. Weatherproof Build: IP66 rating ensures dust and water resistance, suitable for outdoor installations.
7. High Efficiency & Low Standby Loss: Delivers MPPT tracking efficiency up to 99%, DC‑DC conversion efficiency ~97%, and draws just ~0.5 W when idle.
8. Compact & Durable: Solid aluminum housing (120 × 80 × 40 mm, ~450 g), operates across –40°C to +65°C.

Package Includes:

1 x MPPT Step-Up Solar Charge Controller EL-MU400SP 400W