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Features: 1. Automatically manage the working of solar panel and battery in solar system. 2. Overloading and short-circuit protection. 3. Build-in short-circuit protection, open-circuit protection, reverse protection, over-load protection. 4. Protection from lightning strike. 5. Prolong the battery life cycle and keep the load work well. 6. Easy to set up and operate. 7. Suitable for small solar energy system. Specifications: - Batt voltage: 12V/24V auto - Charge current: 30A - Discharge current: 30A - Max Solar input: