Battery Tender 5W-45W Automatic Solar Controller

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Battery Tender 5W-45W Automatic Solar Controller is a smart charge controller that lets you use an existing solar panel as a battery maintainer. It adds automatic charge control so the panel can maintain a battery without overcharge. Best for Best for converting an existing panel: turns a raw solar panel into a regulated maintainer Best for small solar setups: supports 5–45W panels panels with up to 3A output Best for unattended storage: 3-stage control and automatic on/off based on battery voltage Key technical details SKU: 021-1162 UPC: 734357116205 Supported panel size: 5–45W panels Max input voltage: 32VDC Max output current: 3A Charge control: 3-stage solar charge control What it does: convert a standard solar panel into a smart battery maintainer Quick technical Q&A Will it work with any solar panel? As long as the panel falls within the supported wattage and input-voltage limits, it can be used. Stay under the controller’s max input voltage. What batteries can it maintain? Use the controller’s settings for the battery voltage/system you’re maintaining. Confirm chemistry and voltage before connecting. Do I still need a fuse? Yes—use appropriate inline fusing close to the battery to protect wiring and connections. Show more