Product overview A compact 100A solar charge controller designed for small to medium offgrid systems. The controller supports fast charging for mobile devices, plugs directly into a DC5521equipped solar regulator to reduce wiring, and offers multiple builtin protections to prolong battery life and protect connected equipment. Key benefits Fast charging for devices: Dual USB ports plus a TypeC port support fast charge protocols for quicker charging of phones and power banks. USB output: 5V. Simple installation: DC5521 interface connects directly to compatible solar controllers, reducing wiring complexity and installation time. Robust battery protection: Integrated protections include discharge time accumulation, reverse discharge prevention, undervoltage protection, reverse connection protection, overload protection, and short circuit protection. Flexible battery support: Works with 12V and 24V systems and supports common leadacid types (open, sealed, gel). Also supports certain lithium packs (including 12V and 4V lithium ion packs and LFP packs) with automatic identification and manual adjustment where required. Refer to the manual for supported battery chemistries and setup instructions. PV panel direct drive: Can be driven directly by a photovoltaic panel as the charging source; do not use DC supplies other than PV panels for charging. Specifications Model size: 100A (also available in 70A and 80A product current versions) Item type: Solar controller Material: ABS Weight: Approx. 120 g / 4.2 oz USB output: 5V Operating current: 100A (model); other options: 70A, 80A Output mode: USB Operating temperature: 35 to +60 C Interface: DC5521 Safe and correct use (summary) The controller autoadapts to 12V and 24V systems. Ensure the battery has sufficient voltage on first installation so the controller can detect the correct battery type. Mount the controller as close to the battery as practical to minimize voltage drop from long wiring, which can affect voltage sensing. Compatible battery types include leadacid variants and supported lithium packs as noted above. Do not use unsupported battery chemistries such as NiMH or other nonlisted types. Use only photovoltaic panels as the charging source; do not use external DC supplies as the PV input. The controller can become warm during operation. Install on a flat, well ventilated surface. Package contents 1 x Solar controller 1 x Manual Typical applications RV and caravan solar systems for device charging and battery maintenance. Offgrid cabin or boat setups to manage battery charging from rooftop or portable PV panels. Portable solar charging stations for camping, outdoor work sites, and emergency backup power where USB device charging and battery protection are required. This controller provides fastdevice charging, straightforward installation via DC5521, and multilevel battery protection in a compact ABS housing suitable for a wide range of smallscale solar installations.