The scenario
A small DC wind turbine feeds a fused buck converter that steps variable turbine voltage down to charge a 12V battery, which then powers a switched cabin LED light.
What is in this drawing
Read the decisions behind it.
01
Use a buck converter with freewheeling diode and output capacitor for regulated 12V battery charging
02
Add input fuse and blocking diode to protect against overcurrent and reverse discharge
03
Connect LED lamp through an SPST switch for cabin lighting control
Reuse for off-grid small wind turbine charge controllers where DC turbine output must be regulated before battery charging and a low-voltage DC load is switched separately.
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