Hi there, @ffiscool. Obtaining a charge from hardwiring is best accomplished through proper power and optimizing battery usage. An 8v to 24v AC power supply and standard gauge wiring should certainly provide sufficient power. Checking connections is always a great step. The next best step will be to ensure your battery use is optimal for ensuring the charge applied by wiring is effective. Check out our Community post about common battery draining variables that you can improve to ensure a charge is received. I hope this helps! 
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