Forum Discussion
Tom_M1
Jan 15, 2020Explorer
Expanding on MrWizard's DC-to-DC converter idea, you could make your own charger by using a boost converter connected to a cheap solar charge controller.

150 watt boost converter from Amazon

7 amp solar charge controller from Amazon
Set the boost converter output to about 20 volts and the charge controller will prevent overcharging the battery. Connect the battery to be charged first then apply power to the converter.

150 watt boost converter from Amazon

7 amp solar charge controller from Amazon
Set the boost converter output to about 20 volts and the charge controller will prevent overcharging the battery. Connect the battery to be charged first then apply power to the converter.
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