Solar to charge Radio Batteries #Solar

John McDonald
 

How to calculate the size solar panel(s) required to charge radio batteries ?

Application: Portable/backpack radio & battery recharged via solar panel:

12V, 12Ahr Lithium Iron Battery provide power to Yaesu FT817ND or FT857D
Motorola PMNN4077C 7.4V, 2200mAh Battery in Moto XPR6550 hand-held

Charging using the 110vac wall-wort takes several hours, seeking the correct wattage of multiple small or larger roll-up solar panels to adequately recharge the radio batteries.    
 

  

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