Believe me I always read the directions before beginning a project, to a fault. ?If you don't believe me, ask my wife. ?I downloaded the BP500 manual which I encourage everyone to do if they contemplate a purchase. ?In the manual on Page 9 they make a reference to my question but they don't explain it clearly.
The BP-500 will not charge if an external power source is connected to the TX-500. ? Does this mean it's OK to hook up a power source with the BP500 attached to the TX-500?
If the battery pack is active, it will provide backup power if the transceiver's external
power supply is undervoltage (below battery pack voltage) or if external power is lost.
Solar panel cells can be used as a charging source, providing an output voltage in
the range of 13 to 50 V.
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David Holmgren K9AT "Ruffers"