Harold Davis wrote:
Coronavirus advice sought. Say the mains electricity goes off for a long
time. What is the best solar rig-up for charging batteries for my radio,
music player, electric toothbrush, and torches? I won't need to charge more
than six AAs or four Ds at a time, but a bit of redundancy wouldn't go
amiss so that I can help out my elderly neighbours. Most important is the
radio.

Some kind of simple setup, say with a single panel producing 12V connected
to a 12V battery charger if they exist would be preferred, but I am open to
all recommendations!

For charging a 12 volt (or maybe 24v or 36v) battery look for an MPPT
charger to run from the solar panel[s]. This maximises the output from
the solar panels by optimising the load it applies and also makes the
conversion down from the (approx.) 30 volts to what's needed to charge
a 12v battery as efficient as possible.

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Chris Green
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