[aprssig] Solar Powered Digi's.
scott at opentrac.org
Tue Dec 4 14:35:30 EST 2007
I know I did see some guidelines somewhere. I think you're supposed to
size the battery for operation with 3 days of no sun, or some such. Not
sure on the panel size, but it sounds like you've got a good start there.
John Ronan wrote:
> On 4 Dec 2007, at 18:53, Phillip B. Pacier wrote:
>> I had a solar powered digi up for five years (W7RBV-2). I have since
>> transferred ownership of the digi and it is no longer solar powered,
>> but what what information are you looking for?
> Typical "Rules of thumb" I guess for battery/panel sizing.
> I was thinking of a OT2 and maybe a FT-1500 or some other dedicated 2m
> Radio. The OT2 will also broadcast battery voltage as telemetry for me.
> Its not something we've done before.. so avoiding any 'gotchas' would help.
> Apparently, the 'average' Sun hours per day over here is about 3.75. So
> I was going to go for a rough figure of TX'ing 20% of the time, and try
> and size the battery so that it never gets discharged below 80% on that
> figure. And then I guess, size the panel so that it could recharge the
> battery from roughly 80% discharge on a 3.5 hour day of sun. Does that
> sound reasonable?
>> Phil - AD6NH
>> John Ronan wrote:
>>> I'm looking for 'rules of thumb' for solar powered digi's. We've
>>> been offered a site for a digi, but power on it could be an issue.
>>> Any experience appreciated.
>>> de John
>>> John Ronan <jronan at tssg.org>, +353-51-302938
>>> Telecommunications Software & Systems Group, http://www.tssg.org
>>> aprssig mailing list
>>> aprssig at lists.tapr.org
>> aprssig mailing list
>> aprssig at lists.tapr.org
> John Ronan <jronan at tssg.org>, +353-51-302938
> Telecommunications Software & Systems Group, http://www.tssg.org
> aprssig mailing list
> aprssig at lists.tapr.org
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