[Elecraft] LED bulbs

[Gerald Manthey]

Dave
I have a question for you.
I too run off of solar when I am in my RV. I have a 900 amp hour battery
bank. Using a 12v pure sine wave inverter. I took the battery bank and
divided it to a 450 amp hour 24 volt system and it seems to last longer.
Have you concidered this or even going to a 48 volt system?
Just curious.
Thanks
Gerald.
 On May 12, 2015 1:44 PM, "Dave Olean" <k1whs at metrocast.net> wrote:

> I am using my KPA500 while running on batteries. Sounds weird but true.
> The KPA500 is quite efficient although it is always drawing some current
> even when turned off. I can see that slight drain on my DC ammeters. In
> receive, there is little current drain. Of course, when I start sending CW
> I see the ammeter go up to about 70 amps. (Not a peak reading ammeter
> either!). My battery bank is a pair of 275 AH solar AGM type 12 volt
> batteries. The charging circuit is a couple of 220 watt solar panels. I use
> a pure sine wave inverter that is pretty noiseless.  (Xantrex Pro Sine 1800
> W) During the day when the Sun is out, the batteries charge up during the
> receive cycle, so I don't deplete the batteries at all. At night I can go
> for many hours and have never gotten close to even a 50% discharge. In
> short, the K3/KPA500 combo is very efficient. I could not do that with my
> big tube amps! The filaments and blowers would kill the batteries before I
> even got the HV turned on!
>
> Dave K1WHS
>
> ----- Original Message ----- From: "Marc Veeneman" <mhvnmn at gmail.com>
> To: "Wayne Burdick" <n6kr at elecraft.com>
> Cc: "Elecraft List" <elecraft at mailman.qth.net>
> Sent: Tuesday, May 12, 2015 3:25 PM
> Subject: Re: [Elecraft] LED bulbs
>
>
>  Not everyone can turn a QRP LED discussion into a KPA500 pitch with power
>> plants as the bridge.
>> --
>> Marc
>>
>>  On May 12, 2015, at 10:33 AM, Wayne Burdick <n6kr at elecraft.com> wrote:
>>>
>>> LED bulbs are optical QRP, so not O.T. :)
>>>
>>>  If everyone swapped in LEDs over the next few years, we'd probably
>>> eliminate the need for any new power plants.
>>>
>>> Even if we all started using KPA500s.
>>>
>>> 73,
>>> Wayne
>>> N6KR
>>>
>>>
>>>  On May 12, 2015, at 6:18 AM, Marc Veeneman <mhvnmn at gmail.com> wrote:
>>>> I don't think I've saved much money, though.  The reduced electrical
>>>> demand won't justify the high cost of the modern day wonder -- LED lighting.
>>>> --
>>>> Marc W8SDG
>>>>
>>>> _
>>>>
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