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Re: [TowerTalk] Solar Power Question

To: "Tower Talk List" <>
Subject: Re: [TowerTalk] Solar Power Question
From: "Jim Brown" <>
Date: Tue, 26 Sep 2006 17:10:35 -0700
List-post: <>
On Tue, 26 Sep 2006 18:42:07 -0400, Doug Rehman wrote:

>running a UPS 

Before you go to the trouble (and cost) of an inverter to get to 
120V, check the power requirements of the DSL modem and the wireless 
gear that you're going to use. A lot of that stuff is 12VDC out of 
the box, and gets it from a 12VDC wall wart. Designing your 
installation should be simple. Stick an DC ammeter on the gear, and 
make sure that the charging current will keep ahead of it through a 
week of the darkest days. 

Hint:  Do some reading up on solar. Panels produce a lot more 
current when the sun hits them at exactly 90 degrees, so the long 
term avg charging current will be a lot less than the peak value. 
There's lots of stuff on the net. 


Jim Brown K9YC


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