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From: "Jim Wilkins" <muratlanne@gmail.com>
Newsgroups: rec.crafts.metalworking
Subject: Re: Successful Transplant !
Date: Mon, 28 Oct 2024 18:47:33 -0400
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"Snag"  wrote in message news:vfp1nb$16iar$1@dont-email.me...

On 10/28/2024 4:27 PM, Jim Wilkins wrote:
> I post this stuff because I've been searching discussion groups for 
> information and finding mainly scattered snippets directed at the 
> questioner that don't help explain the big picture I'm looking for.

   I shoulda realized ...
-- 
Snag
-----------------------------
For example the Jackery 290 claims to have an MPPT controller but monitoring 
the charging current and voltage doesn't show signs of one, it looks more 
like a current-limited step-down converter that doesn't hunt for the maximum 
power point. I don't want to experiment with it until I have a good idea of 
what it can or can't accept for input. Their phone support site naturally 
isn't staffed with engineers and I haven't found evidence of user 
experimentation beyond measuring run times. One snippet was a mention in the 
FAQ of 200W solar panels being acceptable, without explanation of what it 
would do with their excess power. Apparently it limits itself to pulling 
60W.

I'm measuring my 12VDC freezer's run time on it. So far it's headed for 15 
hours, more than enough to sleep through.