If I remember correctly, the AF5x is only supposed to use around 15 watts.
I haven't checked what a Mimosa actually uses, but I think they're rated a
bit higher... something like 20 or 25 watts.
On Tue, Mar 10, 2015 at 6:52 PM, Bill Prince <part15...@gmail.com> wrote:
> I would recommend (lacking any other information) that if you're going to
> be running those things in a solar application that you want the highest
> voltage you can. Probably a 48 volt system. For an AirFiber, that is
> still going to be a constant 1 amp load. That's 1.2 KWH per day.
>
> At 49 north, you won't have many hours to recover, even on a sunny day. I
> would try to get a week's worth (Chuck would say 10 days worth) in the 2
> hours of sunlight you "might" get on the winter solstice.
>
> Sooooo. That would be 1200 WH * 10 = 12,000 WH (aka 12 KWH). You need to
> be able to generate 6KW per hour.
>
> On my little scratch pad, that is going to be about 25 300 watt panels
> (best to figure about 80% efficiency on your solar panels).
>
> I shudder to think how much battery that is, and that is only one radio.
>
>
> bp
> <part15sbs{at}gmail{dot}com>
>
>
> On 3/10/2015 4:41 PM, Bill Prince wrote:
>
> Watts is watts.
>
> If you're drawing (for example) 50 watts.
>
> 110 VAC at ~~ .45 amps is 50 watts
> 48 VDC at ~~ 1 amp is 50 watts
> 24VDC at ~~ 2 amps is 50 watts
>
> Looking at power consumption in watts eliminates having to figure out what
> the voltage is.
>
> It does not deal with conversions though. The aforementioned 110VAC will
> surely involve some conversion efficiencies (or lack thereof).
>
> Not having any specific information, I figure at least 10% loss each time
> you convert. So if you're powering an AF24 on 110VAC, you can rule of
> thumb estimate that the real amperage (on the 110 VAC is going to be closer
> to .5 amps (instead of .45 mentioned above).
>
> bp
> <part15sbs{at}gmail{dot}com>
>
>
> On 3/10/2015 4:23 PM, e...@kuhnke-international.com wrote:
>
> Looking at the mimosa b5c, AF5X and other new low cost 256QAM radios for
> an off grid solar application.
>
> Will be used with the tycon dc-dc poet injectors.
>
> Manufacturers, do you gave any real world figures for constant W load?
> Are the figures for wattage in your datasheets as measured on the AC or DC
> side of the POE injectors included with your radios?
>
> At latitudes above 49 north, we need to calculate very precise kilowatt
> hour per month figures to survive reliably through December and January.
>
>
>
>
