Here's a decent small panel that i use:
Note the use of standard MC4 connectors, using heavy gauge wire, not the
24ga that the HF panels use.
This puts out an honest 2.5A and it's very thin, slightly flexible ad less
than 2' square.
I also bouught a cheaper one:
I have not compared them yet, this one seems a tiny bit less, finish wise.
On Wed, Aug 23, 2017 at 6:28 PM, Mike Scott <mike.sc...@rennlist.net> wrote:
> Agree, those panels are very optimistically rated. I have 10 of them wired
> to a small grid-tie inverter, and while I don't know the efficiency of the
> inverter, I would assume that "150 Watts" worth of panels should be
> producing a bit more than 50-60 Watts in full sun...
> On Tue, Jul 25, 2017 at 10:23 AM, Lee Hart via EV <email@example.com>
>> From: paul dove via EV <firstname.lastname@example.org>
>> >What is the wattage on that Lee. I calculate 3Watts. 0.25 X 12 V = 3 W
>> >Harbor freight sells a 15 watt panel.
>> >15 Watt Solar Panel
>> I don't recall what wattage was claimed. But many of these panels will do
>> things like advertise the short-circuit current, and open-circuit voltage,
>> and multiply them together to get the claimed wattage.
>> That's completely bogus. First, it assume perfect full sun, at the
>> optimum angle, and a low ambient temperature. Second, you can't even get
>> half the short-circuit current into a real load. Third, the voltage under
>> load is substantially less than the no-load voltage.
>> The more honest vendors will provide a voltage, current, and wattage
>> under realistic conditions, driving an actual load.
>> Even then, you have to consider how you will actually use the panel. In
>> my case, the PV panel sits horizontally, on the shelf under my car's back
>> window. Thus it is never at the optimum angle, the glass reduces the light
>> intensity, and the temperature inside the car is always hotter than ambient.
>> Excellence does not require perfection. -- Henry James
>> Lee A. Hart http://www.sunrise-ev.com
>> UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
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