so it might be possible to power the pump array direct and also charge
batteries through a hv mppt charge controller at the same time??
todd
On Wednesday, June 5, 2013 8:18pm, jay peltz j...@asis.com said:
Hi Todd
As bob-0 and Larry have said
And the sqflex is a mppt unit,
You want to be careful when paralleling a Charge Controller and a Pump
on a PV array. The Charge controller and pump can do interesting things
to each other. I would suggest if doing this you either use blocking
diodes on the pump and Charge Controller or you use a NO / NC relay and
let the
I'm looking for an idea, project, or pre-made kit to engage a group of 6-10
year old kids for an hour. I've been doing PowerPoint presentations and
games in the past for these types of events, but I'm finding it a bit
stale. Any ideas to create a little more excitement and wonder?
*Jason
I've seen folks use a small magnet attached to a piece of cardboard with a piece of rubber band to demonstrate the stretchy relationship between electrons and the nucleus in atoms. You'd use another stronger magnet under the cardboard to "stretch" the top magnet out of it's orbit creating
We built a complete solar system using MC4 connectors on all the cables. A
small battery, a 30A charge controller, and 2 x 80W panels gave them all
the components in an easy to assemble system. We also made two load items,
a few computer fans mounted on a piece of rail and a DC water pump with MC4
Chris
That is a good tie from HT. I think your part number is off however. The
spec is PA66HIRHSUV. They have them in 50lb and 120lb capacity and in
varying lengths. These have a good life expectancy in arid climates. You
can even get something in writing from HT. We have been able to procure a
Jason,
An hour?! That's the toughest crowd on the planet. But also the most
rewarding. I recently did one of those gigs for a school (we did an install
there last summer) and did an audience participation where a group of
three boys were photons, and three girls were electrons, with the teacher
Hi Allan,
The C-series behaves in the same way as if you were to connect the module
directly to the battery,
then watch a DC volt meter and disconnect/reconnect when the bulk voltage
is reached to hold the battery
at that level. It will hold at the bulk level for 1 hour, then transition
to
Kids love things that move. Get an electric motor powered by a solar panel and make something move.Recently at a science fair there was some difficulty with the distinction between power and voltage, especially Voc and Vmp. But when the solar panel and voltmeter were attached to a model car
Hi Marco. What's the kWh output for the 327 watt module for a whole
day?
Thanks.
Bruce
On 6/5/2013 9:48 PM, Marco Mangelsdorf
wrote:
I thought Id pass on some real world
experience with
Robin's description of the problem matches that given by the Tigo and PowerOne techs when we recently had the same issue. In fact, PowerOne now has a pdf on their website to the effect that you must disable the inverter's MPPT scan when using Tigos with them. But they will not admit to any product
2 more cents worth. If your MPP control is powered by both the battery
and PV source (diode orred) you should be able to pump solar direct.
Several of our customers do this even though we do not specify the
feature. You also get great locked rotor start current. The LCB line we
made for Windy
We did an outdoor fair populated mostly by schoolkids once. We rigged a
small panel with a small computer fan. Every kid had to stick their finger
in the fan. Every single one.
On Thu, Jun 6, 2013 at 12:40 PM, d...@energysolarnow.com wrote:
Kids love things that move. Get an electric motor
Hi Jason,
I have an electric bubble blower that runs off of a 12 volt wall wart. I
connect it to a 75 watt 36 cell module with one of the bypass diodes shorted,
so the output voltage is only 10 volts open circuit. Kids love it because the
bubbles stop coming out when you stand in front of the
We had one of those too, some years ago
for solar fairs. Ours was homemade, with 8 little wands on a
rotating disc that dipped into bubble solution and then rotated in
front of the blower. Except that ours appealed to (most of the)
adults as well as the kids, as
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