. If you have to
replace the roofing material before installing, that roofing material is
not considered "qualified." Conduit in a trench to a ground mount is
qualified. Landscaping work to clean up after the trench is not.
Hilton Dier
Missisquoi River Hydro LLC
Renewable Ene
conditions.
What’s the most obvious thing that could be going on? Some kind of micro crack
and thermal expansion?
Thanks,
Hilton Dier III
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But on that note, it’s cheaper to buy and opportunistically fill a 1,000 gallon
plastic storage tank than to buy the batteries needed to fill that storage tank
on demand. Store the final product if you can.
Hilton Dier III
Renewable Energy Design
Missisquoi River Hydro LLC
there might be a
shortage of both batteries and attention.
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ick looking rig. Good luck.
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for an alternative? I know it’s unfashionable, but I’m not
a fan of micro inverters.
Thanks,
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nuclear weapon.
Best of luck,
H
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Forgot to add: I’m talking about the belt drive piston pumps out there so you
can install a low voltage DC motor if you want.
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, which is not out of line for a piston pump. Fill
a big poly tank and pressurize it with a small DC diaphragm pump if necessary.
Simple, efficient, cheap.
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You have 300’ of head on one side of the crest and 700’ on the other. That’s
129 psi on one side and 301 psi on the other. Turn either of those pressures
into suction and water would boil at room temperatures. Aside from pipe
strength, any siphon would be limited by that.
Hilton Dier III
I didn’t really register the distance on the first look. These days, 3,600 feet
of 3” PVC conduit is going to knock you back ~$18,000 to start, plus trenching
and cable on top of that. I agree with prior comments that it would be cheaper
to put in a new system.
Hilton Dier III
Renewable
scattered around would make any difference.”
Good luck.
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Missisquoi River Hydro LLC
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failing. Let’s mandate that.”
Hilton
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the VFX 3232, but it would modernize the system.
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that comes from grim
experience.
The “can you cob this back together for $200?” job is a non starter.
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and ice dams.
Why can’t there be a module with the equivalent of Teck 90 cable on it?
Maybe I’m just being naive.
Hilton
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I'm with Jerry Shafer on this one. S-5 clamps with rails work well
without punching holes in the metal roof. If the roof is fastened well
to beefy steel C channel it should be fine. The S-5 clamps themselves
are stronger than the roofing.
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Missisquoi River Hydro
Renewable
.
Cobra “x-flex” cable is MTW THW fine strand, NEC compliant, and easy to bend in
small spaces.
Hilton
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time on these?
Many Thanks,
Hilton
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and the 12 is
really 15 or a bit more. I have seen 15 amp plugs and outlets with the
hot prong melting plastic around it. The plug on the OEM EVSE is 20A
rated but make sure your outlet is as well.
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Renewable Ene
of safety, rails spread out the load over multiple mounting
points, so no one point takes an extreme load and the failure of any one point
isn’t immediately fatal.
Rails, yes.
Hilton Dier III
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Missisquoi River Hydro LLC
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and mechanical
solutions on this list, but whatever you do, don’t waste your money trying to
heat an open surface water tank.
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I have a client with an array of Schott ASE DG-50 modules. I think they are the
derated 200 watt units. A couple of them are showing some thermal cracking. If
anyone knows a source for these please contact me off list. Many thanks.
Hilton Dier III
Renewable Energy Design
Missisquoi River Hydro
bolts to put it all together. I've never had the
opportunity to use it in a battery box but it seems like the right stuff.
A number of industrial supply companies sell walkway decking in this
kind of material.
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be cautious
about doing a job for someone penny pinching on an inverter.
Not exactly the advice you were asking for, but it jumped out at me.
Hilton
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.
Their tech might have been bought by this company
(https://www.qnergy.com/) but I'm not sure.
Hilton
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to do O
Unsolicited opinion: solar Stirling is a non-starter in a world of cheap PV.
Stirling does have a place in small scale cogeneration.
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important client is the one you don’t take.
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, but they are
really durable and stand up to over charge and full discharge. I’ve used them
in EVs and you can boil the snot out of them. Like an EQ every time.
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ones.
I’m thinking they may have to rely on the mercy and understanding of the
Canadian coast guard equivalent of an AHJ. If there are no listed monitors
there should be an exemption. Ignorance of SOC is worse for safety than a
non-listed battery monitor. But that would be logical, so...
Hilton
.
Any suggestions appreciated.
Thanks!
Hilton
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motor in question doesn’t start under load, you might
consider a DC pony motor to bring it up to synchro RPM before closing the main
contactors.
Good luck!
Hilton Dier III
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Missisquoi River Hydro LLC
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Would #8 meet code? I thought that exposed ground wire had to be #6 minimum.
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If it were me, I'd buy a case of Red Head A7 anchoring adhesive:
https://www.fastenal.com/products/details/0228790
Get an engineer to do the static load calculations and design the
attachment disk and bolt pattern. Weld a big disk with holes around the
edge and gussets to the bottom of your
.
Also, I know mentioning this is out of line per list etiquette, but could
people refrain from including 20 preceding messages in their posts? I tend to
read this on my phone and my scrolling finger is getting shorter. Thanks!
Hilton
Hilton Dier III
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.
Best of luck,
Hilton
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weather performance.
4) Module width is never an even multiple of roofing pan width. No rails means
inevitably some modules will be “diving boards.”
5) Without rails, getting the modules to an even height is a giant PITA. Takes
forever. I did it once and never again.
Best
Hilton
Hilton Dier III
" sonotube instead of a
32" one is minimal. Peace of mind is priceless.
Hilton
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standards and good sense design,
then that is your signal to politely bail out. Otherwise it's just going to be
an ongoing failure for which you'll take the blame.
Good luck
Hilton
Hilton Dier III
Renewable Energy Design
Solar Gain, LLC
Missisquoi River Hydro LLC
different electricians there to check the house wiring and it's
all solid.
Any ideas? Some kind of metal roof capacitance?
Many thanks,
Hilton
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I would recommend using Teck 90 cable for direct burial. It is armored and
coated and rated for just about anything. You can get it in a variety of wire
gauges and numbers of conductors. It makes trench installations fast and easy.
Hilton Dier III
Renewable Energy Design
Solar Gain, LLC
tabs.
I usually use SMA inverters, which have fixed nuts on the mounting frame and
matching tabs on the inverter for stainless socket head screws.
Has anyone dealt with this? I can't imagine just leaving the inverter hanging
there.
Many thanks,
Hilton
Hilton Dier III
Renewable Energy Design
Solar
what will?
Obvious video cameras (real or fake) and a sign saying "You are being
videotaped" is the best aside from that.
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it out
and drop it in the trench. You'll be done before the backhoe operator finishes
his cigarette.
The cost per foot isn't that much over wire and conduit and the time and hassle
savings are huge. As you can tell, I'm a convert.
Hilton
Hilton Dier III
Renewable Energy Design
Solar Gain, LLC
small battery
banks. If necessary you could combine two of them with conduit for a larger
bank. They are acid proof and neat looking.
They are a bit pricey, but consider the hassle and cost of getting together
materials, assembly, lining, painting, etc.
Hilton Dier III
Renewable Energy Design
had done, and opened the battery box. Y'know those old
wood-block prints of angry samurai warriors with squinted/bulging eyes?
I must have looked kind of like that.
I'll say it again: The most important client is the one you turn away.
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line shading? I know that we can check the
solstice sun angles against the wire height and top and bottom heights
of the array. But if the array ends up inside that angle range, how far
away does it have to be for that shadow to interfere into a non-issue?
Thanks,
Hilton
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US Plastic (usplastic.com) carries polyethylene tanks used in industry
for acids. You can get them in various sizes - 24 x 36 x 20 deep and
larger. They will custom heat weld whatever you want. Kind of pricey
(~$300) but heavy duty.
Hilton
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into the low forties.
What we really need now is not more efficient modules but cheaper mounting
hardware. Ground mounting is getting as expensive as modules.
Hilton Dier III
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to bring the rpms up to rated motor
speed, then connect, then push the rpms higher to push current. Hydro controls
would work without much modification. You need it to disconnect under a variety
of fault conditions - that's sensors and software.
Hilton Dier III
Renewable Energy Design
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Apollo units,
stacked Magnums, and stacked Outbacks. I know from experience that the
Outbacks require some hundreds of dollars of extra fittings and
electronics to make a proper stacked installation. How about Magnum? Any
comments on reliability?
Many Thanks,
Hilton
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the end of the armor
cleanly and as directed and then disassemble the connector and put it on
piece by piece. Takes a couple of minutes.
Hilton
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minutes. No conduit
bending. The end connectors are kind of pricey, but the time saved is huge.
Hilton
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in
a rainy summer you'll never get a call.
Hilton
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.
At the very least it will put them on notice that the reality of the
situation is not ideal.
Good luck.
Hilton
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discrete components they could source.
Talk them down off the ledge.
Hilton
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-wired
inverter/charger I can find. Preferably sine wave. Not one of those auto
parts store models.
Any ideas?
Thanks,
Hilton
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, and then get
starved again. Perfect storm.
Tell her that she needs a new set of matched batteries. If she balks,
politely tell her you can't help her, and let someone with less
judgement deal with it.
Good luck,
Hilton
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453
to smoke anything.
Good luck.
Hilton
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that turns 24/48 VDC into some kind of 3-phase power. It also has a
pressure switch input and a low water input.
Thanks.
Hilton
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?
And the big question: How do we deal with this? I can imagine the fossil
fuel and nuclear industries promoting this story with enthusiasm.
Thanks,
Hilton
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% in the first three years. No mention of absolute failures.
Allan Sindelair's and Jim Duncan's points about vertically integrated
companies are good. Better chance of survival and better control over
inputs.
Hilton
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I believe my PV-water-heating friend has an Outback in diversion mode,
so the charge profile is stepped, as Conrad noted. He has a 4 kW PV
system and a frugal household, so in the summer it takes care of about a
third of his DHW needs.
Hilton
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or during a windy spell) the element comes on. That way, instead of
just a PWM shutoff and wasted energy, he gets some benefit.
I wouldn't deliberately install PV just for hot water, but in an off
grid situation where the excess would go to waste, it makes sense.
Hilton
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and remarkably strong. They look tidy and are easy to drill into for
conduit fittings, hinges, latches, etc. I've used them a few times for
small 4 x 12V battery banks, but you could link two of them for 8 x 6V.
Hilton
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as opposed to a
copper box. (Actually, widely spaced battery cables can be a source of
RFI, so I wasn't totally spoofing her.)
Good luck,
Hilton
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, wrenches!
Hilton
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mitigation for PV as an application, as well as ramp mitigation for wind.
http://www.beaconpower.com/solutions/other-flywheel-applications.asp
Hilton
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A friend of mine has an old Xantrex SW 4024 installed in a
less-than-accessible location. He's looking for one of their remote
control and monitoring panels. If you have one of these kicking around,
or know of one, please contact me off line.
Many thanks,
Hilton
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The only time I ever dealt with this it was bad grounding in the house
wiring. Same deal, AM radio interference. I can't remember whether it
was a soft ground or a ground loop, but that's where I'd look.
Hilton
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me before you do stuff? Let's go through this again...
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both under
one module, then shift them over when the first module is clamped from
one side. You could cut them out of 3/4 ply for a particular job. I
like these because they are adjustable.
Hope this helps reduce rooftop profanity for someone.
Hilton
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one module at a time as
long as the rail is s
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the process.
Hilton
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region installers about the merits of the -40C option?
Thanks,
Hilton Dier
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end fittings?
Hilton
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thanks.
Hilton
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that once for sheer amusement I stripped a few inches on the
leads of a roughly 100V string, put on my sunglasses and struck an arc. It
jumped a good inch and ate up half an inch of #8.
Hilton
Hilton Dier III
Renewable Energy Design
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Missisquoi River Hydro LLC
packs.
Given the efficiencies of modern high voltage utility tied inverters,
your client isn't really losing a lot. He'd probably lose as much
through a DC charge controller.
Hilton
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120VAC outputs and the stacked Outbacks
are putting out 240VAC on two legs.
Aside from dropping $600 on an e-Gauge, is there any way to get around this?
Many thanks,
Hilton
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of safety is not all that huge.
The cost, as a percentage, is not that huge either. And you'll sleep better.
Hilton
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as the cable is rated
for the conditions.
Hilton Dier
On 5/17/2012 1:37 PM, re-wrenches-requ...@lists.re-wrenches.org wrote:
Wrenches,
I am doing a job for a customer installing a ground mounted array about 250'
from his existing battery bank. Array is:
- Vmp: 87.9 V
- Imp
of
electricity.
Hilton
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is that the hinges are broken and the
partitions have deteriorated to uselessness. I need a new case. This one
wasn't ideal, so I'm looking for suggestions.
Thanks,
Hilton
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a second (or so) after it gets actuator power
before energizing. In that case you'd want to adjust the pressure switch
to come on a few PSI higher than usual so the customer doesn't
experience a momentary loss in pressure.
Best,
Hilton
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?
Many thanks,
Hilton
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high-current Solarex module.
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in the trenches making it all happen.
Larry
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://www.apparent.com/downloads/TheMathematicsOfDynamicPowerManagementOnTheGrid.pdf
Remember that with utilities it's always a fight until they realize the
benefits.
Best,
Hilton Dier
Ray,
The idea that the utility in an island is seeing an advantage to
having PV on the grid is a huge concept for me
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