Erika,
Check out:
http://www.enphaseenergy.com/downloads/EnphaseAppNote_RackingCompatibility.pdf
from Enphase's website.
Bill
Feather River Solar Electric
4291 Nekson St.
Taylorsville, CA 95983
- Original Message -
From: Erika M. Weliczko
To: 'RE-wrenches'
Luke,
Direct Power and Water has an optional mounting foot with five holes in
it for what I think Jeff Randall there referred to as 'Tech' screws to use in
the field between rafters. They are referred to as 'easy feet'. It is designed
to only attach into the roof decking, which I'm
Positive Energy, Inc.
3201 Calle Marie
Santa Fe, New Mexico 87507
505 424-1112
www.positiveenergysolar.com
frenergy wrote:
Luke,
Direct Power and Water has an optional mounting foot with five
holes in it for what I think Jeff Randall there referred to as 'Tech' screws
Nik,
Is your concern the dielectric action between the copper roofing and a
conventional galvanized roof jack?
Bill
Feather River Solar Electric
4291 Nelson St.
Taylorsville, CA 95983
- Original Message -
From: Nik Ponzio
To: RE-wrenches
Sent: Monday, February 01,
...and there it went again. gotta love it
Bill
Feather River Solar Electric
- Original Message -
From: robert ellison
To: RE-wrenches
Sent: Monday, April 12, 2010 7:12 AM
Subject: Re: [RE-wrenches] Entertec service manual
OOPS this was not intended to go to the
I hate to up you guys on this but you know the emails we get from our friends
over there in PV, China?? They had 159,354 solar powered calculators that the
+ button didn't work. OOOHH, what a deal we got on those little amorphous
cells for the system we're installing at the local Building
Alan,
Thanks for sharing all that, pretty similiar to my take on offgrid batt
pack install. Though I really like the idea of sloping the top to keep folks
from putting stuff on it and thus avoiding that maintenance we all love to do.
I know I've been caught a couple times with my
Bob,
Do everyone a favor and dump the modules. They can be used in
classroom demos, power a greenhouse fan, an inspirational birthday present for
the nephew/niece . esp because you want to re-rack! Although you haven't
told us if they are ground or roof or pole mount. Geez,
Don,
AEE has been good to me over the years. They have several flavors of
PVs, though I believe no Kyo.
Bill
Feather River Solar Electric
- Original Message -
From: i2p
To: List for complaining about anything RE.
Cc: re-wrenches@lists.re-wrenches.org
Sent:
Joel,
For me, I'd say rather than necessarily power, it would be power
densitythough it's certainly more convenient to install 10, 205's, vs 17,
120's. Yes, we're all somewhat chained to price, cuz if we're not, the guy
down the road will likely get the job. On the other hand,
Chris,
I've seen a bladder tank modulate the shut-down process in a
up-the-hill gravity feed tank when using a (IMO) more reliable float valve
rather than a float switch. Watts model number 1250 is an example of a toilet
tank method of stopping/starting flow to a tank. With the
clean well water
straight into the septic. Our customer's electric bill was in the hundreds of
dollars.
I wouldn't quite say they're bomb proof.
R. Walters
r...@solarray.com
Solar Engineer
On Jun 16, 2010, at 10:32 PM, frenergy wrote:
Chris,
I've seen
I have also had a great experience using Easy Feet from Direct Power. You
use four of their screws per foot and Jeff Randall there can give you pull out
specs in roof decking, as I recall they match or exceed that of the Lag/rafter
combo.
Bill
Feather River Solar Electric
4291 Nelson St.
Wrenches,
I am looking for an Evergreen EC-120-GL to replace the one dinged by
the rock flung by my client weeding aroung the ground mounted array with a
lawn mower. It may take me a couple days to respond as I'm on the road.
Thanks in advance for any responses off-list.
Bill
Feather
I think you're right-on Michael,
Bill
Feather River Solar
- Original Message -
From: Michael Welch michael.we...@re-wrenches.org
To: RE-wrenches re-wrenches@lists.re-wrenches.org
Sent: Monday, August 16, 2010 12:41 PM
Subject: Re: [RE-wrenches] The Genie Lens
Hi gang. If you
Wrenches,
I installed a grid tied system 6 years ago consisting of 24, Shell 110
watt, 12V PVs ( Vmp = 17.5V, 6.9 amps short circuit), running through an
SMA2500U inverter, one string, very short DC run ala 10 ga. USE-2 wire.
At installation I documented a solar noon output
Ray,
Sorry I don't have a picture to share but the Ilsco GBL-4DBT lugs
I've used here in the Sierras of NE Ca. are looking good after seven years
on the job. I would rate their appearance as if they were outside in the
weather/sun/rain/snow for about 2-3 months, slight discoloration,
Hey Benn,
I've been communicating with Paul Hernday the at Solmetric concerning
the PVA-600 and also an issue I'm dealing with concerning a 6 year old array's
output. My impression was that he was the lead person in making this tool
happen. They are fine-tuning some of the software
Mark,
It's probably just a brain fart, but it's lead-calcium
Bill
Feather River Solar Electric
4291 Nelson St.
Taylorsville, CA 95983
530-284-7849/6544 fax
- Original Message -
From: Mark Frye
To: 'RE-wrenches'
Sent: Monday, October 04, 2010 8:11 AM
Subject:
Hey Carl,
Li ion batteries are awesome and will be used extensively in the first
generation of electric cars (supposedly) coming to a showroom near you.
However, a pack like the one you've described will only be affordable to those
with the ability to buy a super yacht, not 98 % of
Hey all,
Marco said: Makes you appreciate even more those other inverter
manufacturers who get their warranty replacements out the door in days..
Last month I had a GFI circuit fail in SMA 2500U. SMA had a replacement
inverter to me the next day. Big points in my book.
Sorry can't help
Lee,
I don't get many complaints from customers about birds. However, I
have personally had to do something about one of my arrays and have found the
owl, with the rotating head, to be very effective in keeping them from landing
along the top of the array.
This particular
John,
Besides needing to know a better description of the corr roofing
profile, what is that roofing mounted on? plywood decking, solid wood,
spaced solid wood (skip sheating),...?
Bill
Feather River Solar Electric
4291 Nelson St.
Taylorsville, CA 95983
530-284-7849/6544
- Original Message -
From: Darryl Thayer
To: RE-wrenches
Sent: Friday, December 10, 2010 8:00 AM
Subject: Re: [RE-wrenches] To insulate a battery bank
I have always been concerned with both high and low temperature. On
case of a battery bank failure it was
Dan,
I recently installed a 4.6 KW system with TIGO maximizers
http://www.tigoenergy.com/index.html at each PV, wired in with MC4's. A
Gateway (mounted centrally amidst the PVs) communicates wirelessly with each
maximizer, then relays (via cat5) status, info to the Maximizer
Joel,
Unrelated, mostly. I got a call from a customer a few weeks ago
that was claiming his inverter had failed working. When I arrived it was in
fact not working and gave a code that the grid voltage was too high. I
called Fronius and they said they sometimes have had to replace a
I don't know about Solaredge, but Tigo has optional irradiance monitoring to
compliment the module level performance monitoring that comes with their
package (Maximizer at each PV, Gateway wirelessly collects info from
maximizers and sends it to the Management Unit. Info is then sent via
Your also going to have to consider what's going to happen to your high temp
voltages in 5-10-15 years as the PVs derate with age plus add in dirt/dust
etc. You'll be losing more and more of those summer hours as time goes on.
Seems like an extremely narrow voltage window on the inverter
For all of the rest of us Bozos that still manually water cells, try using
a set-up used by those who have made their own beer. It's called a bottle
filler in beer making, this is connected to a racking cane via 4-6 feet of
3/8 clear tubing. I hang a one gallon jug of distilled water 2-3
Maybe one way to express it would be hydrocaps are great if you use the the
same charging parameters no matter what the age, condition of the battery is.
This seems to be critical to sizing the HCs properly. And you (or the always
attentive and willing customer) don't (doesn't) mind removing
We still have ours (of about 15 years) and other than the clock lighting, it's
working like a champ. It does get used less these days since we installed a
ceramic (electric) cooktop also (we're offgrid) and have found creative ways to
use the electric more and more.
Thanks for the
I've installed 20-30 pole mounts with the PVC conduit running from underground,
through the 3' sonotube into the concrete. It then sweeps up to meet the
pole/pipe, exits the concrete right next to it and continues to the DC disco.
Never had an issue with the AHJ.
It doesn't really
I've been using Direct Power and Water racks for ground mounting for some 14
years. Jeff offers a lot of support for custom needs/situations, easy to
assemble, can be adjustable (or fixed for a lower price). Never had any
issues, except very infrequently they'll forget to send some fasteners.
Wrenches,
I have a customer that may be having some issues with the reliability
of his 11 year old Trace4024. If my current fix doesn't solve the problem, I
have suggested having the unit fixed, which I think still happens on these
puppies. I have also suggested replacing it with
Wrenches,
I had not thought of using AC1 for the gennyI had some thinking in
the back of my mind that AC1 had to meet tighter input requirements to be
practical for a generator and was thus delegated to grid use, which is not used
here.. I'll keep that one in my toolbox. Customer
Uh oh, I can see it now.a bunch of working guys that already have
truckloads of tools, but are always hoping for an excuse to buy another one.
You KNOW you need it, yeah that IR camera because not only is it going to find
rafters, but you can also find bad wire landings, circuit breakers,
William,
I would have to concur with Randy's chart pretty much. A couple
months a go we bought a 2012 Toyota RAV4 EV. I had just recently completed
an upgrade system here (4.5KW PV, Classic, 84 KW of Rolls batts and a
Radian). We are off-grid.
The research I did before
benn and interested others,
Just a side note due to benn's comment about cold water on a hot panel
possibly resulting in cracked glass.
My 45 degree tilt, roof mounted shop array (5KW, Solarworlds) gets
covered with snow in the winter at times...when I need the power the most
Wrenches,
I have been asked to repair a Grundfos SQ installation for our area
Land Trust. Pump is not pumping and the controller (CU200) is throwing a code
of: F3. The manual says loose wires, bad connection, failed CU200 or failed
pump. I'm looking for more experience than mine in
Alan,
I have always defaulted to that advice also. Just last week, after I
had told a customer a 30% ITC is still available and told him to confirm that
with his tax advisor to be sure he could take full advantage of it (some folks
have to take the 30% over a couple years), he came
Here's a third for 2V Surrette's... However you should discuss details
with this list or someone at Surrette regarding your application. For an
example, Solar Power source? C/rate? Are you replacing a set of golf cart
batts or batteries with similar charging needs as these large cells?
Wrenches,
We installed 12 Evergreen EC-110's on a 16PV top-of-pole rack 9
years ago for a customer. They just bought a Nissan Leaf and wants to
charge it with his off-grid system! (I warned them). The 2 Outbacks and HUP
pack should be able to keep up somewhat but I'm looking for 4
I asked a dealer friend of mine in Southern British Columbia of his experience
with Sundanzer and got this response:
I have sold only 7 of the 8cuFt. SunDanzers and know of two other owned by an
electrician. No complaints from anyone and I have no experience with
manufacturer support other
William,
We've had a 2012 RAV4EV for the last 8 months. On average we are
consuming 13.5 KWhrs/day driving it. This translates to about 46 mi/day,
average. For what it's worth the RAV is Tesla inside (battery, motor,
controller...) though is the 'small' 42 KW battery. Tesla was
Off-grid Wrenches,
I'm working on a load sheet and am having a hard time finding standby
and while firing electrical usage for a propane-fired on demand water heater.
Do they some/all have standing pilots, glow bars, something else? I'm guessing
the standby power needs are very low
If my calculations are correct, with a gallon of gasoline containing around 40
kW/Hours of energy,
that would give Bill's RAV4EV an equivalent of 136 MPG and David's Leaf an
MPG of 112 MPG
boB
boB,
Your numbers look good. David should be doing better than I, however he is
afflicted
Dan,
I am with you on that onestandby power consumption makes me think
of battery sulphation. The 30 watts Ray mentioned for the Rennai would be a
deal breaker for me.
Hopefully I'll hear from a few others regarding standby
losses...doesn't seem very important what
Yes, the 14 gauge I found was USE-2.
Bill
- Original Message -
From: Allan Sindelar
To: RE-wrenches
Sent: Wednesday, October 09, 2013 10:48 PM
Subject: [RE-wrenches] Oddball wire request
Wrenches,
I do a fair amount of work on ancient systems, just because there's been
William, Billfrom another Bill,
Two things: For the rest of us (maybe it's just me?!) that's still
trying to figure out how (or why) to stuff a MC4 connector into conduit and my
hesitation in using SS wire ties for fear of the sharp edges cutting or
chaffing into cables, I'm open
and no maintenance required. One thing for sure, I would check the
programming of the Trimetric. You can undercharge a battery and never know it
if the configuration is not done properly. Make sure to calculate and use P1,
P2 and P14 to determine SoC.
Larry
On Dec 19, 2013, at 9:23 PM, frenergy frene
Another $.02
I have 2, FX3524's and 35 KWhrs of HUP's behind themjust cleaned
and torqued the terminals/cables. I run 6-7 brands, sizes, styles of LEDS and
some of them of them flicker while, in my case, the convection oven is running.
It quickly pulses (~10-20
As a side note, if you use the 2YS31 Surrettes, as I did for a single 48V
string about a year ago. You may want to have them shipped from Canada as a
batch. I'm almost certain that my pack of 24 2v cells was a mixture of
manufacture dates, 3 of which were in the distribution chain for too
Dan,
If your client is stuck on the idea of a stick welder, the 120 volt
models are pretty cheesy...240V is the way to go. However, I've welded many
miles of steel with a Miller 120 volt wire feed machine that does 3/16
material easy and 1/4 if the joint design is set up right. Yes,
John,
It's hard to imagine how the bolt could work it's way out with all that
weight on it but obviously it did. I have ~40-50 DPW TPMs in the field (since
late '90s) and have not had a failure of any kind other than snow and that was
pretty easily repairable.
I just finished
I am a very small solar bozo in the woods of NE CA, but I have a $.02 burning a
hole in my pocket. Jim's comment struck a nerve:
I don’t know how to bring that about but you can imagine how installed costs
would benefit if inverter prices dropped 50% and PV prices rose 10%.
I don't know, the
Hey Chris,
Sorry I can't help. I'm sure you've already researched this and I
certainly see where you're coming from concerning the snow's effect on PV
frames but is too much strength lost being frameless? Their data sheet says
the static load is 50 psf, pretty low for snow country,
Well, just to be fair, many Chinese Co.s are propped up by the Chinese
gov't...favorable tax structures, free land, zero interest loans. Solarworld
seems to be somewhat of a target for failing US manufacturers, however let's
not forget the others here that have failed or may soon thanks to
Bill,
Interesting because at InterSolar in SF this June, they were still
bragging about being made in the USA. I guess you'd want to right up until:
Another one bites the dust (there's a song isn't there?) It's getting
terribly lonely out there for a US made offgrid inverter.
Bill
Hey Folks,
I was authorized by Alan at Magnum to share this with the list.
Hello Bill,
Recently you wrote:How sad you'll have to be taking down the made in USA
flag waving (good-bye) on your website.
This is simply untrue. What is true is that Magnum is now a wholly owned
Wrenches,
I just replaced a failed XW. is the XW BTS compatible with an FM60?
Thanks in advance,
Bill
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/Schneider is 100K
Magnum has a couple of swapped lines compared to the other BTS' but ~may~
or may not
work for others in some instances.
boB
On 9/12/2014 2:48 PM, Jerry Shafer wrote:
No it will not work right
On Sep 12, 2014 2:56 AM, frenergy frene...@psln.com
CA wrenches,
I'm trying to (for the sake of my monetarily impaired customers) figure
out a less expensive way to meter/monitor small enphase systems. One of my
local utilities will allow me to just use a remanufactured utility-grade meter
(ala AEE) These meters are inexpensive, robust
-wrenches.org] On
Behalf Of frenergy
Sent: Sunday, September 28, 2014 2:26 PM
To: RE-wrenches
Subject: [RE-wrenches] Metering
CA wrenches,
I'm trying to (for the sake of my monetarily impaired customers)
figure out a less expensive way to meter/monitor small
William,
Just about a week ago I asked Greg Smith at SMA to confirm that it
would be appropriate to use THWN-2 in the buried PVC conduit for the DC run
from a pole mount array with it's DC disco to the SMA DC disco below their
inverter..Just to be sure you're not thinking you have
Mark,
The only thing I would add to all your good points is the addition of a
7700 watt TL which is of course perfect to stay under the 20% for load side
connection of a 200A service.
Bill
- Original Message -
From: Mark Byington
To:
Kris,
I've installed about a dozen TLs and no complaints from PGE and the
other small Electric Coop here in CA yet. Some installs have had Smart
meters, some not.
Bill
- Original Message -
From: Kristopher Schmid
To: RE-wrenches
Sent: Friday, October 17, 2014 6:51
Wrenches,
I can't seem to find a reference to the heights allowable for inverter
installs, either minimum or maximum (need both). For that matter, AC
combiners, DC discos, any switchgear related to the inverter(s).
Any help appreciated.
Bill
Feather River Solar Electric
solar
Professional™
From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On
Behalf Of frenergy
Sent: Tuesday, October 21, 2014 11:02 PM
To: RE-wrenches
Subject: [RE-wrenches] Mounting height
Wrenches,
I can't seem to find a reference to the heights
Wrenches,
...its the little things. Recently someone here brought up the issue
of combining AC outputs prior to backfeeding the solar CB in the mains panel.
In the past I've run AC outs from inverters into a small AC dist panel,
backfeeding CBs and then ran my combined AC out from a
.a heck of a lot easier to water the darn thing.
- Original Message -
From: Steve Higgins st...@surrette.com
To: RE-wrenches re-wrenches@lists.re-wrenches.org
Sent: Friday, October 31, 2014 2:07 PM
Subject: Re: [RE-wrenches] Passive Battery Venting
Hey Wrenches.
Looks
Fellow wrenches,
During a pitched composition roof install, I'm very conscientious about
avoiding any foot placement/movement/twisting that may damage the shingles. I
try to stay in the array footprint as it will see much less wear after the
install. Chicken boards on steeper roofs
Hugh,
We've done a similar scenario around here the last several years, even
charging an electric car. However, there is certainly more to the story than
an added inverter, eh? I've also added PVs (lots for the car) from the days of
heavy propane use. And I know that some of the
Wouldn't an ammo box work well?...assuming its an AGM battery, though you
could vent the box a little.
Bill
Feather River Solar Electric
4291 Nelson St.
Taylorsville, CA 95983
530.284.7849 / 6544 fax
- Original Message -
From: Tom Lane t...@ecs-solar.com
To:
Dearest Wrenches,
Due to roof obstructions, valleys, snow, etc, I recently ran the top
row of an array a couple inches beyond the ridge of a roof. Of course one
can see the top of this row of PVs from the north side of the roof. The
customer was apprised of this happening ahead of
Marco,
Chinese and Taiwanese continue to get hammered with these tariffs.
In any game, if you're not playing fair, you get penalized.
Yes, I too thank SolarWorld for producing a very high quality product
here in the USA at a reasonable cost, less polluting production
Wrenches,
Occasionally I get wrangled into doing hot water. I used to source
stuff from Solar
Depot, but they are gone. For those wrenches in the NE California area, I
would appreciate leads on suppliers for thermal panels, tanks (with heat
exchangers), circ pumps, etc. Is UMA a
Lars,
Yes, the only way you can even consider an install like this is a pole
mount, with a steep tilt in the winter to shed most of the snow. It would help
to know if the place will be used in the winter or summer and how big of an
array in KW or Sq Ft. Customer would have to
Jay,
Is this an existing home or to-be-built home? PGE hasn't let me
run anything bigger than 10% over the customer's last 12 months average
monthly consumption through their interconnection/engineering. If this is a
yet to be built home, the system size will need justification
Kevin,
Not to add any confusion but I recently had to re-program the slave in
a 2 VFX with Xfrmr system as it was doing the same thing...the 2 pole xfrmr
breaker was tripping when a moderate load was on. Granted this was not
happening during charging though. I think I changed the
-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On
Behalf Of frenergy
Sent: Thursday, March 19, 2015 8:56 AM
To: RE-wrenches
Subject: [RE-wrenches] Load sheet
Wrenches,
I'm always trying to update my reference for KWhrs/day for various
loads, especially as time
Technical Sales Professional
New Mexico EE98J Journeyman Electrician
Founder (Retired), Positive Energy, Inc.
505 780-2738 cell
!--[if !supportLineBreakNewLine]--
!--[endif]--
On 3/30/2015 10:03 AM, frenergy wrote:
Fellow Wrenches,
I just called Tap
Fellow Wrenches,
I just called Tap Plastics hoping they would solve my problem of
battery acid containment within a plywood battery box. I was surprised by
their response that the acrylic was not impervious to acid and polyethylene
would not work because sealants nor caulking adhere
Hey Dan,
Of course we need to discuss the surroundings of any particular
roof...valleys, vents, type of top-down clamps, are the PVs at, below or
slightly above the ridge of the roof, etc. I assume we're talking about a metal
roof? Some roofs see more warmth than others from the
Hey Allan
Around these parts the Snorkel Tub is the backwoods basic hot tub of
choice. Its just a hot...tub, woodfired, in the past, no circ pumps.
www.snorkel.com/
Of course by now they may have some of the amenities of today's conventional
tubs. Oh, I see they now have gas
Wrenches,
I'm always trying to update my reference for KWhrs/day for various
loads, especially as time marches on folks are of course wishing to power the
latest gizmo with an off-grid system. I can't seem to find very current info.
The days of going into search are certainly long
interference?
Never had a problem with DC .
Jerry
On Apr 12, 2015 6:16 AM, frenergy frene...@psln.com wrote:
Hey folks,
Has anyone found a problem running a RTS cable in FMC conduit with the
battery-to-inverter cables?
Thanks,
Bill
Feather River Solar Electric
My recent experience with SMA was $150 for the warranty change out of one of
their string inverters. It was a significant hassle and took months to receive
a check. You have to know that they offer the $150, If you don't ask, they
won't offer it. Whereas Fronius almost insists they pay you
I wasn't going to say anything but I have to now say right-on. I only saw
one image (hammer) in your email, William, so maybe the other image is the
other high-tech tool we use...a fist.
If its one comp roof layer, this method is very accurate, maybe because
I've used it so many
Esteemed Wrenches,
One of my customers (who is also an Electrical contractor) asked me why
metal conduit is required from the combiner to the inverter. In this case the
DC run will go under the house in the crawl space before exiting the foundation
and up to the DC disco on the
Maybe equally as important is performance. I also have a conventional 1/2 HP
120 vac Sta-rite submersible supplying our water for 21 years with no issues.
It certainly has it's surge at start however the 2, OBFX3524's (120 vac only)
running it seems to have dealt with it for many years.
Hey folks,
Has anyone found a problem running a RTS cable in FMC conduit with
the battery-to-inverter cables?
Thanks,
Bill
Feather River Solar Electric
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Kirk,
Staber used to tout the tolerance their machines had to Mod sine
inverters and they are made in the US. I guess you'd have to define local.
We just replaced our old Staber a year ago, which suffered through our family
of 4 for 17 years...and we bought another Staber.
Bill
Folks,
I looked back in the archives with no luck. Specifically, has
anyone experienced any problems with RF/Ham radio operation and SMA TL-22
inverters. I seem to be pretty partial to them lately and I have a
potential job with the customer asking about possible problems with
Jay,
I hate to throw cold water on the Li-ion alternative for an ATV, but I
did exactly that when my Li-ion pack caught on fire in my E-Force ATV that was
converted to Li-ion. I'm now back to sealed LA. The cells and BOS were about
4 years old so maybe all that is getting more dialed
Wrenches,
I'm trying to find at least 2 Mitsubishi 170's (PV-MF170EB3). Please
contact off-list.
Thanks,
Bill
Feather River Solar Electric___
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Change
Wrenches,
Customer currently has a hacked up 200 amp Sylvania meter/mains panel.
He also is averaging a load of 74 KWhrs/day! which will require about 15 KW
system size at this site. Obviously a system this size cannot backfeed the
busses in the load center. Because the exiting
This is good stuff, enlightening...but begs another small? detail that has
obvious big ramifications. Where o where does the BTS get placed to best read
the actual temperature of the battery? It's too big to fit on many terminals
especially once cabled, it's certainly not very accurate when
Hopefully there tech department can shed some light on this for you, however,
it would certainly be to SolarEdge's benefit to appear to be producing more
power than it really is, well, unless, H ..
Bill
- Original Message -
From: jarmo.venalai...@schneider-electric.com
Hey Jay,
From what I've heard form battery manus, the C rates likely even in a
well PV-ed system still will not produce C-rates high enough to approach a high
or longevity reducing internal battery temp, assuming a typical bulk, absorb,
float cycle. Of course, battery environmental
Dana,
I am no expert with ground source heat pumps, but I suspect that the
measurement you took was when the resistance heat strips were on, which will
only be used very infrequently in a properly designed and operated GSHP system.
Despite that, GSHP can be used off-grid with the heat
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