Re: [RE-wrenches] lithium battery question

First time I cycled my BYD batteries I got 20% more than rated kWh out of them. Based on third party Ah reading. Hugh ⁣Get BlueMail for Android ​ On 24 Aug 2020, 23:32, at 23:32, jay wrote: > >Dear lithium experts > >Do lithium LFP or NMC batteries have a break in period ( a cer

Re: [RE-wrenches] VFX produces no output with no error

Hi All, Just to wrap this one up I can report that the problem was in the control board in this instance, and having replaced this board it is now working again. Thanks for all who helped with advice, especially Jay and Kris. cheers Hugh Hugh Piggott Scoraig Wind Electric Dundonnell Ross

Re: [RE-wrenches] VFX produces no output with no error

they do seem to need it. cheers Hugh Scoraig Scotland > On 9 Mar 2020, at 18:20, Ray wrote: > > We had one last year with a bad relay, the customer had been charging a Tesla > EV through it (pass through from the grid) and smoked the relay. It was > pretty obvious, the clear rela

[RE-wrenches] VFX produces no output with no error

pieces and try to figure out a hardware failure but I wonder if anyone has seen this and can give me a clue? cheers Hugh Hugh Piggott Scoraig Wind Electric Dundonnell Ross shire IV23 2RE, UK +44 77 1315 7600 h...@scoraigwind.co.uk www.scoraigwind.co.uk <http://www.scoraigwind.co

Re: [RE-wrenches] heating lithium in cold weather

I am trying out an insulated box and small heater. It doesn't get very cold in West Coast scotland so 120W seems useful. Also automatic vents used on greenhouses, to open up the sealed box. On Fri 17 May 2019, 18:09 Dave Angelini Offgrid Solar, wrote: > The risk may be worth it if the battery is

Re: [RE-wrenches] Low Voc for effective string?

to feel any shortage of solar energy. Days are long. Charge current is low. As I said it’s a very interesting thread on which I often feel like a lone heretic. cheers Hugh > On 13 Sep 2018, at 02:55, Sindelar Solar <mailto:al...@sindelarsolar.com>> wrote: > > Bill and all,

Re: [RE-wrenches] Battery load tester purchase advice?

I have used a load resistor on a voltage controlled relay VCS from solar converters and a USB data logger. I only used the relay because I didn't want to kill the battery or sit watching. USB voltage loggers are good things to own anyway. Hugh On 6 August 2017 17:18:51 BST, Steve Hi

Re: [RE-wrenches] Conext SW 4024 with bad firmware

fix to it using “genman mode”. I just wonder if you have witnessed the process and checked whether the generator’s own built-in cool down period could be the cause. cheers Hugh > On 30 Dec 2016, at 00:43, Lou Russo wrote: > > Thanks to all for the input and suggestions, it is much ap

Re: [RE-wrenches] Grid neutral

neutral, but where a number of diverse circuits are connected there will be some imbalance, so you need a wire there, but it need not be as heavy as the 3 “hot" ones. cheers Hugh Hugh Piggott Scoraig Wind Electric Dundonnell Ross shire IV23 2RE, UK +44 77 1315 7600 h...@scoraigwind.

Re: [RE-wrenches] New washers and dishwashers on inverter power -any problems?

ne is just good for peak usage and the fact that there is another house connected. good times! My favorite thing (almost) about renewable energy is the fact that sometimes there is way too much of it. Hugh On 7 Dec 2014, at 16:43, frenergy wrote: > Hugh, > > We've d

Re: [RE-wrenches] New washers and dishwashers on inverter power - any problems?

PG is the last resort for us. Hugh On 4 Dec 2014, at 01:14, Dave wrote: > I'm looking at Bosch # 16083 ($ 765) dishwasher - any problems running this > on OutBack inverter power? > > and also a Samsung, or LG, front load clothes washer. I'm a little gun shy > with t

Re: [RE-wrenches] common ground on fm80 aux output?

to do this for sure. I would check the potential of the aux negative but I don't have any such controllers here on scoraig and I want to know the score before I go on site to install the SSR. thanks to all Hugh On 6 Dec 2014, at 00:09, jay peltz wrote: > Hi Hugh > > I use 3-32vd

Re: [RE-wrenches] common ground on fm80 aux output?

Hi Hugh again Just to clarify the set up: The SSR controls the AC power from the inverter to the heating load. It switches partway through each half cycle and thus controls the power to the load. The input to the SSR requires a power supply 8-32 V present all the time it is working. I suppose

[RE-wrenches] common ground on fm80 aux output?

hi wrenches, I am installing some load controls for a client who has a FM80 controller. I don't have experience with this product. It has a 12V aux output that I wish to drive an SSR but the wiring is complicated by the fact that this SSR also needs a power supply as well as a control signal. I

Re: [RE-wrenches] "Extra Low Voltage"

defined? What other factors are applicable such as status (homeowner, installer, paid/unpaid) and location (inside home, wet location, etc)? Thanks for any observations. Hugh On 5 Mar 2014, at 08:34, Hugh Piggott wrote: > hi All, > > I am trying to find some general statements that ca

[RE-wrenches] "Extra Low Voltage"

ge depending on various factors, one of which is whether it is "separated" (floating and well insulated) or not. Many of us work with battery systems, and not everyone is a certified electrician. I'd love to know some ground rules. thanks! Hugh Hugh Piggott Scoraig Wind Electric

Re: [RE-wrenches] 75W module match

I have installed a lot of BP 380 and BP 485 panels that I think have the same frames. But it's all on a what you can find basis now since they have given up on the retail market, I am told. cheers Hugh (with a nice array of 275s still doing good work on my old house) On 13 Apr 2012, at

Re: [RE-wrenches] small wind generators

Interesting thread! We are having some success with a Kestrel turbine here on Scoraig I second the idea that Ampair offer a modest but very robust range of products for high wind sites. cheers Hugh Piggott On 3 Apr 2012, at 20:36, Richard L Ratico wrote: > Does anyone have any experie

Re: [RE-wrenches] DC power for LED lighting

lies to two strings that are connected each to its own regulated supply. If a tiny difference in voltage matters (which I doubt) then you will have the same issues with a single string. What am I missing? thanks Hugh ___ List sponsored by Home Pow

Re: [RE-wrenches] Diversion load for AC coupled system

sible that the NEC thing does not required you to look at float voltage. all the best, -- Hugh Piggott Scoraig http://www.scoraigwind.co.uk ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settin

Re: [RE-wrenches] Diversion load for AC coupled system

More about the subject here. http://scoraigwind.co.uk/?page_id=637 Best wishes, -- Hugh Piggott Scoraig http://www.scoraigwind.co.uk ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: h

Re: [RE-wrenches] intermittent battery problem; The Last Word

and before recharging, ask them to check each battery with this meter? That would identify or rule out the intermittent internal resistance theory. If it exists, it's just in one battery. Presumably. Hugh Larry, the customer has been fully charging and equalizing every week to two weeks fo

Re: [RE-wrenches] Home Depot solar?

;t be long before Dairy Queen will be selling inverters with a large shake. Jeffrey Yago, pres. -- Hugh Piggott Scoraig http://www.scoraigwind.co.uk ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options

Re: [RE-wrenches] unique battery bank design question

25% of the time and it takes 4 times longer for everything to go pear shaped. Another option I've been reading up on is a Battery Equalizer/Battery Balancer. This seems like a valid solution, yes. best wishes, -- Hugh Piggott Scoraig http://w

Re: [RE-wrenches] unique battery bank design question

% efficient and probably ending in tears. -- Hugh Piggott Scoraig http://www.scoraigwind.co.uk ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cg

Re: [RE-wrenches] unique battery bank design question

battery, given enough surplus energy availability (which is usually the key thing for battery health). Just a thought. The snag is the cost. ho hum. -- Hugh Piggott Scoraig http://www.scoraigwind.co.uk ___ List sponsored by Home Power magazine L

Re: [RE-wrenches] Jacobs Wincharger Book, 1978?

I've got a copy of the 'Handbook of Homemade Power' 1974 by the staff of mother earth news. But you can't have it, nah. -- Hugh Piggott Scoraig http://www.scoraigwind.co.uk ___ List sponsored by Home Power magazine List

Re: [RE-wrenches] National grid hertz adjustment

demands of variable renewable inputs and limited, expensive electricity availability. Loads that turns off at low Hz and others that turn on with high Hz could be very good for the grid. -- Hugh Piggott Scoraig http://www.scoraigwind.co.uk ___ List sponsor

Re: [RE-wrenches] 24 volt Battery Bank comparison

lers. To me the issues of unbalanced charging are much worse for batteries in series than they are for batteries in parallel. Now I will go and hide from the wrath of the list :-) have fun, -- Hugh Piggott Scoraig http://www.scoraigwind.co.uk___ List

Re: [RE-wrenches] AGM battery charging, more details

ttery whilst preventing the balloon of gas in your dramatic photo. I will read the document that you reference (about thermal runaway) carefully. I am sorry if I seem a slow learner. This list is an invaluable resource for the industry. I like to ask naive questions and I get a deeper underst

Re: [RE-wrenches] AGM battery charging, more details

At 13:10 -0700 28/4/11, Starlight Solar, Larry Crutcher wrote: Hugh, One last point about the Solar Boost IPN product: Once you have programmed the 2512iX charge controller from the IPN Pro, the controller retains the information and can be installed as a stand-alone unit. That means you can

Re: [RE-wrenches] AGM battery charging, more details

Hi Bill, Hugh, .25 x C20 would be a C80 rate Sorry I did not mean that, and I do not think that is what the manufacturers instructions mean either. They mean 0.25 times the C20 capacity. That is closer to the C4 rate! (And they say 'up to 0.35 x capacity' ). All controllers

Re: [RE-wrenches] AGM battery charging, more details

ould actually damage a sealed battery. Then I would simply charge them as hard as the wind/sun allows while avoiding doing that. -- Hugh Piggott Scoraig http://www.scoraigwind.co.uk___ List sponsored by Home Power magazine List Address: RE-wrenches@

[RE-wrenches] Outback FNDC

HI Hugh and all As Hugh knows the Outback FNDC was meant for such operation, Apollo can track the SOC but can not control off SOC. I have been studying the FlexmaxDC manual and it is a wonderful measurement instrument, but it has no direct communication with the charge controller (set

Re: [RE-wrenches] AGM battery charging, more details

ly without? thanks! Hugh At 18:41 -0300 25/4/11, James Surrette wrote: Content-Type: text/html; charset=US-ASCII Content-Description: HTML Hi Hugh, Here is the charging information for our AGMs. Please let us know if you need anything else. <http://www.surrette.com/content/agm-faqs&

Re: [RE-wrenches] AGM battery charging, more details

ttery properly without drying it out. -- Hugh Piggott Scoraig http://www.scoraigwind.co.uk ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wr

Re: [RE-wrenches] Battery at temp

At 07:36 -0700 24/4/11, jay peltz wrote: Hi Hugh, The other thing to consider with heat is that higher temperatures while increasing capacity also decrease life ( more active chemical reactions, and conversely lower temps increase battery life. Yes this appears to be the only downside of

Re: [RE-wrenches] AGM battery charging, more details

urther pointers... -- Hugh Piggott Scoraig http://www.scoraigwind.co.uk ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

Re: [RE-wrenches] Battery at temp

p is 77-80°F. Lower than normal temps. will reduce capacity, slightly extend life, require a higher recharge voltage, & cause SG readings to be adjusted down. HIGHER TEMPS HAVE THE OPPOSITE EFFECT". -- Hugh Piggott Scoraig http://ww

Re: [RE-wrenches] AGM battery charging, more details

echnology on an opportunity charging system where the battery may be in any state of charge when the wind starts blowing, or sun starts to shine. best wishes, -- Hugh Piggott Scoraig http://www.scoraigwind.co.uk ___ List sponsored by Home Power m

[RE-wrenches] AGM set-points for 'opportunity charging'

o settings in a slightly random fashion. I am also puzzled by the above statement where Larry charges each battery string at constant current, unregulated voltage. I wonder what current is suitable? thanks -- Hugh Piggott Scoraig http://www.scoraigwind.co.uk_

Re: [RE-wrenches] Air conditioning for batteries in high temperature climate

Hi Roy, Hi temperatures will hit the battery capacity but will the battery efficiency be that much affected? If the battery capacity is inadequate then you need to compare the aircon running cost to the cost of buying a 10% larger battery. Don't you? Cheers Hugh Bob is correct,

Re: [RE-wrenches] Batteries in parrallel Failure

roach to parallel strings that has not been mentioned here is to put in cross bonds to link the strings at each battery or cell terminal. That way a single cell cannot affect the whole string, it just pulls down the cells in parallel with it - which are a lot like an extension of the same cell i

Re: [RE-wrenches] Morningstar relay driver configuration help

wild swings in voltage. Not sure how clever a wizard would have to be to figure out all of the circumstances in such cases but it does not take long to load and test a new configuration on site in good test conditions. A few more example configurations would be helpful. cheers Hugh Piggott

Re: [RE-wrenches] Morningstar relay driver configuration help

ew edition out last month so I will download and try that. http://www.morningstarcorp.com/en/support/item.cfm?ItemId=400 Seems pretty self-explanatory to me but the manual is there for reference too. I did not know that there was any other way to set them up. -- Hugh Piggott Scoraig http://w

Re: [RE-wrenches] Incompatible Metals

r the theory anyway. -- Hugh Piggott Scoraig http://www.scoraigwind.co.uk ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wre

Re: [RE-wrenches] To insulate a battery bank

ambient if insulated. -- Hugh Piggott Scoraig http://www.scoraigwind.co.uk___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches

Re: [RE-wrenches] sw plus AGS

OK mystery solved. Stuff has changed since the 1990s. I wonder why it's not called the SW MINUS then? Good old Xantrex. thanks Hugh Hugh: I apologize for disagreeing, but the SW PLUS does not have internal relays (the PS does not either). It relies on an external AGS module tha

Re: [RE-wrenches] sw plus AGS

additional functions. Hugh Piggott Warren: I can see a few: 1. It will not interface with the SW plus, 2. It will not take advantage of the charging intelligence or load start functions in the SW plus. 3. It will work on a 48 volt system. 4. Analog settings are generally very approximate, espec

Re: [RE-wrenches] Expected Life of SW Inverters

tormy weather. best -- Hugh Piggott Scoraig http://www.scoraigwind.co.uk ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.

Re: [RE-wrenches] AC voltage in North America

V. In general, most of the world uses the 230V standard. This also means that standard 230V equipment can be used in most parts of the world, with only a minor change in the equipment's electrical plug for a specific country." Hugh Darryl, thank you for that! i've often wondered myse

Re: [RE-wrenches] Mac compatibility with Modsine

an the peak, roughly 71% like a sine wave. -- Hugh Piggott Scoraig http://www.scoraigwind.co.uk ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/op

Re: [RE-wrenches] Generators and Grid-tie Systems

ct reverse power and add a dump load? Seems a shame to kill the renewable input when the grid is down. -- Hugh Piggott Scoraig Wind Electric Scotland http://www.scoraigwind.co.uk ___ List sponsored by Home Power magazine List Address: RE-wrenche

Re: [RE-wrenches] calculating DC voltage line loss

spreadsheet or even do the calcs quickly in your head to a useful level of accuracy once you have a bit of experience. As I say its a lot easier with metric units where the wires sizes are multiples of 1 sqmm, and about 28 metres of that stuff is one ohm. -- Hugh Piggott Scoraig Wind El

Re: [RE-wrenches] Small Wind system monitoring

shows windspeed and other data. http://www.logic-energy.com/ -- Hugh Piggott Scoraig Wind Electric Scotland http://www.scoraigwind.co.uk ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings:

Re: [RE-wrenches] Capacity loss due to rapid discharge

age. It does not tell you the SOC of a battery. This last is a very hard thing to ascertain. :-) -- Hugh Piggott Scoraig Wind Electric Scotland http://www.scoraigwind.co.uk___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.r

Re: [RE-wrenches] Capacity loss due to rapid discharge

he backup. Thanks again for all the input to this thread. best Hugh At 11:47 -0800 18/1/10, Kent Osterberg wrote: Hugh, You may be interested in this article "A critical review of using the Peukert equation for determining the remaining capacity of lead-acid and lithium-ion bat

Re: [RE-wrenches] Fwd: discharging Rolls batteries

n-member Julie Haugh: - - - - - Hugh Piggot writes: According to Peukert's law (and manufacturers' data bears this out well) the capacity of a battery depends on the rate of discharge. Everyone who knows anything about batteries knows that the capacity is specified at a certain r

Re: [RE-wrenches] discharging Rolls batteries

not true. That's probably enough for now, if anyone has bothered to read this far. Thanks for any reactions. -- Hugh Piggott Scoraig Wind Electric Scotland http://www.scoraigwind.co.uk___ List sponsored by Home Power magazine List Address: RE-

Re: [RE-wrenches] discharging Rolls batteries

ent. Fair enough but what are the numbers used in the negotiation, and are they temperature dependant? Thanks, Joel for the reading matter which I am working on! I hope to become wiser in due course. best Hugh At 17:45 -0800 15/1/10, Joel Davidson wrote: Some charge energy is lost in heat

Re: [RE-wrenches] discharging Rolls batteries

ittle bit like current of 10 amps entering one end of a piece of wire and only 9 amps coming out the other end. I understand that the volts go down due to voltage drop (in this analogy) but loss of current is entirely a different matter. Thanks for any help with this rather obscure question.

Re: [RE-wrenches] discharging Rolls batteries

scharge rate is reduced. To what extent is the capacity actually lost by using high discharge rates and to what extent is it just a voltage effect that impacts on the terminal voltage, rather than the actual chemical state of the battery?) I hope you can follow my descriptions. -- Hugh Piggot

Re: [RE-wrenches] discharging Rolls batteries

w battery disconnect, genstart, etc). I would be interested to know if this type of temperature compensation exists and indeed whether it is legitimate in terms of sustainable battery management. Hugh Hugh, Sorry if you found my response limited but have been traveling since early this am

Re: [RE-wrenches] discharging Rolls batteries

ain. I do have a few more that I will save for now. Thanks for any more comments. best wishes Hugh Hi Hugh, When discussing battery characteristics with a chemist at my supplier years ago I was told the capacity at 0 deg c is around 50% of that at 25 deg c because the ion transfer rate

Re: [RE-wrenches] discharging Rolls batteries

on of such devices after a few partial charge swings up and down over period of days. So the reality is that we rely on inverter LBCO settings or rules of thumb such as "never let the voltage drop below 47" to ensure that the batteries do not get abused. Best wishes Hugh Hi Hugh & W

[RE-wrenches] discharging Rolls batteries

at do I tell my customers about the end-of-discharge voltage for sustainable cycling of their Rolls batteries? And is it temp compensated? thanks -- Hugh Piggott Scoraig Wind Electric Scotland http://www.scoraigwind.co.uk ___ List sponsored by

Re: [RE-wrenches] Strings and series of batteries with reverse return linkup

e difference in mentality between solar users (who count out the amp hours and know exactly what they have to work with each day) and wind users (who can party like mad sometimes and then have nothing at other times). Hugh Hugh, Feeding off diagonal corners, as you are describing, only keep

Re: [RE-wrenches] Strings and series of batteries

e negatives, to parallel the battery, then the only issue is where you connect the charge source and/or inverter." Hugh, The connection is very easy, if you look at the photos on the page I linked to the connections to the inverter breaker (which is where I also connected the charge source) c

Re: [RE-wrenches] Strings and series of batteries

tant death due to carelessness. -- Hugh Piggott Scoraig Wind Electric Scotland http://www.scoraigwind.co.uk ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/

Re: [RE-wrenches] Generator bonding discussion

guaranteed to have a lethal voltage between the generator frame and house ground. That doesn't seem likely to be the safest solution although it might be the simplest to install. -- Hugh Piggott Scoraig Wind Electric Scotland http://www.scoraigwind.

Re: [RE-wrenches] micro-hydro distribution problem

ted to the largest house or the nearest. Seemed to work pretty well. Better than I expected actually. The inverters behaved gracefully under system overload for example. If the hydro flow drops off a bit they do not crash the system. have fun. Hugh Esteemed fellow wrenches: May we put

Re: [RE-wrenches] Charging AGM Batteries

is reached. So...if you set that for a high value the same high rate would be present not only when the battery is highly depleted but also when the battery is approaching 80% state of charge. That seems scary to me. -- Hugh Piggott Scoraig Wind Electric Scotland http://www.sc

Re: [RE-wrenches] AC coupling induction generators (was Solar and pumped hydro)

portant to have a voltage regulator on the hydro. There is also plenty of dump power to be allocated. I got my controller from "Nigel Smith" . -- Hugh Piggott Scoraig Wind Electric Scotland http://www.scoraigwind.co.uk ___ List spo

Re: [RE-wrenches] Fwd: Grounding on a glacier??

e-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org -- Hugh Piggott Scoraig Wind Electric Scotland http://www.scoraigwind.co.uk___

Re: [RE-wrenches] Fwd: Grounding on a glacier??

fuses, breakers and switch contacts. -- Hugh Piggott Scoraig Wind Electric Scotland http://www.scoraigwind.co.uk___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/

Re: [RE-wrenches] Fwd: Grounding on a glacier??

a new wiring system called Protective Multiple Earthing where the ground and neutral are combined into one wire (saving on cost). This has the interesting side effect that the whole house will become 'hot' in the event of a failure of this one conductor. -- Hugh Piggott Scora

[RE-wrenches] Workshops in Washington

i...@solarenergy.org Maybe I will get to meet some of you there. Best wishes, -- Hugh Piggott Scoraig Wind Electric Scotland http://www.scoraigwind.co.uk ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Optio

Re: [RE-wrenches] voltage drop

tres is a better choice for normal ambiences. -- Hugh Piggott Scoraig Wind Electric Scotland http://www.scoraigwind.co.uk ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-