Search found 948 matches

by T1 Terry
Today, 10:44
Forum: General EV Discussion
Topic: Making home EV ready
Replies: 36
Views: 577

Re: Making home EV ready

I don't want to shunt it to earth, just block it from being present on the solar/battery lines. Just DC to one side of the diode and mixed AC and DC inside the inverter covers where it would involve removing an access panel to be exposed to the AC element on the DC lines.

T1 Terry
by T1 Terry
Yesterday, 12:46
Forum: EV Motoring
Topic: The Aptera is back
Replies: 26
Views: 248

Re: The Aptera is back

If you put enough paint and spin on a dead horse it will finally get up and run for a while. Look at the flow batteries from there first proper entry into the market back in 1980 - 86 by Maria Skyllas-Kazacos at the University of NSW. It had a rebirth in the late 90's and again around 2009 and the l...
by T1 Terry
Yesterday, 12:30
Forum: Renewable Energy and Storage (Non-EV)
Topic: Sumry Inverter-Charger in Caravan
Replies: 7
Views: 154

Re: Sumry Inverter-Charger in Caravan

Thanks Dave, so around the 3700w mark to run both air con units flat out, not bad at all. We installed a 12v 700Ah lithium battery a number of yrs back and the owner decided last summer that he should have an air con installed because he now had batteries that could handle the load. He installed a V...
by T1 Terry
Yesterday, 10:56
Forum: Renewable Energy and Storage (Non-EV)
Topic: Sumry Inverter-Charger in Caravan
Replies: 7
Views: 154

Re: Sumry Inverter-Charger in Caravan

For those with a Sumry or contemplating same: I now have my 5kVA unit running two LG split air conditioners. Each is 6,000W and the SUMRY handles both with ease, even on maximum cooling or maximum heating both running together. The Sumry is driven by 8x AVASS bus cells. Cheers, Dave I am assuming t...
by T1 Terry
Yesterday, 10:52
Forum: General EV Discussion
Topic: Making home EV ready
Replies: 36
Views: 577

Re: Making home EV ready

Checked out the price for the 600vdc 60 amp Morningstar MPPT controller .... ouch, around the $2,000 mark, would something like this block the AC on the solar/battery lines https://au.rs-online.com/web/p/rectifie ... s/8776418/

T1 Terry
by T1 Terry
Yesterday, 09:03
Forum: General EV Discussion
Topic: Making home EV ready
Replies: 36
Views: 577

Re: Making home EV ready

The output side of the inverter (240vac) must be isolated from the DC solar input, surely, otherwise there would be both 450vdc and 240vac on the same conductors and the solar isolators are only designed for max 500vdc so I'm not sure if they have an AC rating at all. The AC component is only from ...
by T1 Terry
Thu, 17 Oct 2019, 12:57
Forum: General EV Discussion
Topic: Making home EV ready
Replies: 36
Views: 577

Re: Making home EV ready

Ah, interesting, I haven't even bought the MG inverters yet but I do have a couple of MS inverters with the lower solar open circuit voltage, will these have the same effect of AC on one leg of the solar to earth?

T1 Terry
by T1 Terry
Thu, 17 Oct 2019, 11:12
Forum: General EV Discussion
Topic: Making home EV ready
Replies: 36
Views: 577

Re: Making home EV ready

This set up isn't intended to feed back into the mains or even be mains connected, it is for an off grid stand alone system or SPS as the Clean Energy Council calls it. The output side of the inverter (240vac) must be isolated from the DC solar input, surely, otherwise there would be both 450vdc and...
by T1 Terry
Wed, 16 Oct 2019, 13:40
Forum: Members Machines
Topic: Brendon_m Moke
Replies: 154
Views: 10298

Re: Brendon_m Moke

It would get you from our house to our workshop and back home again, maybe even twice. The hospital, doctors, dentist, 2 solicitors and 3 real-estate agents and 2 accountants, post Office, hardware store, 2 food stores, 2 bottle shops, 2 bakeries 2 pubs and a club are all on the same section of road...
by T1 Terry
Wed, 16 Oct 2019, 13:29
Forum: General EV Discussion
Topic: Making home EV ready
Replies: 36
Views: 577

Re: Making home EV ready

I think with the particular inverter I'm looking at, PIP5048MG, the solar is boosted first, then enters what ever creates 240vac and 48vdc out of that. When the solar is not present, the inverter uses the 48v nom. battery voltage, so I'm guessing it boosts the 48vdc to what ever the feed in DC volta...
by T1 Terry
Wed, 16 Oct 2019, 09:16
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 429
Views: 28423

Re: Prelude conversion project - some questions

As far as the "Beaching itself" back when I worked for Western Road Bus Service, we had a bus that would bottom out mid way between the wheels on a few intersections with deep gutter drains that were part of the normal route. Rather than continually having the passengers freak out at the scrapping a...
by T1 Terry
Wed, 16 Oct 2019, 08:59
Forum: General EV Discussion
Topic: Making home EV ready
Replies: 36
Views: 577

Re: Making home EV ready

So, back to the strange nom cell voltage thing. Can you confirm the end of charge battery voltage please Richard? My back of the envelope I'm doing my calculations on is getting rather hard to read now I've made so many changes :lol:

T1 Terry
by T1 Terry
Tue, 15 Oct 2019, 12:06
Forum: General EV Discussion
Topic: Making home EV ready
Replies: 36
Views: 577

Re: Making home EV ready

So, 96 x 4.2v = 403.2v, so stop at 400vdc would keep the cells just under the 4.2v mark. So the series string needs 12 panels now for an STC open circuit voltage of 462vdc and an operating temp open circuit voltage of around 408v @ 50*C. The bugger now is the 462vdc open circuit with cold panels is ...
by T1 Terry
Tue, 15 Oct 2019, 10:40
Forum: General EV Discussion
Topic: Making home EV ready
Replies: 36
Views: 577

Re: Making home EV ready

Terry - I think the Kona is either 96 or 98 cells in series - when fully charged it hits 400-407 V DC. So the 356v divided by 98 cells in series puts the nominal voltage at 3.63v per cell and 98 cells @ 4.2v = 411v. So the 407v is with the cells just below the 4.2v mark, but the 3.63v nom is a stra...
by T1 Terry
Tue, 15 Oct 2019, 08:30
Forum: General EV Discussion
Topic: Making home EV ready
Replies: 36
Views: 577

Re: Making home EV ready

I found it after a few Google searches, 356v ... I'm guessing that is nominal so what is the nominal voltage of each cell? Non of the standard nom battery voltages divide evenly into 356v so maybe that is end of charge voltage? 86 x 4.135v = just short of 356vdc. The voltage is well within the solar...
by T1 Terry
Fri, 11 Oct 2019, 10:15
Forum: General EV Discussion
Topic: Making home EV ready
Replies: 36
Views: 577

Re: Making home EV ready

Does anyone know what voltage the Kona battery pack is? I've been seriously thinking about a solar array wired to meet the voltage of my chosen EV so I can direct charge the EV battery. If the voltage is less than 450vdc then I can also use the EV's battery to power the inverter to run the house at ...
by T1 Terry
Thu, 10 Oct 2019, 13:56
Forum: EV Motoring
Topic: The Aptera is back
Replies: 26
Views: 248

Re: The Aptera is back

I wonder if you can get an add on package that includes the wings and tail .... and maybe a propeller so you can get up enough speed to take off into a headwind and glide to the next destination :lol: Solar powered and will travel 60km on a full charge, my plug in Prius is solar powered and will tra...
by T1 Terry
Wed, 09 Oct 2019, 14:16
Forum: Charging Infrastructure
Topic: Rural Fast Chargers + Servicing infrastructure in Rural areas
Replies: 3
Views: 120

Re: Rural Fast Chargers + Servicing infrastructure in Rural areas

I know it isn't particularly fast charging, but caravan parks have 15 amp outlets. It is at least a last resort method of recharging and could be useful if over night stops were planned to use a caravan park cabin or on site van for the accommodation. Staying at a pub or motel would be another optio...
by T1 Terry
Tue, 01 Oct 2019, 13:53
Forum: Members Machines
Topic: Brendon_m Moke
Replies: 154
Views: 10298

Re: Brendon_m Moke

Make the steady out of aluminium and add bushings to take the initial shock loads at the joint ends. aluminium is a lot more forgiving than cast or even steel, it can stretch and compress small amounts that take the initial shock load. This is why high performance ICE engines use aluminium con rods,...
by T1 Terry
Sat, 28 Sep 2019, 12:17
Forum: Nissan Leaf
Topic: Leaf in the tropical north
Replies: 12
Views: 423

Re: Leaf in the tropical north

Something I've always wondered, if heat rises and cold falls, wouldn't blowing cold air above the battery pack and exhausting it below the battery pack a better method for cooling? I see all these cooling plates the cells sit on, but wouldn't that be the coolest part of the cell? Tesla run pipes up ...
by T1 Terry
Sat, 28 Sep 2019, 09:51
Forum: Electric motors and controllers
Topic: Nidec In wheel Motor
Replies: 3
Views: 218

Re: Nidec In wheel Motor

20" wheels, sound suited to truck 22"wheels eh. Isn't that truck company Tesla now owns building just that? A hub motor capable of only 50kW would revolutionise the trucking industry. A prime mover has 4 rear wheels, that's 200kW on the ground, add a dolly to tow a trailer, that has 6 wheels on the ...
by T1 Terry
Wed, 25 Sep 2019, 15:38
Forum: Renewable Energy and Storage (Non-EV)
Topic: Sumry Inverter-Charger in Caravan
Replies: 7
Views: 154

Re: Sumry Inverter-Charger in Caravan

An RVD, not an RCD because an RCD will only work if there is an earth/neutral bond before the RCD. If you are never going to plug into shore power that will have its own RCD and earth/neutral bond, then get your sparkie to make the earth/neutral bond after the inverter but before the RCD. The proble...
by T1 Terry
Wed, 25 Sep 2019, 10:41
Forum: Renewable Energy and Storage (Non-EV)
Topic: Is anyone using an arc welder with an offgrid system
Replies: 104
Views: 3556

Re: Is anyone using an arc welder with an offgrid system

Skip the copper stake bit, that is to make a connection back to the transformer or the power generator. You have the power generator on board in the form of an inverter. If the generator is a plug in device and has a fault to the metal frame and that is sitting on the ground, the stake will make a c...
by T1 Terry
Sat, 21 Sep 2019, 09:38
Forum: Batteries, charging, management and monitoring
Topic: Cooling chargers?
Replies: 10
Views: 220

Re: Cooling chargers?

Just a thought, they made small diameter paper filters for minis and other Leyland product as well as aftermarket filters, mainly aimed for use with SU and CD Stromberg type carburettors. One of those on Richard's drum fan suggestion would fit easy enough, but if you have a 12vdc supply available yo...
by T1 Terry
Fri, 20 Sep 2019, 10:07
Forum: Batteries, charging, management and monitoring
Topic: Cooling chargers?
Replies: 10
Views: 220

Re: Cooling chargers?

Thanks T1 Terry. Good ideas! I hadn't thought of air filters either so this morning I will be off to my local car spare parts place to see what they have. Thanks again Paul Something simple like the round air filter from the old 6cyl Holden is a big enough area to fit fans inside and cheap as chips...