Fruit Trader

5 hours ago, Lacessit said:

 

The video makes a good point when you consider the following.

Unlike liquid fuel, power delivery for EV charging stations is a lot more complex than simply placing an order. Some locations will have capacity to meet a stations maximum demand where others might need a diversity plan to limit power when all chargers are in use. Diversity calculations happen at all levels of power distribution. 

Not all EV owners will be charging at home and demand for reliable high output charging facilities will increase.

Link to article about capturing diversity

5 hours ago, Bandersnatch said:

 

As OP this was in my original post some 4,000 posts ago.

 

I posted this as I knew that the haters would be out in force to hijack this discussion as they have done for so many others. 

 

They clearly don’t want anyone to buy an Electric Car and will spread disinformation, loony theories and pathetic lies to achieve their objective.

 

Most are incapable of constructing a coherent argument and due to a lack of formal education have no comprehension of the scientific method. Most of what they post is uniformed opinions and hearsay.

 

Feeding the troll only encourages them.

 

It is best to ignore them or suffer the fate described best by Mark Twain.

 

I also like the one about playing chess with a pigeon. 

If you can't handle a public forum that includes all walks, take your discussion to a private safe space. The signalling platform will be greatly reduced but at least you won't be suffering us low level simpletons.

Attacking peoples education standard because they don't understand something is low but comes as no surprise here.

One would think that people who have confidence in their choices along with the education to explain the technology can handle the negatives without personal attacks and compartments. On the other hand, it’s understandable that people will be a little sensitive after parting with large chunks of cash for products that lack a solid track record.

PS

In the future you might consider using the superior education to write a clear OP.

This is a discussion about EVs available or coming to Thailand.

This is not a discussion about Chinese cars
 

40 minutes ago, Fruit Trader said:

The Onkyo SR-606 rev-04 schematic shows voltage selection.

 

Update I forgot to mention -

There is a chance your receiver contains the dual voltage transformer but has the voltage selector omitted for the US market. An electronics repair shop can check if your transformer is dual voltage but hard linked at 120V.

The Onkyo SR-606 rev-04 schematic shows voltage selection.

1 hour ago, vinny41 said:

it doesn't matter what you call it

"I'm concerned about the increased risk of severe injury and death for all road users from heavier curb weights and increasing size, power, and performance of vehicles on our roads, including electric vehicles," Homendy said in remarks prepared for the group.

https://www.npr.org/2023/01/11/1148483758/ntsb-heavy-electric-vehicles-safety-risks

 

Should EV acceleration be legally limited for safety reasons?

Some of our readers might believe that they would have no problem controlling these cars, but the reality is that the drivers who buy them may not have enough skill and, as such, could easily become a danger to themselves and other road users – even if they stay within the speed limit. YouTube is full of videos of much slower, petrol-driven ‘supercars’ crashing at relatively low speeds, due to the power generated from the line when the lights change.

https://www.whichev.net/2020/04/24/should-ev-acceleration-be-legally-limited-for-safety-reasons/

Insurers will of course take control of this emerging hazard, they move quickly when something new tips the balance sheet.

Personally I will sit on the fence and watch the EV gold rush develop, lots more entertainment to come that's for sure.

17 minutes ago, Chomper Higgot said:

Now I wonder, were the ‘atrocities’ alleged by the Mau Mau fact or propaganda fiction?

Fact.

1 hour ago, baansgr said:

Stopped watching  after 1 minute...says nothing except babble on a load of rubbish

Let me guess, he talks rubbish because your extensive experience and knowledge of Africa does not align with his opinion. Please enlighten us, the topic is - AFRICA -Have you? Would you? 

2 hours ago, Stocky said:

 

What a strange numpty

An introvert who went from a well paid teaching job in Japan to the Jungles of Africa. The demise and subsequent odd behaviour began with rejection of the Japanese work ethic and a series of videos aimed at crushing the dreams of anyone wishing to live and work in Japan. All of his original video content has disappeared.

This guy appeared at my sister-in-laws rent rooms over in Banglamung Nong Prue M1 a few years back. He was living in Japan at the time and looking for a new adventure in Thailand.

A lot of reasons to hate Africa

https://www.youtube.com/watch?v=sbTtvZVxMHY

33 minutes ago, Crossy said:

Gentlemen.

 

That capacitor (C1) makes all the difference, with no load it will charge up to the peak voltage of 33V which is what you will measure.

 

Once you add a load it will discharge during the negative half-cycle, the rate of discharge determined by the load resistance.

 

Which I would expect our so called DIY & Electrical Forum Expert to fully understand and not belittle people with jelly bean nonsense.

5 hours ago, bluejets said:

You forgot to knock off the bottom half of the sine wave, which, when in use, loaded filtered and all the jelly beans removed, will be 1/2 of that.(approx)

Known as half wave rectification...don't believe it...?? look it up...

educate yourself.

I forgot to knock off nothing.

Does not matter how much jelly bean nonsense you apply, my answer and the diagrams result are correct.

There is a reason why the diagram shows 33V at the output and its not a mistake. Educate yourself and all will be revealed.

PS

Its possible the widely used diagram was taken from here

https://rayshobby.net/wordpress/24vac-to-5vdc-conversion

A little more help understanding half wave rectification with and without filter.

https://www.youtube.com/watch?v=N7EUf1GAQuI

On 10/11/2023 at 6:36 AM, OneMoreFarang said:

And if you think that the output of a 24V transformer after the rectification is 24V then think again - or google it.

 

 

The output voltage of 33V given in your diagram is correct (approx) for half wave rectification with filter and no load. 

2 hours ago, MJCM said:

Sorry for my ignorance, but is the difference in V in the cells not solved by Balancing them?

Yes and its a good idea to start the BMS and new cell pack life with a clean slate. Balancing packs of large cells can take some time though.

Who supplied this inverter?

1 minute ago, MJCM said:

Here you go

 

 

 

So that leaves me nowhere.

That is just crazy and you really should take this to Sofar before attempting any more firmware changes. It is possible they have several  versions which changed in production over time.  They should know what version you have from the serial number.

You should send this to Sofar and ask why it differs

18 hours ago, MJCM said:

Edit: Here the manual I have (NO idea why you post a picture of it, but in the mean time I have several versions of it)

I posted a photo of the manual to see if you have the exact match.

18 hours ago, MJCM said:

Have those people checked the Sofar app and enabled Feed-in Power? To check if it actually is NOT exporting (because when AR = Enabled and Power set to 0 then the EXPORT (feed-in) should remain zero

They do not use any apps. Data is collected from the inverter and separate energy meter manually. My brother-in-law commissioned the inverter, he is very thorough when checking to see if the street meter shows any negative metering. The owner prefers not to give PEA any net metering evidence and always checks his meter after switching to no export. 

18 hours ago, MJCM said:

One example where the manual is different is PIN assignments for CT.

In the correct manual pins 15 and 16 are CT, pins 5 and 6 are the meter RS485 which is an alternative to using a CT.
It would be interesting to see how the table in your manual differs from the table below.
 

Anyway, to avoid complicating the issue with more checks I will leave you in the hands of Sofar. 

Small update.

User of same model inverter as yours reports zero export when anti reflux is enabled and its power set to zero (2kw strings set independent). He checks this by viewing the street meter and a bi-direction energy meter on the main feed when solar production is greater than house consumption.

His display reads Reflux Enable when anti reflux is enabled and goes back to Normal if the CT is disconnected or reversed.

There are many variations of firmware inside these inverters often based on the country they were intended for.  Having the incorrect manual in the box and the inability to change country code is a red flag. I hope Sofar have not got crossed wires over your inverter type and sent the wrong firmware.

The proper factory included manual for this range of inverters is shown below.

12 minutes ago, BenStark said:

That is also what I would have thought, but I googled for 30 watt wiring size, and all results were US quotes, claiming 18 AWG was what I needed.v  Some even suggested 16 AWG

 

Here are just 3 results

 

https://www.engineeringtoolbox.com/amps-wire-gauge-d_730.html

 

https://battlebornbatteries.com/battery-cable-size/

 

https://info.waytekwire.com/wire_sizing

 

Google results can make you crazy - look at this one for 18AWG

https://portablepowerguides.com/how-many-amps-can-18-gauge-wire-handle/

1 hour ago, BenStark said:

Now I'm building a PC and have to extend the power wire to my DVD writer, which consumes about 30 Watt at 12 Volt = 2.5A

 

When I search what size of wiring I need, I get as result 1mm.

 

What am I missing here?

You are likely not missing anything and picked up a result that has taken length into consideration.

.5 or .75 multi strand cable will suffice for the short length you require. Most PC power connectors have the shared ground (black) doubled up.

1 minute ago, Crossy said:

I don't think you'll ever achieve exactly zero export, we seem to bumble around 10W either way according to my separate meter (don't trust what the inverter says).

 

There should be a CT calibration setting somewhere so you can tweek what it sees, maybe adjust so you are always importing a tiny amount? 

True and the setting to no export should result in a tiny import of about 10W. The inverter trends on the import side to avoid the meter creeping backwards.

1 hour ago, MJCM said:

Have a look at this graph (it's from yesterday)

One more question just to be sure I am on the right page.

Is this correct?

Before the firmware update you could always stop export completely and the meter would not turn backwards when solar production exceeded house consumption. 

5 minutes ago, MJCM said:

yep ever so slowly, hardly noticeable but yep (sometimes it's a bit faster then slower again)

I have got to be careful what I say here because there are so many firmware variants often country specific.

If you are sure the CT wired correctly  and you have done a complete restart after enabling reflux then best keep to your plan and contact Sofar again