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How about a solar car port on a budget?

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On 8/18/2025 at 12:53 PM, Crossy said:

 

The first switch vanished into the Lazada delivery system (the giveaway is that it went from being with Lex to being "in line haul"), Cancel button was still active so I gave it a try.

Error, declined!!!

One does hope that once the system works out that it's lost then I'll get my 70Baht refund.

 

I ordered a second switch on Sunday as soon as it became apparent that the first was lost, it arrived today.

 

It actually took longer to install the switch than it did to do the job! :whistling:

 

 

 

Update. 

 

Lazada finally decided that my item was lost and refunded.

 

As Tommy Cooper once said "It's not the principle, it's the money!" :whistling:

"I don't want to know why you can't. I want to know how you can!"

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  • Warning - solar panels are 'kin heavy when you have to lift them onto the roof ????   Finally, the 4 panels are in place.     Panels are fixed using plates and long screw

  • Something like this:-  

  • Imagine how much power would be produced if every roof top in Thailand was covered in solar panels..they would (probably) not have to import any electric from neighbouring countries and save billions

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Err.

Which one is you?

  • 2 weeks later...
  • Author

After several dull days and family visiting over the weekend the sun finally came out this morning: -

image.jpeg.1b4bf3fea687854c49ce14737abcb3aa.jpeg

It's 2.30PM and the batteries are just about full, we shoved 50.5kWh into them this morning.

 

Now, about that 400A DC breaker (already upgraded along with the battery cables from 250A) ...

 

"I don't want to know why you can't. I want to know how you can!"

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The village-head just called Madam, village power will be off on Friday 8AM-5PM, I think we are getting a new, bigger, transformer.

 

I doubt we will notice :whistling:

 

"I don't want to know why you can't. I want to know how you can!"

  • 3 weeks later...
On 9/9/2025 at 3:47 PM, Crossy said:

 I think we are getting a new, bigger, transformer.

 

I doubt we will notice

Ha ha, yes, being off grid the only thing you will notice is the louder explosion once that transformer meets its maker. 

 

They go off with a bang 

17 minutes ago, SAFETY FIRST said:

Ha ha, yes, being off grid the only thing you will notice is the louder explosion once that transformer meets its maker. 

 

They go off with a bang 

I once asked a friend about this girl ...talking about BANG ...he said 'she goes off like a 21 gun salute'.

14 minutes ago, carlyai said:

I once asked a friend about this girl ...talking about BANG ...he said 'she goes off like a 21 gun salute'.

Ha ha, in Thailand they would say.... 'she goes off like a 1000amp transformer'. 

  • Author

Numbers for September 2025.

 

Nothing exciting apart from the 7,900Baht that I've not paid to PEA 🙂 

 

 

image.png.4f9d8dbb61e661c1df6aa1d54c5e0422.png

"I don't want to know why you can't. I want to know how you can!"

  • 5 weeks later...

No separate roof for carport so using the house roof.  After 28 months no roof leaks.

3 phase10Kw AlphaESS hybrid inverter with 24KwH of AlphaESSbatteries.  Backup power with phase protection so if any phase has interruption we disconnect from grid and run on batteries.  Initially if only one phase had problems the inverter would not switch to battery only.

 

Screen Shot 2025-11-01 at 2.26.39 PM.png

I hear it is a top of the line setup.

 

Did you setup the inverter for load shedding priority, like charge the battery and drop off EV charging or pool equipment?

 

I've got solar contractors coming this week looking at installing the Alpha hybrid inverter and And Alpha ESS.

 

Can you tell us the price of your installation?

 

I put away B450000 for my solar system, but the contractor thinks the 3 phase Alpha system starts at B500000.

Thanks

 

 

1 hour ago, carlyai said:

Did you setup the inverter for load shedding priority, like charge the battery and drop off EV charging or pool equipment?

I don't have any options to control what circuits in our house are supplied battery or solar power.  We do have a separate box of circuit breakers which are supplied battery power when there is a grid problem.  Those circuit breakers were moved to it from our main box.  All our A/C units have individual breakers mounted on the outside walls next to the compressor it protects so none of them are powered by battery.

 

There are two residences that share the solar and grid connection.  The grid connection terminus is co-located with the inverter.  The second house has its own primary breaker box and also a separate box for its circuits that have battery backup during grid failure.  The houses are connected via a shared hallway so connections are hidden and protected under a continuous roof.

  • Author

I was fiddling with my settings last evening (I know, if it's not fooked don't fix it) and an important check-box got un-checked.

 

The net result was that we used grid (red line) last night not batteries, that's 24kWh I'll have to pay for ... 😞

 

image.png.2ebbdf7253643b650f920ac13836ce21.png

 

... unless we get a couple of nice sunny days so I can spin our antique meter backwards for a while :whistling:

 

 

"I don't want to know why you can't. I want to know how you can!"

5 minutes ago, gamb00ler said:

I don't have any options to control what circuits in our house are supplied battery or solar power.  We do have a separate box of circuit breakers which are supplied battery power when there is a grid problem.  Those circuit breakers were moved to it from our main box.  All our A/C units have individual breakers mounted on the outside walls next to the compressor it protects so none of them are powered by battery.

 

There are two residences that share the solar and grid connection.  The grid connection terminus is co-located with the inverter.  The second house has its own primary breaker box and also a separate box for its circuits that have battery backup during grid failure.  The houses are connected via a shared hallway so connections are hidden and protected under a continuous roof.

Was the price over B500000?

  • 5 weeks later...
  • Author

Numbers for November.

 

That's 6,227 Baht I'm not paying to PEA instead of the 33.63 Baht we actually paid them of which 24.62 Baht was the service charge! 

 

My son brought us a proper 3kW kettle from the UK (where you can still buy them despite the green lobby), tea is now made in record time!!

 

Luckily we can run the kettle, washer, dryer and Madam's Tefal super steam ironing thingy without the solar flinching.

 

image.png.41fbfb62ef840e025ff2e0e5704ba712.png

"I don't want to know why you can't. I want to know how you can!"

50 minutes ago, Crossy said:

Numbers for November.

 

That's 6,227 Baht I'm not paying to PEA instead of the 33.63 Baht we actually paid them of which 24.62 Baht was the service charge! 

 

My son brought us a proper 3kW kettle from the UK (where you can still buy them despite the green lobby), tea is now made in record time!!

 

Luckily we can run the kettle, washer, dryer and Madam's Tefal super steam ironing thingy without the solar flinching.

 

image.png.41fbfb62ef840e025ff2e0e5704ba712.png

Would you be running all those appliances in sunshine hours or in battery darkness?

  • Author

Madam is well trained so the big stuff gets run during the day, so it's directly from the sunshine.

 

But even without the sun we are good for 20kW from the batteries for a few hours at least (90kWh of battery). In reality we never get anywhere near 20kW even with our Thai grand-daughter in her volcanic shower and arctic aircon.

 

At night it's basically A/C, shower heaters and entertainment kit.

 

 

"I don't want to know why you can't. I want to know how you can!"

34 minutes ago, Crossy said:

Madam is well trained so the big stuff gets run during the day, so it's directly from the sunshine.

 

But even without the sun we are good for 20kW from the batteries for a few hours at least (90kWh of battery). In reality we never get anywhere near 20kW even with our Thai grand-daughter in her volcanic shower and arctic aircon.

 

At night it's basically A/C, shower heaters and entertainment kit.

 

 

I thought you had the shower heaters on PEA?

Was that before your last upgrade.

 

  • Author
1 hour ago, carlyai said:

I thought you had the shower heaters on PEA?

Was that before your last upgrade.

 

Yeah, with the latest increase in panels, inverters and batteries we are now effectively off-grid for everything, just keeping the grid for backup.

 

"I don't want to know why you can't. I want to know how you can!"

11 minutes ago, Crossy said:

 

Yeah, with the latest increase in panels, inverters and batteries we are now effectively off-grid for everything, just keeping the grid for backup.

 

Same here, as original install, had the 2 water heaters on the grid, which I didn't realize at the time.   When 2nd ESS was added, had those put on the solar as well.   

 

Only thing on the grid, is the BEV wall charging cable (7.4kwh), and also keep the grid as back up, since only having 1 inverter.

 

When one of the ESS had an oops, and sent away for replacement, noticed it wasn't needed at all, for the too many months it took to be replaced.  Just the 2 of us, so overnight use is less than 7kWh usually, as one 10kWh ESS is enough.

11 minutes ago, Crossy said:

 

Yeah, with the latest increase in panels, inverters and batteries we are now effectively off-grid for everything, just keeping the grid for backup.

 

 

Question.

 

I know you're knowledgeable to have done all the installation yourself.

If one had to rely on an installation company, would it still be worth the investment?

27 minutes ago, CallumWK said:

 

Question.

 

I know you're knowledgeable to have done all the installation yourself.

If one had to rely on an installation company, would it still be worth the investment?

 

I can answer for us, and that's a yes, depending on components & cost.  Without the extra cost of the unneeded ESS, we'll be break even ROI sometime early next year, less than 4 yrs owning, and our system cost a lot more 3 yrs ago, than it would today, as ESS / battery prices have been halved.

 

The BEVs are a big part of that ROI, as petrol cost would match the monthly PEA cost, if not having solar.  If not having hybrid inverter & ESS, then return may be even quicker, depending on overnight use, and ours is mostly AC abuse. 

 

Most don't abuse the AC use as we do, and ESS may not even be worth having.   MEA/PEA overnight cost, vs return on 50-60k baht ESS, may take some time for ROI.

 

It would take about 4 yrs, for us to get a ROI, for the cost of a 50k baht ESS, @ 7kWh a day @ 5 baht / kWh, for our overnight use.  That only 2 people using 1 AC all night long, along with 55" TV (6 hrs) and couple laptops & frigs running..

 

Of course if prone to power drop outs, or fluctuating current, then having power 24/7, along with steady current / voltage, saving your electronics, is an added plus.

 

Really can't think of a scenario, where having solar wouldn't pay for itself, unless rarely home during daytime hours.

  • Author
50 minutes ago, CallumWK said:

I know you're knowledgeable to have done all the installation yourself.

If one had to rely on an installation company, would it still be worth the investment?

 

Obviously if one uses an installer the up front costs are much greater.

 

That said you are still creating "free" energy only your break-even point will be longer.

 

 It's not rocket science to DIY, particularly if you can do a ground or car-port setup so no worries about working at height or roof leaks.

"I don't want to know why you can't. I want to know how you can!"

1 hour ago, Crossy said:

 

Yeah, with the latest increase in panels, inverters and batteries we are now effectively off-grid for everything, just keeping the grid for backup.

 

Are you saying that you can probably get by with 20kWh battery?

  • Author
5 minutes ago, carlyai said:

Are you saying that you can probably get by with 20kWh battery?

 

We use about 30kWh (double that when UK family are here) from the batteries each night so no way 20kWh of storage would work for us. Batteries are usually full before mid-day. 

 

But we don't exactly do the economy thing, we have loads of energy available so we might as well use it as it costs no more.

 

Also, we don't have a BEV yet, that depends upon a couple of big projects that are coming up.

 

"I don't want to know why you can't. I want to know how you can!"

53 minutes ago, carlyai said:

Are you saying that you can probably get by with 20kWh battery?

 

4 hours ago, Crossy said:

(90kWh of battery)

Crossy is saying that he is using 22% DoD of his ESS which will be good for many years before they are faded to an irresponsibly low level.

It is sensible to restrict nightly use to around 30% to give you a goodly life expectancy of your batteries.

For example, I use lead carbons which, at 30% DoD would yield a life expectancy of about 10 years.

I suspect Crossy's batteries would be good for somewhere in the region of  15 years or more although I seem to recall some of the batteries were once involved in playing golf and therefore not quite so full when installed.

  • Author

The golf-cart cells have been relegated to working our 12V floodlights, they are down to less than 50% of rated capacity but they do still work although one actually split its hard plastic case!

 

 

"I don't want to know why you can't. I want to know how you can!"

  • 5 weeks later...
  • Author

Happy New Year to everyone!!

Some numbers for December.

{F71FD791-9EBA-479A-9524-3C545C9E430E}.png

In 2025 our solar generated 22,032kWh which according to the PEA calculator would have cost 112,679 Baht if used from the grid! We don't actually use all that we could generate (no EV yet) and we don't have an export agreement so we are potentially "throwing away money".

People still tell me solar isn't worth it, mainly due to the large initial outlay. But kit prices are at an all time low now, there's never been a better time to start using fusion energy!

We actually used 373kWh from the grid at a cost of 1,701 Baht. In reality the bills add up to more than that due to the 25Baht standing charge, but retaining the grid is cheap insurance against a solar disaster.

{26310849-E576-4458-9513-D87865353F67}.png

"I don't want to know why you can't. I want to know how you can!"

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