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49 minutes ago, Crossy said:

 

It's on a slow boat to from China.

With so good deal its worth the wait!

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4 minutes ago, Crossy said:

Current thought experiment.

 

 

The 6 panels at the top are installed and working.

The 6 at the bottom should be done and working this week.

 

The additional 28 need some planning (how to support where the columns won't get hit).

 

All good fun.

How many total watt solarpanel when all up?

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5 minutes ago, Crossy said:

 

Not certain yet, we certainly need an inverter upgrade looking possibly at 3 x  Deye SUN-5k-SG05LP1-EU 

 

https://www.lazada.co.th//products/i4978816678-s20977309094.html

 

Plus a major upgrade of the ESS arrangements.

 

Great inverter.

When you expect to get your battery deal delivered?

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4 minutes ago, Crossy said:

These really need to be on the roof, but no space, yet!

 

Thats allot of solar capacity !!! You will built some kind of rack for it? Whats your plans for inverter for this?

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21 hours ago, Crossy said:

 

We have our UK grandkids (3F, 1M all teens) here for 3 weeks (they go home on Thursday). Our normal 30kWh per day total consumption is approaching 90kWh per day!

 

We love them very much, but with their energy and food consumption we'll be on bread and water for the next couple of months.

Until this month i been very confident on my solar power capacity, but with this heat, location of the sun (Im getting max 6000kwh now, 5-6 months ago 7000kwh was max) and school off so kids AC running in daytime also Im might a bit in the short side.

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1 hour ago, Crossy said:

CrossyPowerCentral has expanded somewhat with the addition of 3 more 340W panels taking us to 13.1kWp on the car-port.

 

 

Our motley collection of panels demonstrates just how widely the dimensions of panels vary. Except for the baby 100W panel on the right (which powers some of our floodlights) all those panels are 300-340W. This is one of the disadvantages of building a "bitsa" system.

 

Energy storage has also expanded, these are "Archibald" XDLP48-100 (51.2V 100Ah) LiFePO4 battery packs. Sadly, they've been in storage for at least 3 years and I'm not convinced they used new cells even then. They all measure at about 60Ah from full charge to BMS cut-off, they may improve as they balance with usage cycles.

 

 

I got these packs and a stack of other solar stuff which I'm still inventorying from the estate of a friend who sadly died last year.

 

There are inverters and a stack of panels that I'll need to clear so watch the forum for stuff becoming available.

 

Of course, with all these upgrades we are hitting the limits of our current inverters, so replacements are also on the cards.

 

EDIT Of course, life being life, this collection of stuff came up a week after I'd ordered two new 280Ah 48V packs from Shenzhen Luyuan Technology Co., Ltd.

 

All in USD3,774 for two including DDP shipping to Thailand. Saved a few hundred $$ by ordering them as kits rather than fully assembled. Amy Wan and Shenzhen Luyuan come highly recommended on other solar power forums.

 

https://www.alibaba.com/product-detail/14KW-48V-51-2V-280AH-Pre_1600894719244.html

 

 

 

That look to be a good deal on a good solution. Looks great!!!

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25 minutes ago, Muhendis said:

I guess this is panel to panel connections.

Warranty?

Yes it was panel to panel connections.

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1 hour ago, Crossy said:

 

Yeah, that was the actual failure, but what triggered it, bad crimp, damp, just not quite plugged?

Not easy to say but could be it happened around time we got some cleaning done with hose but I dont know whats the chance for any water to have made the issue. Im quite sure it was not matter of not plugged. Both connectors were original connectors on the solar panels so I would expect they to be well crimped..but I guess fails happens.

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Generated 31+kw/h today. Its long time since I was able to get this level in a day !!!

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6 minutes ago, Crossy said:

Any indication what cause the failure?

 

I guess its what you mention last day: bad connection between the 2 panels. The 2 connectors was melted and no other damages to see.

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Yesterday afternoon I pulled down the one panel and replaced one connector on each on the two pannels and mounted it all back and connected the wires. This morning i first tested the voltage on the breaker before open it to power the inverter. Now i see power is same or better than the other side of the roof so the fix look to be successfully as for now.

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5 minutes ago, Crossy said:

 

Possibly a bad connection/connector been fizzing for a while and finally failed.

Now I feel it strange i not discovered it before, maybe if it was in front side roof i have seen it before. The good part of this is that I found the reason why I am on low power and it should be fixable.

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1 minute ago, Crossy said:

Local wildlife maybe??

 

Or just crappy MC-4 connectors.

 

Yes I was thinking same. I will pull down the 2 affected panels and replace connectors and test them. Hopefully panels still ok. When close up photo i see black on the steel so look like some electrical shock pulled the connector apart and broke it.

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As mention in last post last weeks i was starting to get lower watt level than what im used to. First i thought it was the moment of the sun..then last day i was sure it was quite sure it was a matter of cleaning. But after cleaning still same. Than this morning we found out them my one side of panels have a broken connector so that side is 50% with only 7 of the 14 active. From photo look like the connector is damages and we see some black on the steel frame on the roof. Any idea how this could have happen?

Now i make a plan to take down the one panel who block the access to the panel with issue then replace the connectors and test the panel with watt/amp meter.

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So at this time in getting 4000 Watt level as max, the he time I installed my max level was 7000 watt. This time of the year my one roof side perform better because of the sun position and im just able to get needed power per day so I might after a years experience with all seasons should consider some more panels. I do plan a cleaning pf panels very soon but lets see how much that will improve. I noticed i produce about same in light cloudy weather as in full sunny weather.

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3 hours ago, Crossy said:

Happy New Year everyone.

 

The numbers for December, another 4,600Baht that PEA didn't get

 

 

I also did a month-by month plot comparing 2023 with 2022.

Overall total pretty similar but some interesting variations (note that the vertical scale starts at 600 kWh so variations are exaggerated).

 

Nice Numbers. Happy New Year too.

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My vote goes to location B. I have do a DIY offgrid setup with 30kwh batteries and 9-10kw capacity for 300K. If you do 3 x inverters in parallel then x2 and for example 2 x 30kwh batteries that setup with a backup generator you should be good. Btw I saw in another tread prices on SPF5000ES very good in Thailand now, they great to parallel setup.

Regards

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3 hours ago, Muhendis said:

I think I mentioned that my panels are well past their prime and three are now flawed so their output is suspect. 

Yet I also still get power back into batteries by lunchtime.

That would probably take a lot longer and indeed used to until I changed the batteries the old ones being knackered.

The new batteries are, as I mentioned, lead carbon and one if their attributes is very good charge acceptance which means they will take everything I can give them even though what I give them could be a lot better.

Cleaning the panels looks good but the improvements in performance are really only noticeable before and after midday when the sun is anything but perpendicular to the panels.

That looks a very good bit of kit. Do you also have an oblong bucket? 

Yes I have one of those large oval black ones used when building so it will be fine for this. I was not sold as a set but i picked the items i wanted. I payed just over 1kthb delivered.

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That was a good price on the Growatt Inverter you got. Where you buy? Good luck with the project.

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13 minutes ago, Muhendis said:

That may be true, but it is also true that some brands are grossly over engineered and could be a whole lot less costly yet still perform just as well. 

There are plenty of less costly inverters, charge controllers and BMS's which perform just as well as the higher priced items, but I'm sure you know that already. 

There are also plenty of thieves out there who conceal their bad products behind false advertising claims.

 

+1 Yes I agree on all you mention.

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