Thaifish

For those crunching numbers attached is my diary readout from the old meter 7 days now in production.. As many posters are saying.... To good to be true with output.... A big shortfall with this system is the poor readout display. Enviouse of other posters display....Maybe with smart meter when it turns up I might get a more accurate info with display??  

Day 7and my updates... First up I really did not want to post my power bill but I have had heaps of questions about previous consumption. The bill is not accurate consumption as I returned to Thailand January with lock out fellang since March last year.. Long story.. I do know from memory from my previous 8 years living here that I would expect this time of year for the Bin to be in the high 4,000bht range... Maybe 4,600bht and it will build up over the wet season to maybe 5,400bht.. Each year it builds up.. The consumption shown in the last 6 months is low for reasons yours truly has not been on the ground... I wish to show a full picture here of my installation. The ATM has been broken until I got back... On the bonus side the Durian is fruiting for the first time..4 years... with all the water from irrigation.. 

25 minutes ago, BritManToo said:

According to the calculator optimum is South 40deg winter,  North 8deg summer.

Ur quick with reply.....have a look at above calcs just posted same time as you I am happy if you correct me... I must give away that I am a retired ships Captain and make mistakes. Celestial nav was one of my studies... Solar and electronics was not,,  8 deg North is Summer Soltice.. Optimum 86Deg South April through to Aug.... then 63 deg South Feb through to Oct.... These are optimum average elevation for each 6 months....75 South is mean elevation between the both over the year.  My calcs are in the drawings... 

Some early days workings... Originally planning to do self installation myself.. 

36 minutes ago, Thaifish said:

21kw x magic number 1.96 = 96bht

OOOps.... 21 x magic number 1.96bht = 41.16bht profit

On 2/24/2021 at 9:44 AM, mistral53 said:

60 Kwh production leaves me green with envy - and I am not convinced, as this equates to 2.61 Kwh per panel. That is more than even the most optimistic installer will mention during his sales pitch. My best was 2 Kwh per panel, but I have shading problems, our neighbor, without shading, has a best of 2.1 Kwh. Admittedly, roof/panel angles and orientation will make a significant difference, and if it is confirmed, it will give me pause.

 

Mistral please jump on board with your input. Especially since you have experience with Huawai inverters. You may see in my photos the roof is orientated East/West. I basically have sun on the roof 100% of the day even though surrounded by bush. The pitch on the roof is 23Deg South.... The optimum is 27Deg South for my Latitude.... I have hand workings/calculations which I can post when I started this project....originally a 5kw system installed by myself...angles of sun...shadows...etc... I even went as far as calculating moving the panels orientation each 6 months for optimum power output...ended up bighting the bullet and got what I have with a fixed orientation even though I did ask the Contractors if it was possible to change angles... Yes an overkill doing it in the tropics. Sometimes I think to much....

Day 6 and 1/2 the house empty as I was invited to go shopping with them in Burriram.. Nice to feel wanted.. cost me a sheeet load though...! Mostly sunny morning bar smoke from fires and a high thin cloud which built through the day.  Bahn should have used <deleted> all power but still managed to consume about 35kw for the day going by the bar graph below. I'm not 100% confident with the display but I think it could be accurate. The meter ran backwards 21kw which concurs with the bar graph. Production was 53Kw. The line graph I have given up trying to understand. The bar graph income no idea what settings are but 21kw x magic number 1.96 = 96bht profit for the day!! Did I mention I went shopping today cost sheet loads!!

The second screen shot taken yesterday shows the Wattage drop flowing through inverters which was a question asked earlier on in this thread. 7.82W before inverter down to 7.648W after = .172W drop.  

The meter is feeding 2 bahns. 8 people, 6 a/c, 2 fridges (was 3), washing machine every day (kids clothes), irrigation pump runs all day, garden hose pump runs just about all day, well pump to fill garden tank + house shower supply etc. Rice cooker on 24/7 + Hot water for coffee 24/7. I run an 8000w hot water machine for my shower and fill jacuzzi, Puddah lights on all night (pet hate of mine). Yep consumption is around 1196Kw per month >>>4.18bht p/kw>>>5000bht. Last month we only consumed 640KW as nobody was using A/C though. Come the wet season the irrigation and garden pumps stop but the A/C's get switched on. We had to run a second phase from the grid meter as we burnt the supply cable out. So we have 2 phases coming into the bahn.

So many posts and not enough time...sorry for not getting back... photos have taken sheet loads of time to download..  Before I go tonight even though pisssed of with Huawai display some things do add up. The yield I believe is accurate in the attachment below since start up..... My meter is turning backwards still. I changed the settings to stop feeding back into the grid only to find that it was still doing it....Worried about a holiday in the Bangkok Hilton... I questioned the boss lady only to find out that the installers are also watching the output just like me...Apparently they switched it back on to feed into the grid remotely from HQ Bkk...!! Yep the mind boggles!! My next question was how do you explain the meter reading being less than last reading?.. Reply from hammock as she swings....don't worry we order Smart Meter...Don't worry.... TiT...

Putting copper earth into ground.. When the going got tuff with the sledge hammer they used a drill with the hammer setting... great trick...never seen before..works...

These guys smart used hooks to bring wires into place in tight corners ... Wiring internal roof also had conduit covering. Rats get hungry up here..

On a side note.. You might notice in photo also another PV. I have 3 of them on roof 40W x 12v. These are powering 12v car radiator fans bought from wreckers 500bht extracting hot air from roof. Have not had a rat problem in roof since installed as a bonus. 3 years working and have only replaced 1. Tin roof is insulated and also have insulation batts in ceiling. Veranda around house stops sun hitting walls.. Initial design by me.. 

On 2/22/2021 at 2:14 PM, Crossy said:

Did you join the "My Solar Roof" scheme which is where the feed-in tariff is available (loads of paperwork and a Contract involved)

Crossy I am double posting this as you will be aware. This thread has helped me big time. My new thread about my 10kw system 337,500bht fully installed is here.

 My Issan 10kw on grid solar project fully installed by contractors 337,500bht - Alternative/Renewable Energy Forum - Thailand Visa Forum by Thai Visa

On a big note today my Terak informed me about PEA (Nang Rong) purchasing excess solar at 1.96Bht per K/w. The paperwork and inspections etc etc will follow on my thread.. So far easy maybe because of contractor contacts with PEA.?

My readout...

4 hours ago, Opossum said:

Hi

 

do you sell any energy to PEA or is your system feeding energy back to the grid? If no, did, you have to do any paperwork for PEA?

 

regards

My installation is only 4 days old and is feeding about 13Kw into the grid (PEA) each day. I have an old meter which will be replaced with a smart meter soon I hope. I am doing everything legit...cough cough.. PEA is buying 1Kw for 1.96Bht.. The paperwork yet involved I do not know but my Terak after visiting them about it today said easy. If you are not sending power back to the grid then PEA does not have to be informed.. You would obviously want to make sure that the system is not going to electrocute a worker somewhere down the line if you connect to main grid supply..

I have 2 Huawai inverters 5000kw each. SUN2000 model