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Everything posted by Muhendis
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If Thailand refused you, where would you live? And why?
Muhendis replied to sidjameson's topic in ASEAN NOW Community Pub
Who said it's not electric? Apparently there's a fair bit of sunshine most of the year so solar power has become extremely popular in Australia. A nice big mobile home with plenty of solar panels on the roof and away you go. -
And you thought your Electric Bill was high ?
Muhendis replied to Social Media's topic in The Electrical Forum
Err. Isn't the main power used at night? So now tell us how many batteries are used for night time running. -
That's an interesting idea. Currently aviation (non-military) is using between 52 - 95 Billion Gallons of aviation fuel per year. Reason for the spread of the numbers is due to pre covid flights and during covid flights. A beefed up version of this machine is anticipated to produce 9 million gallons per year so 10.5 machines should do it. A bit disappointing to note this comes from a Camms Comic though.
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Nothing to do with stamp shops in Pattaya but did you know there is a stamp museum in Bangkok where you can also buy stamps. I've been there and it's a fantastic place for stamp collectors. https://www.tourismthailand.org/Attraction/thai-philatelic-museum
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Two out of three is not so bad. https://indiarugby.com/
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Which cities in Isaan are the most English friendly?
Muhendis replied to smallchungus's topic in Isaan
What a load of tosh. My wife loves me to objectify her regularly. -
Which cities in Isaan are the most English friendly?
Muhendis replied to smallchungus's topic in Isaan
Naah. It's heaven on earth if you like that sort of thing. -
New Police Hairstyle Regulations on the Horizon
Muhendis replied to webfact's topic in Thailand News
Fine. What about the men? -
Large motors and powertools on hybrid inverter
Muhendis replied to Pink7's topic in Alternative/Renewable Energy Forum
I have my ATS set as follows. N Primary = Solar inverter R Backup = Grid Reasoning is that my house is completely solar powered but if batteries are too low at night then inverter will switch off 'till batteries are good again and ATS will switch over to GEC. Once the batteries are back up to something like full then the ATS will switch back to inverter output. I should point out that this condition has never happened in the 13 years I have been solarised. The ATS gets tested every time I grind my rice. I simply switch off/isolate the inverter output and over goes the ATS to grid supply. To revert to normal solar power I simply switch on/un-isolate the inverter. -
Large motors and powertools on hybrid inverter
Muhendis replied to Pink7's topic in Alternative/Renewable Energy Forum
That's the safest way. I also have a rice mill but only a single phase 2.2 kW motor. That's 10 amps running. My 8kW inverter is OK with that but, as has been said, startup current will see a short lived 50A or more burst which is 11kW or more. That's ok if the motor starts off load. The inverter will handle it. Trouble is, there have been a few occasions when things go wrong and the motor stalls. In those conditions the current is limited only by the resistance of the motor winding and that current is really high. I always switch over on my ATS to GEC (Greedy Electric Company) when milling. -
Easy Peasy. Check out combiner boxes. These are boxes with fused input terminals for strings of panels which need to be paralleled. The outputs from the terminals are diode isolated from each other into a common connection. There will be a DC circuit breaker and a surge suppressor at the common output which then goes out of the box to your charge controller or inverter solar input. Just make sure the Voc and charge controller/inverter input power (less derating factor) is not exceeded.
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Growatt SPF5000ES Offgrid 9kw DIY Solar Project
Muhendis replied to Pink7's topic in Alternative/Renewable Energy Forum
This is true. Before putting your battery pack to work you really should charge them first. This ensures all cells are at the same level to start with. After that they can be assembled into their working configuration. This is all well and good for a DIY pack but what about the preassembled units which are plug-n-play? Hopefully this was done before they were assembled but I doubt it. The problem is that delivering a fully charged unit is not good so the batteries are supposed to be delivered half charged. As has been mentioned above. Balancing needs to be done prior to putting the battery to use but first it needs to be in a fully charged state. First charge the pack second balance it. Third give the pack a final charge because balancing could possibly reduce the charge to less than 100%. Now the pack is ready for work. However, cell balance needs to be regularly monitored and balanced. Ideally the battery pack should be taken out of service for balancing so that charge and discharge voltages do not affect the balancing act. Please be aware that balancing is very important. If one cell in a 48v pack is fully charged but all the rest are still at around 80% or so. There is a danger that the already full cell will become overcharged as the charger tries to fill up the pack as a whole. With a good BMS and charger control I would imagine this situation is protected against in the preassembled packs. -
Solar Recommendation for Blackouts
Muhendis replied to parallaxtech's topic in Koh Samui, Koh Phangan, Koh Tao
His bill isn't much because power spends much time being not there also return on investment is probably low down the list of importance for the same reason. -
Solar Recommendation for Blackouts
Muhendis replied to parallaxtech's topic in Koh Samui, Koh Phangan, Koh Tao
I can't recommend a solar company being as how I'm a long way from Kho Samui, but I am curious to know why you want to go solar. What is your reason? -
Change visa stamps to new passport
Muhendis replied to jimn's topic in Thai Visas, Residency, and Work Permits
Which immigration office did you use? Buriram immigration office didn't require any forms or photo copies and did it for free when payment was discussed. As I recall think I was asked to sign something at the time. Perhaps they did their own copies. With regards to the letter, mine came with my (British) passport as a matter of course last January, and by the way, the UK embassy doesn't do passports. That's done by VFS at Trendy Tower in Bangkok. It seems we have variations on the theme depending on which immigration office is used. -
Change visa stamps to new passport
Muhendis replied to jimn's topic in Thai Visas, Residency, and Work Permits
Just "roll up" with the old and new passports. All the information required by immigration is in the old passport. You should also have a letter/note from your passport provider asking for stamps to be transfered but I don't think immigration ever bother to look at it. -
Are these the highest solar panels in the world?
Muhendis replied to Muhendis's topic in Alternative/Renewable Energy Forum
That's definitely the highest solar panels. I am deliberately discounting space exploration and satellites on the basis that they are external to "the world" in which we live in. -
Growatt SPF5000ES Offgrid 9kw DIY Solar Project
Muhendis replied to Pink7's topic in Alternative/Renewable Energy Forum
Free at the point of use and aware of the limitations. Yes when using PEA we tend to do what we like with it without a thought for it's seemingly bottomless pit of available power. As soon as we start producing our own electricity, we become very aware of our power usage and tend to keep a more critical eye on things switched on.. -
Growatt SPF5000ES Offgrid 9kw DIY Solar Project
Muhendis replied to Pink7's topic in Alternative/Renewable Energy Forum
Excuse me pointing out this slight discrepancy, but I think when you write kvh (kilo volt hours) you really mean kwh (kilo watt hours). -
How about a solar car port on a budget?
Muhendis replied to Crossy's topic in Alternative/Renewable Energy Forum
Or a simple inverter + ESS +ATS and forget about export. PEA then becomes your backup if ever needed.