Fruit Trader
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INVT on Grid inverter problem - restarting
Fruit Trader replied to eddysacc's topic in Alternative/Renewable Energy Forum
There is something very wrong if an inverter produces beyond demand to the point where it faults. If the max grid voltage parameter is being exceeded then that's another story which really should be looked at. Most inverters are certified with country code parameters which are sometimes too narrow for Thailand's grid. -
INVT on Grid inverter problem - restarting
Fruit Trader replied to eddysacc's topic in Alternative/Renewable Energy Forum
The inverter has no idea that there is a potential 3500 watts not being consumed. It is only interested in the real time demand and any limits imposed by settings. A de-rated inverter will happily produce a tiny fraction of what the attached solar array is capable of. If healthy, the only real problem for an inverter is over/under voltages at either end of its process or excess temperature generated around the switching electronics. Note. I did not grab this information from the internet black hole, it comes from studying the disassembled code of several on grid solar inverters made by Chinese enthusiasts. -
I think you already know my argument is against those who choose to use the word free without being specific. If ROI is more complex than a simple price per unit calculation then it's important to explain how this will speed up payback. Best to keep it simple on forums where not everyone wants to get involved with costing methods.
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Your personal arrangement, planning, E-bike, ICEV, bla bla bla is totally irrelevant to my argument no matter how you apply the word FREE. Read and digest it slowly, you will get there in the end. I have placed the important part in bold to make it a little easier for you to catch on. One cannot claim the power is free (no cost) until the value of electricity produced exceeds the cost of solar equipment.
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It will become free from cost when initial investment has been recovered. Solar power is a great way to charge EV's but one cannot claim the power is free (no cost) until the value of electricity produced exceeds the cost of solar equipment. If a solar system produces more energy than required and surplus energy is used to charge an EV, the same rule applies. Free can mean many things; so it's best to be more specific unless of course one is purposely attempting to introduce ambiguity just in case someone questions the claim.
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INVT on Grid inverter problem - restarting
Fruit Trader replied to eddysacc's topic in Alternative/Renewable Energy Forum
If an inverter restarts frequently the first port of call is the fault log. If the logs show no errors then begin looking elsewhere. In theory software should not make a restart during normal operation without logging the reason but there's always a possibility you have a condition that's not been accounted for or might even be one that's resetting the hardware without the software ever knowing. The high temperatures you speak of are of interest to me because I have made some mods to my inverters and others that use passive cooling. These mods help during high load and high ambient temperature conditions. -
Electric Vehicles in Thailand
Fruit Trader replied to Bandersnatch's topic in Thailand Motor Discussion
It's not so much of a dogs breakfast if viewed from below in good light and I have always liked Ford performance blue. Definitely the budget fix for a midlife crisis. -
INVT on Grid inverter problem - restarting
Fruit Trader replied to eddysacc's topic in Alternative/Renewable Energy Forum
What does the fault history show? -
I wonder how much crap made it through those holes to the evaporator. If it's not chewed by a rodent there's something very wrong with that filter.
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Thailand shifts gears with online vehicle registration
Fruit Trader replied to snoop1130's topic in Thailand News
The vehicle braking system applies load on the rotating roller motors which is measured and displayed to the operator. I believe in some countries heavy goods vehicles include load or down force applied during these tests. Not sure why this is done, possibly to test suspension or vehicle load sensors during tests. -
Short small diameter wires with 16A fuse?
Fruit Trader replied to OneMoreFarang's topic in The Electrical Forum
Mains supply isolation requirement for home automation switching devices is mostly decided by the the relay contacts state. If the contacts are dry (volt free) then good mains isolation at the PCB is desirable. Example below Shelly with dry contact isolation. The OP has model without dry contacts. -
Short small diameter wires with 16A fuse?
Fruit Trader replied to OneMoreFarang's topic in The Electrical Forum
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Short small diameter wires with 16A fuse?
Fruit Trader replied to OneMoreFarang's topic in The Electrical Forum
Shelly device with powered electronics only, no relay load. All brand name devices like Shelly and Sonoff have some kind of internal protection at the electronics supply circuit. Inline fuse, fuseable resistor or similar. As already mentioned, very short lengths of 1mm cable will easily carry your breaker trip current although an electrician following his code would likely shout foul. -
One possible cause of premature failure in LED pool lights. A while back my brother-in-law returned home with some failed LED pool lights from a local pool. Thinking about making repairs we dismantled the lights to find that the electronics sealed inside a clear compound has suffered corrosion and burning. Further investigation revealed water had found its way inside of the sealed area down the supply cable. We later made a visit to the installation and found all poolside connections to the lights submersed in water because of pools flood over design. This service bulletin from Hayward Pool Products points out this problem and the need to seal cable ends at the supply junction. https://deltatriluhur.com/wp-content/uploads/2018/09/hayward_underwaterlight_installation_guideline.pdf
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Cable brands - big differences?
Fruit Trader replied to OneMoreFarang's topic in The Electrical Forum
Your statement is pointless without defining accuracy required. I have just repeated the area measurement method made by @Muhendis (the method you previously questioned) on a 10mm2 copper cable using digital vernier caliper which repeated within .03mm. I repeated the test using a 0-25mm micrometer and obtained the same result but the wider contact area of the micrometer slightly improved repeatability. -
Cable brands - big differences?
Fruit Trader replied to OneMoreFarang's topic in The Electrical Forum
XLPE is an insulation type. The average accuracy of digital vernier calipers is around .02mm