As the el chepo "not so pure sine wave" inverter (12VDc to 230AC) do not run my water-pump i need a better inverter.
Any shops in udon that have pure sine wave inverters in stock?, 500 W should be ok.
Pure sine wave inverters?
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Bandung_Dero
- udonmap.com
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- Location: Ban Dung or Perth W.A.
Pure sine wave inverters?
Must be a first! Never heard of anyone up here using an inverter to pump water, you must have a huge bank of batteries to maintain any sort of volume at 500 Watts. I guess your 1st hurdle is to find an oscilloscope to test it/them.
I'd look at a small Generator, my 1500 Watt, 220 VAC 50 HZ was only 5500 Baht available most anywhere. Uses a Liter of Benzine an hour (about 44 Baht). Runs my refrigeration, domestic water pump, TV, lights etc. during power outages, NO worries.
I'd look at a small Generator, my 1500 Watt, 220 VAC 50 HZ was only 5500 Baht available most anywhere. Uses a Liter of Benzine an hour (about 44 Baht). Runs my refrigeration, domestic water pump, TV, lights etc. during power outages, NO worries.
Sent from my 1977 Apple II using 2 Heinz bake bean cans and piano wire!
Pure sine wave inverters?
No, its a 150w pump, the inrush power is less than 450 w when the pump starts.Bandung_Dero wrote:Must be a first! Never heard of anyone up here using an inverter to pump water, you must have a huge bank of batteries to maintain any sort of volume at 500 Watts. I guess your 1st hurdle is to find an oscilloscope to test it/them.
I'd look at a small Generator, my 1500 Watt, 220 VAC 50 HZ was only 5500 Baht available most anywhere. Uses a Liter of Benzine an hour (about 44 Baht). Runs my refrigeration, domestic water pump, TV, lights etc. during power outages, NO worries.
As the pump runs only totally 1-2 hours a day a generator is a bad solution...
Pure sine wave inverters?
500w is real small for an inverter
how many HP is the water pump ?
because from what I know a 0.5HP pump will need a minimum of 1.5kw ( 1500watts ) pure sinewave inverter, and a 2.0HP pump will need a minimum of 4.5kw (4500watts ) pure sinewave inverter.
An inverter sized by these minimum guidelines will dip its voltage during the starting surge.
Personally I am on just a 12volts system, no inverter, and I run a Excell 12v waterpump as pictured..Flow rate is 5.5LPM, self priming, slient running, low power draw, and will run dry without damaging it...
how many HP is the water pump ?
because from what I know a 0.5HP pump will need a minimum of 1.5kw ( 1500watts ) pure sinewave inverter, and a 2.0HP pump will need a minimum of 4.5kw (4500watts ) pure sinewave inverter.
An inverter sized by these minimum guidelines will dip its voltage during the starting surge.
Personally I am on just a 12volts system, no inverter, and I run a Excell 12v waterpump as pictured..Flow rate is 5.5LPM, self priming, slient running, low power draw, and will run dry without damaging it...
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rickfarang
- udonmap.com
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- Joined: January 1, 2006, 6:01 am
- Location: Udon Thani
Pure sine wave inverters?
1 BHP = 746W (must take efficiency into account).
I have a scope if you want to have a look, send PM.
I have a scope if you want to have a look, send PM.
Pure sine wave inverters?
Maaka's on the right path, if you only want a pump for domestic water eg: kitchen, shower, toilets etc, then those little pumps do the job, they are used in caravans, and boats in Aussie, and other countries as well I suspect. Make sure you use an inline fuse to protect the pump against overload etc
Rickfarang: too true One HP indeed represents 746 watts (an imperial measurement)
Good luck Dr R with the problem.....cheers harpo
Rickfarang: too true One HP indeed represents 746 watts (an imperial measurement)
Good luck Dr R with the problem.....cheers harpo
Great Southern Land
Pure sine wave inverters?
Hmm. thats maybe a better solution, a 2 pump system: my Hitachi 230 v pump for normal operation and a 12V pump in parallelell for the very frequent power outs.maaka wrote:500w is real small for an inverter
how many HP is the water pump ?
because from what I know a 0.5HP pump will need a minimum of 1.5kw ( 1500watts ) pure sinewave inverter, and a 2.0HP pump will need a minimum of 4.5kw (4500watts ) pure sinewave inverter.
An inverter sized by these minimum guidelines will dip its voltage during the starting surge.
Personally I am on just a 12volts system, no inverter, and I run a Excell 12v waterpump as pictured..Flow rate is 5.5LPM, self priming, slient running, low power draw, and will run dry without damaging it...
So now i need to find a 150-200 W 12V pump
Pure sine wave inverters?
just for clarification
I catch my water off the roof of my forest house in NZ, and store it in a 5000 litre tank..My Excell 12v pump is inline just outside the tank. ( easier on the pump if close to the tank ) the power cable runs underground to the main switchboard in the house, and I have a fuse in there as protection..The outside waterline runs to a second smaller 200 litre plastic tank in the loft / attic. This gives me my gravity water pressure.. I guess the rise is 12- 14m from ground to roof tank..
The roof tank has a plastic ball tied to a mercury switch on the rafter above it..it works abit like a farm trough, or a cistern in a toilet..except in my case the ball floats on the water and when it drains down to a certain depth, and the ball it is left swinging in midair, it triggers the mercury switch which then automatically turns on my outside water pump..the mercury switch has a counter balance which only allows the pump to run for say 2 minutes, by which time it has topped up the roof tank again, and it resets itself...what this means is that the pump is not running everytime I turn the tap on, and therefore using up more stored power, it only comes on after I use 170 litres of water in the roof tank, then tops the tank up with another 170, then repeats that cycle 2 0r 3 times a day...
I catch my water off the roof of my forest house in NZ, and store it in a 5000 litre tank..My Excell 12v pump is inline just outside the tank. ( easier on the pump if close to the tank ) the power cable runs underground to the main switchboard in the house, and I have a fuse in there as protection..The outside waterline runs to a second smaller 200 litre plastic tank in the loft / attic. This gives me my gravity water pressure.. I guess the rise is 12- 14m from ground to roof tank..
The roof tank has a plastic ball tied to a mercury switch on the rafter above it..it works abit like a farm trough, or a cistern in a toilet..except in my case the ball floats on the water and when it drains down to a certain depth, and the ball it is left swinging in midair, it triggers the mercury switch which then automatically turns on my outside water pump..the mercury switch has a counter balance which only allows the pump to run for say 2 minutes, by which time it has topped up the roof tank again, and it resets itself...what this means is that the pump is not running everytime I turn the tap on, and therefore using up more stored power, it only comes on after I use 170 litres of water in the roof tank, then tops the tank up with another 170, then repeats that cycle 2 0r 3 times a day...
Pure sine wave inverters?
Had a 6 hour chase in udon for a 12 V pump: no luck, the electronics shop (Auorn or whats its name) had some 24 and 48V pumps. Steep price tho 4500 baht.
The same shop had also some pure sine wave converters, 1000W (2000 W peak) for 7000.
I may go for the inverter solutions, less hassle
The same shop had also some pure sine wave converters, 1000W (2000 W peak) for 7000.
I may go for the inverter solutions, less hassle
Pure sine wave inverters?
With your header tank at 200 litres, had you thought perhaps a smaller 12v pump filling the header over a longer period of time?
You should have enough reserve for normal use , just need to select a pump which will handle the head pressure at that height.
Duty cycle of the above 12v example pump should be ok with just over 5 litres a minute.
You should have enough reserve for normal use , just need to select a pump which will handle the head pressure at that height.
Duty cycle of the above 12v example pump should be ok with just over 5 litres a minute.
Pure sine wave inverters?
hiya, if you are referring to me Bluejets, my Excell pump is about the smallest I can get, and I have oodles of solar power, so I am not worried about it..my system has served me well since 1996, but I take on board what you said...
I was just giving the OP some ideas and a comparison..I am not sure what he wants to pump water too, the house, or for watering the rice fields, or filling up his fish ponds..
5 LPM was not the best for me, after I went out and bought a califont.( gas fired hot water thingy ) Because the califont is like a car radiator, where the water passes thru a row of filaments, the speed of the water is slowed, and the pressure at the shower head was like showering under a straw, so what I did was throw a second Excell 12v water pump inline just before the califont, and that now pushes the water thru the shower head at a normal pace...
ideally I should have my outside water tank on the hill above my house, and then water pressure would be like a water blaster, but when it is only above my head in the loft, pressure is ok, and I used my standard shower no problem..it was only when I decided to get all DIY and make another shower outside, so when I came back from fishing and the beach smelling of fish guts, wet clothes, and covered in sand, I didnt drag that lot thru the house, then of course its not 40 degree here so the califont was needed to thaw out my nether regions, and hence the second pump..there are no neighbours within rifle shot of me, so having a shower with nature is the way to go, and saves cleaning the bathroom...
I was just giving the OP some ideas and a comparison..I am not sure what he wants to pump water too, the house, or for watering the rice fields, or filling up his fish ponds..
5 LPM was not the best for me, after I went out and bought a califont.( gas fired hot water thingy ) Because the califont is like a car radiator, where the water passes thru a row of filaments, the speed of the water is slowed, and the pressure at the shower head was like showering under a straw, so what I did was throw a second Excell 12v water pump inline just before the califont, and that now pushes the water thru the shower head at a normal pace...
ideally I should have my outside water tank on the hill above my house, and then water pressure would be like a water blaster, but when it is only above my head in the loft, pressure is ok, and I used my standard shower no problem..it was only when I decided to get all DIY and make another shower outside, so when I came back from fishing and the beach smelling of fish guts, wet clothes, and covered in sand, I didnt drag that lot thru the house, then of course its not 40 degree here so the califont was needed to thaw out my nether regions, and hence the second pump..there are no neighbours within rifle shot of me, so having a shower with nature is the way to go, and saves cleaning the bathroom...
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Pure sine wave inverters?
Sorry Makka, I should have been a bit clearer, I meant the comment for the OP.
Thought he might not have thought about filling over a longer period.
ps..that's some view.
Thought he might not have thought about filling over a longer period.
ps..that's some view.
Pure sine wave inverters?
rodger that Bluejets...
yes the sunsets are something too.
yes the sunsets are something too.