Inverter and batteries

MightyQuin said:
Unfortunately they already ran out of batteries. Now there will be up to a 20 working days wait, after you have already purchased it.

That is why I bought all my batteries and inverters during the days when everybody has forgotten about load shedding.
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So mine should arrive when loadshedding is over. :laugh:
 
thechamp said:
It is still good enough for what it was designed to do, is it not?
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https://www.altestore.com/blog/2015...-sine-wave-whats-the-difference/#.XGZdm1wzaUk

A modified sine wave inverter can be used for simple systems that don’t have any delicate electronics or audio equipment that may pick up the choppy wave and produce a hum. Old tube TVs and motors with brushes are usually ok with modified sine wave. Your digital clock will likely act funky, and battery rechargers quite often just plain won’t work. Some equipment may seem to be working fine, but may run hotter than with a pure sine wave and reduce the life of it.

Take heed if you’re considering buying a modified square wave inverter to shave a few bucks off your system costs. A whole raft of modern appliances won’t run as well and some not at all on this waveform.
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deweyzeph said:
The problem is that these cheap and nasty power trolleys use modified sine wave inverters.
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This has been debated over and over and over again. There is nothing wrong with modified sign wive if you use it on the right equipment. It is also clearly stated that these units are used for backup only, so you are not going to run your whole house on it. The system Dairyfarmer is running is a good solution for that. One size does not fit all.
 
RedViking said:
This has been debated over and over and over again. There is nothing wrong with modified sign wive if you use it on the right equipment. It is also clearly stated that these units are used for backup only, so you are not going to run your whole house on it. The system Dairyfarmer is running is a good solution for that. One size does not fit all.
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every week it is deja vu here on MyBB. Wish there was a Loadshedding section on the forum where all these threads can go sit for future people arriving and asking the same questions again. Can't blame them really as articles are scattered everywhere.

Please @rpm start a Forums --> General Discussions --> Loadshedding section as this topic is here to stay for many years to come :thumbsup: Then move all these threads there so it is easier for people to find relevant articles. Thank You
 
RedViking said:
This has been debated over and over and over again. There is nothing wrong with modified sign wive if you use it on the right equipment. It is also clearly stated that these units are used for backup only, so you are not going to run your whole house on it. The system Dairyfarmer is running is a good solution for that. One size does not fit all.
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That's great if by "right equipment" you mean nothing electronic. But what household doesn't have electronic equipment like LCD TV's, laptops, cellphone chargers, etc that almost every expert will tell you should NOT be run on modified sine wave inverters.
 
The issue is "electronics" is everywhere these days. Every new device except possibly stoves and ovens is now full of the "stuff". And what is also not accounted for when the catch-all statement is made about "Modified Sine Wave" is not suitable for "electronics", is that Modified Sine Wave inverters have also evolved. The modern designs are far far better than the older designs.
Now whether we can claim that the el-cheapo inverters we get these days are in that category ---- that is the question!
There is only one way to know, and that is to have a look at the specification (if of course, the supplier provides you with a spec).
 
Geoff.D said:
The issue is "electronics" is everywhere these days. Every new device except possibly stoves and ovens is now full of the "stuff". And what is also not accounted for when the catch-all statement is made about "Modified Sine Wave" is not suitable for "electronics", is that Modified Sine Wave inverters have also evolved. The modern designs are far far better than the older designs.
Now whether we can claim that the el-cheapo inverters we get these days are in that category ---- that is the question!
There is only one way to know, and that is to have a look at the specification (if of course, the supplier provides you with a spec).
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I've done my research are read reviews, and modified sine wave is fine. Most modern equipment is also designed to allow for modified sign wave. But this has already been debated enough in other threads.
 
In the end, it is about economics - No power - no revenue generation - no income vs Backup power and income with a possible higher risk of damage, which can be mitigated against with a dose of common sense and monitoring with precautions.

What is completely unacceptable, when suppliers of UPS's and inverters DO NOT tell you up front in their blurb what type of inverters its is. Then the decision is yours. Yous should have to scratch through the fine print to find the type and any other critical factor such as the type of batteries used and the expected stby time.
 
Got the cables all connected (knew the spark was coming but it gave me a fright anyway). Inverter powered up fine reading 25v and 2A. No load or utility in. Then the menu button wouldn't work. So GeeWiz will collect it on Monday to replace it.

So I've decided on going with a bigger backing board to hang on the wall. Found a box with a DIN rail that will house 2x2 pole isolators. So I will mound the box on the backing board. Utility in isolator will be housed there so I can isolate Eskom at the inverter. I will leave in Inverter out isolator on the main DB board.
photo_2019-02-15_14-10-27.jpg
 
Dairyfarmer said:
Got the cables all connected (knew the spark was coming but it gave me a fright anyway). Inverter powered up fine reading 25v and 2A. No load or utility in. Then the menu button wouldn't work. So GeeWiz will collect it on Monday to replace it.

So I've decided on going with a bigger backing board to hang on the wall. Found a box with a DIN rail that will house 2x2 pole isolators. So I will mound the box on the backing board. Utility in isolator will be housed there so I can isolate Eskom at the inverter. I will leave in Inverter out isolator on the main DB board.
View attachment 620372
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Why does it spark?
 
RedViking said:
I've done my research are read reviews, and modified sine wave is fine. Most modern equipment is also designed to allow for modified sign wave. But this has already been debated enough in other threads.
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yup as far as my knowledge goes.
only drawback is "some" modified cheap ones will produce a humming sound, sometimes you hear that in speakers. Annoying, i have a 20yr old modified inverter that does that.
the one thing i have heard that is bad about modified is running a fridge on it. Apparently the motors dont like it one bit. But this is something i havent researched properly yet
 
Chuckmyster said:
yup as far as my knowledge goes.
only drawback is "some" modified cheap ones will produce a humming sound, sometimes you hear that in speakers. Annoying, i have a 20yr old modified inverter that does that.
the one thing i have heard that is bad about modified is running a fridge on it. Apparently the motors dont like it one bit. But this is something i havent researched properly yet
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Older fridge motors(and even current cheaper models) used AC motors which don't always like modified and some won't even run on it at all.

Newer tech "inverter" type fridges use DC motors with an inverter before the motor so these would be fine to run on modified sine wave as the inverter beats it somewhat into shape.]

The world is moving towards DC motors in appliances even things like aircons and fish tank pumps use DC these days so for now it's down to your actual items that you own.
 
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