Inverter and batteries

falcon786 said:
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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great to know, thanx for the share :thumbsup:
 
falcon786 said:
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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How do I check this and if my fridge has an inverter before the motor? For example does this 3.5K fridge have an inverter or is it only the top range?
 
RedViking said:
How do I check this and if my fridge has an inverter before the motor? For example does this 3.5K fridge have an inverter or is it only the top range?
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That fridge doesn't.

Easy way to tell if the fridge has an inverter, is when it has a digital temperature setting. It's not always 100% but generally.

Samsung like to advertise it as a selling point on their fridges. Bosch is my favorite choice for digital inverter fridges.

Usually in the R6000 range and up.
 
Pretty much any induction motor does not like anything not pure sine wave. Remember a lab experiment back at varsity where the whole purpose of the experiment was to undertake a series of tests dealing with harmonic distortion effects on induction motors ........

Presumably, the move towards DC motors (which BTW is NOT a new idea at all) is to be able to cater for alternative sources of power availability. Remember a fridge my parents had that ran on a DC compressor suitable for use when connected directly to a battery bank ( 1950's)
 
falcon786 said:
Lol it was R3800 a few days ago,now R400 loadshedding premium attached.
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Don't blame them to be honest. It's difficult to predict stock requirements with Eskom BS. At this stage my advice is buy all the batteries though.
 
deweyzeph said:
If you're happy with 1000W of power then this is by far the best power trolley:

https://www.takealot.com/smart-powe...including-2x-100ah-gel-batteries/PLID41356456

I bought one a few months ago and am very happy with it. It even has a connection to connect a solar panel too if you don't want to charge from the mains.
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Hey all

Been researching this and wanted to put out a warning.

"Energy Spark" are also selling this: http://www.energyspark.co.za/produc...a-1000w-pure-sine-inverter-ups-charger-solar/

The specs on their website are wrong, and the customer support chat agent has no idea what she is talking about. Turns out they are possible scammers. Energyspark is owned by the bitcoinprosper people. You can find more info here: https://mybroadband.co.za/forum/threads/bitcoinprosper-co-za-online-store-beware.939723/

The product is actually designed by http://smartpowersystems.co.za/ - and I must say, their presales communication is really good - much better than what I am used to from ZA suppliers! The inverter is made by Foshan Unipower. Only downside for me so far is that there is no automatic restart after the batteries run flat and power is restored. You have to press a button so it won't work for remote sites.
 
mister said:
Hey all

Been researching this and wanted to put out a warning.

"Energy Spark" are also selling this: http://www.energyspark.co.za/produc...a-1000w-pure-sine-inverter-ups-charger-solar/

The specs on their website are wrong, and the customer support chat agent has no idea what she is talking about. Turns out they are possible scammers. Energyspark is owned by the bitcoinprosper people. You can find more info here: https://mybroadband.co.za/forum/threads/bitcoinprosper-co-za-online-store-beware.939723/

The product is actually designed by http://smartpowersystems.co.za/ - and I must say, their presales communication is really good - much better than what I am used to from ZA suppliers! The inverter is made by Foshan Unipower. Only downside for me so far is that there is no automatic restart after the batteries run flat and power is restored. You have to press a button so it won't work for remote sites.
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Thanks for the link. Pity their website FAQs do not appear to be there or are not working properly.
 
RedViking said:
Why does it spark?
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The inverter internal components are taking in power even though the inverter is switched off. Think of it like your water pipes at home. If you have turned the main supply off to fix a pipe the turn it back on, you have all that air in the pipes that needs to come out.
 
IMG_20190223_095233-02.jpeg

Couriers woke me up 7:30 this morning. Inverter arrived with no coffee. Once fully charged it is quiet, when on battery the fan comes on, a little bit louder than my GPU.
 
RedViking said:
View attachment 623460

Couriers woke me up 7:30 this morning. Inverter arrived with no coffee. Once fully charged it is quiet, when on battery the fan comes on, a little bit louder than my GPU.
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@Chuckmyster please link me to the device you use to measure the batteries so I don't discharge them too far and some instructions how it works or calculated.
 
RedViking said:
@Chuckmyster please link me to the device you use to measure the batteries so I don't discharge them too far and some instructions how it works or calculated.
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A device would be nice but the inverter should have a built in low battery disconnect feature. Check on the manuals and see. Mine has it but bit is an Ellies, since they look similar I think they are the same thing internally.
 
thechamp said:
A device would be nice but the inverter should have a built in low battery disconnect feature. Check on the manuals and see. Mine has it but bit is an Ellies, since they look similar I think they are the same thing internally.
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Thanks champ. I checked the manual. It only shows what all the signs and warnings mean. The display does show 25%, 50%, 70% etc. However it would be nice if I can measure it more accurately. Will have to check from Geewiz if it disconnects automatically once it reaches 50%, don't want it to go lower than that.
 
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