Inverter and batteries

RedViking

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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.
 

TheChamp

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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.
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.
 

RedViking

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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.
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.
 

RedViking

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Nicely tucked away under my desk.

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My Geewiz Digital Watt Meter is not working (display nothing), so hopeful Geewiz will replace.
 

Dairyfarmer

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R121 @ http://www.communica.co.za/catalog/Details/P3238432112
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R55 @ http://www.communica.co.za/catalog/Details/P0081039952

Or go fancy
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R210 # http://www.communica.co.za/catalog/Details/P3288593548
 

RedViking

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i just have a cheapy R100 voltmeter that is wired up to the positive and negative of the battery and i monitor it like that. Works for me
Please explain how I will use the voltmeter to measure. So I have a 24V system. When do I know I am going to low?
 

Pineapple Smurf

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When fully charged in reads 24.8-25.0, so when it reaches 24.2 I should switch it off until it can recharge.
my UPS reads 27.4 volts on my array and it sits happily there all day and night.
When load shedding kicks in it goes down to around 25.4v before ESKOM comes back in.

I dont understand why you want to switch it off? Is it a UPS ? Or a big power bank that you want to switch on when load shedding kicks in?
 

RedViking

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RedViking

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cool give it some testing and stop when your batteries get to 24.2v else they will not last long in the long run
I wonder why yours read 25.4 and mine 24.8V. Also mine is modified sine, can that also be? Or I have a bigger load maybe?
 

Pineapple Smurf

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I wonder why yours read 25.4 and mine 24.8V. Also mine is modified sine, can that also be? Or I have a bigger load maybe?
no my APC UPS reads 27.4v non stop, not 25.4v.
It reads 25.4 when load shedding has finished after 2 and a bit hrs and ESKOM comes back on again
 

RedViking

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no my APC UPS reads 27.4v non stop, not 25.4v.
It reads 25.4 when load shedding has finished after 2 and a bit hrs and ESKOM comes back on again
So the manual also says it must read 27.4V. Looks like I must phone Geewiz again....
 

Pineapple Smurf

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So the manual also says it must read 27.4V. Looks like I must phone Geewiz again....
measure with a voltmeter set to DC over the positive connector of one battery and over the negative connector over other battery. Or just buy an inline meter as Dairyfarmer posted this morning.
I like to see it permanently on and what it is doing at all times.
 

RedViking

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measure with a voltmeter set to DC over the positive connector of one battery and over the negative connector over other battery. Or just buy an inline meter as Dairyfarmer posted this morning.
I like to see it permanently on and what it is doing at all times.
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I know I am a bit slow to understand. But how do I calculate the approximate hours I would get.

Lets say 2x105ah batteries, 24V, 300W draw.
 
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