Opinions on Mecer Inverter

[User52]

Mecer inverter never switches off, the screen is always on but the green blinking light changes to solid green after its charged. However the pass through plug points just feed power from your wall socket.

 

[savage]

Two 12V/100Ah batteries in SERIES = 24V/100Ah
Two 12V/100Ah batteries in PARALLEL = 12V/200Ah

FOUR 12V/100Ah batteries (2 connected in series, in parallel) = 24V/200Ah

I hope that clears it up.

 

[kahoel117]

I was going to ask the same question. I'm more than happy with the Ups. But would like to upgrade by adding 2 additional batteries. I was just wondering if the Ups would be able to charge 4 batteries.

 

[dunkyd]

Two 12V/100Ah batteries in SERIES = 24V/100Ah
Two 12V/100Ah batteries in PARALLEL = 12V/200Ah

FOUR 12V/100Ah batteries (2 connected in series, in parallel) = 24V/200Ah

I hope that clears it up.

Thanks for that. So if I buy another 102AH Energizer to match exactly the one I bought last week, connect them in parallel, they would be 204 AH and discharge less = longer life ?

 

[dunkyd]

I was going to ask the same question. I'm more than happy with the Ups. But would like to upgrade by adding 2 additional batteries. I was just wondering if the Ups would be able to charge 4 batteries.

Mine has a switch on the back , 10A or 20A ? Currently on 10. Should I move it to 20 when I connect another battery or is slower better?

 

[Dan C]

Thanks for that. So if I buy another 102AH Energizer to match exactly the one I bought last week, connect them in parallel, they would be 204 AH and discharge less = longer life ?

Should be. But the charging should take longer.

Mine has a switch on the back , 10A or 20A ? Currently on 10. Should I move it to 20 when I connect another battery or is slower better?

Got mine on 20A , I have 2 batteries. No idea if slower is better

 

[Mypro-D]

That was my thought.

How would I get longer capacity usage (longer load) on the 2400 model? On the 1200 I would add more batteries in parallel but am still limited to 770 watts.

Would I have to use 4 batteries to give me 24v and longer capacity?

Don't worry I got confused too.
That's why I put that link there. Seems as though you could have 24 Volts and double your Amp hours but you obviously need 4 batteries to do this. I thought that's what you meant?

If you have two sets of batteries already connected in parallel, you can join them together to form a series. In the diagram on the left, we have a bank that produces 12 Volts and has 20 Amp Hours.

Don't get lost now. Remember, electricity flows through a parallel connection just the same as it does in a single battery. It can't tell the difference. Therefore, you can connect two parallel connections in a series as you would two batteries. Only one cable is needed, a bridge between a positive terminal from one parallel bank to a negative terminal from the other parallel bank.

It's alright if a terminal has more than one cable connected to it. It is necessary to successfully construct these kinds of battery banks.

In theory, you can connect as many batteries together as you want. But when you start to construct a tangled mess of batteries and cables, it can be very confusing, and confusion can be dangerous. Keep in mind the requirements for your application, and stick to them. Also, use batteries of the same capabilities. Avoid mixing and matching battery sizes wherever possible

Always remember to be safe, and keep track of your connections. If it helps, make a diagram of your battery banks before attempting to construct them. Good luck!

 

[getafix33]

Don't worry I got confused too.
That's why I put that link there. Seems as though you could have 24 Volts and double your Amp hours but you obviously need 4 batteries to do this. I thought that's what you meant?

If you have two sets of batteries already connected in parallel, you can join them together to form a series. In the diagram on the left, we have a bank that produces 12 Volts and has 20 Amp Hours.

Don't get lost now. Remember, electricity flows through a parallel connection just the same as it does in a single battery. It can't tell the difference. Therefore, you can connect two parallel connections in a series as you would two batteries. Only one cable is needed, a bridge between a positive terminal from one parallel bank to a negative terminal from the other parallel bank.

It's alright if a terminal has more than one cable connected to it. It is necessary to successfully construct these kinds of battery banks.

In theory, you can connect as many batteries together as you want. But when you start to construct a tangled mess of batteries and cables, it can be very confusing, and confusion can be dangerous. Keep in mind the requirements for your application, and stick to them. Also, use batteries of the same capabilities. Avoid mixing and matching battery sizes wherever possible

Always remember to be safe, and keep track of your connections. If it helps, make a diagram of your battery banks before attempting to construct them. Good luck!

Thanks mate. Basically I am after the 1440 watts but want to run 12v, not 24v. What is the benefit of 24v? I run a 50" FHD Panasonic Plasma, Yamaha R-XV 2067 Amp, HTPC, DTSV HD PVR, BluRay Player and XBOX360.

My requirements are that I have enough capacity that my system can remain "live" for 2 hours. I don't want to utilise the system as I am normally at work, but I want to protect it from sudden shutdown at load shedding. I am not sure what the draw would be but I don't think more than 1440 watts.

 

[savage]

It's not for you to decide what voltage your battery bank must run at - it's the inverter that determines that (unless it supports multiple voltages, which I doubt).

As far as I know, the inverter in question runs off a 12V battery bank - you can't run on 6V, 24V, 48V... Only 12V will work.

You can either use 12V batteries in parallel and extend the run time (get a longer run time on batteries), or you can use 6V batteries and connect 2 in series in order to make the entire battery bank 12V.

For 1.5KW over 2 odd hours < 50% discharge, you should need somewhere toward 250Ah @ 12V.

 

[kahoel117]

You can maybe get one of the 12v ups systems from geewiz. You're current draw won't be that much. Though I'd rather go overkill and get a bigger ups with more batteries. We don't know what the future holds. Maybe next year it's 4 hours instead of 2.5 hours. Also running the Ups at its max wattage will just drain you're battery quicker and will take longer to recharge when the power comes back on.

 

[dunkyd]

Should be. But the charging should take longer.



Got mine on 20A , I have 2 batteries. No idea if slower is better

Surely the charging should be shorter if the discharge is less ?

 

[tRoN]

I have the older model 1440 watt. The fan is always on but louder when charging.
Seems to be coping Well so far.

 

[GazWrack]

If you were to install a breaker do you think the fan will go off but still pass power through the inverter? could be an option if you know sort-of when load shedding will occur, then you can just flip the switch and the inverter will be online for any power cuts? and it will be silent for 99% of the time?

I mentioned it earlier in the thread but I'll just put it here again.

I have the 2400va inverter and the fan is on pretty much most of the time. Three times now the fan has switched off after the barriers were fully charged (steady green light). On Sunday night the fan switched off and stayed off until Monday night after a simulated load shed of a few minutes (I wanted to see what would happen).

The charging takes a long time though, even after a 2 minute battery draw. It might be because I had an accident whereby I touched the two battery terminals together with a spanner when I was removing the old inverter

How long does everyone else's take to charge to full after a short load shed?

 

[User52]

Most of the day (8-12hrs) running 10A charger and 2x 12v 60Ah batteries. Yes i also niticed that, it u cut the power deliberately it tends to charge for 1 or 2 hours.... no clue why though :wtf:

 

[GazWrack]

Most of the day (8-12hrs) running 10A charger and 2x 12v 60Ah batteries. Yes i also niticed that, it u cut the power deliberately it tends to charge for 1 or 2 hours.... no clue why though :wtf:

Well it does do float charging which I guess will be at a trickle.
I have mine set to 20A.

 

[thehuman]

Any one want to monitor battery voltage while charging .would like to know if it have a 3 stage charger

 

[getafix33]

What is the point in running 24v?

 

[Sinbad]

What is the point in running 24v?

The higher the voltage, the lower the current required to power your load.

 

[User52]

From what i heard its more efficient inverting 24vdc to 240vac than 12vdc to 240vac

 

[thehuman]

What is the point in running 24v?

Less stress on components in inverter . Less current draw
Take a 2000va inverter
12v current draw 166 amps
24 volt 83 amps
48 volt 41 amps