MECER 1200VA INVERTER lithium compatibility

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ClarityJuice

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So I bought this inverter "MECER 1200VA 1000W 12V W/MPPT INVERTER" which looks to be compatible with Lithium with no problem.

Now I have a 200-ah lithium battery to go along with it, only to be told by the retailer that I must not use the 25amp charing option as it will pop the inverter. I find this to be a bit ridiculous. I need to now use the 10amp charging option which takes hours with my 200ah lithium battery. The retailer, which I won't bother naming, just said the reason is "it gets hot" and "it will pop".

So fair enough, but why sell this inverter if it can't handle lithium? Essentially they're selling a product faulty right off the shelf.

Anyone else here have this inverter?
Should I return it?

Cheers
 
ClarityJuice said:
So I bought this inverter "MECER 1200VA 1000W 12V W/MPPT INVERTER" which looks to be compatible with Lithium with no problem.

Now I have a 200-ah lithium battery to go along with it, only to be told by the retailer that I must not use the 25amp charing option as it will pop the inverter. I find this to be a bit ridiculous. I need to now use the 10amp charging option which takes hours with my 200ah lithium battery. The retailer, which I won't bother naming, just said the reason is "it gets hot" and "it will pop".

So fair enough, but why sell this inverter if it can't handle lithium? Essentially they're selling a product faulty right off the shelf.

Anyone else here have this inverter?
Should I return it?

Cheers
Click to expand...
I am sorry you had to buy that mediocrity, next time ask here, we have better experts. I have a 1000W inverter that is super silent, and can charge lithium, I think the highest current is 30A.

Try to sell it and get a better inverter.
 
TheChamp said:
I am sorry you had to buy that mediocrity, next time ask here, we have better experts. I have a 1000W inverter that is super silent, and can charge lithium, I think the highest current is 30A.

Try to sell it and get a better inverter.
Click to expand...
Any harm in using this inverter if the parameters are correct for charging etc?

The mecer one.
 
Last edited:
Funny that it can be too hot if AC charging with 25A

While the mppt charging amps can go up to 55A

Who knows only those that have actually used lithium at the 25A i suppose , or if the seller has encountered problems thus making the suggestion or maybe making the suggestion because other model mecers have had problems on higher charge rates

I suppose the time to test is while still under warranty
 
leon.davibe said:
Funny that it can be too hot if AC charging with 25A

While the mppt charging amps can go up to 55A

Who knows only those that have actually used lithium at the 25A i suppose , or if the seller has encountered problems thus making the suggestion or maybe making the suggestion because other model mecers have had problems on higher charge rates

I suppose the time to test is while still under warranty
Click to expand...
I think it's just a blanket precautionary measure that all Mecer resellers have been taught to recite to customers, it might be true or it might not be.
 
TheChamp said:
I think it's just a blanket precautionary measure that all Mecer resellers have been taught to recite to customers, it might be true or it might not be.
Click to expand...
Understandable with the 720/1440w

But yea blanket statements is crap like the e30 bmw 4cylinder vs 6 i would not touch that 4 cylinder with a barge pole and yet the 6 is clearly up to the all kinds of abuse
 
leon.davibe said:
Understandable with the 720/1440w

But yea blanket statements is crap like the e30 bmw 4cylinder vs 6 i would not touch that 4 cylinder with a barge pole and yet the 6 is clearly up to the all kinds of abuse
Click to expand...
I have a silly question, yet to find someone who knows. How exactly does an inverter know when to stop charging a battery?
 
ClarityJuice said:
So I bought this inverter "MECER 1200VA 1000W 12V W/MPPT INVERTER" which looks to be compatible with Lithium with no problem.

Now I have a 200-ah lithium battery to go along with it, only to be told by the retailer that I must not use the 25amp charing option as it will pop the inverter. I find this to be a bit ridiculous. I need to now use the 10amp charging option which takes hours with my 200ah lithium battery. The retailer, which I won't bother naming, just said the reason is "it gets hot" and "it will pop".

So fair enough, but why sell this inverter if it can't handle lithium? Essentially they're selling a product faulty right off the shelf.

Anyone else here have this inverter?
Should I return it?

Cheers
Click to expand...

My BIL had a slightly older one of these and it popped with the higher charge rate on lithium batteries.

This problem was supposedly fixed in the new models. But who knows ?

Try to find out if that is a new model that can handle the higher charge rate on lithium.

Else return it.
 
ClarityJuice said:
I have a silly question, yet to find someone who knows. How exactly does an inverter know when to stop charging a battery?
Click to expand...
Different batteries settings has different logic, as far as i have it on Li/USE settings

Once it hits full voltage it keeps voltage until amps drops to something like 10% of charge rate then it switches to float

Other battery types may have a timed stint on that constant voltage , ie lead acid tends to charge slower the as they get full
So using the amps not as accurate so they tend to say absorb for x time once it has hit full voltage
 
ClarityJuice said:
Any harm in using this inverter if the parameters are correct for charging etc?

The mecer one.
Click to expand...
Only harm with the slower charge rate is if you can't charge enough when we have higher stages

With 4hrs off 4 on 4 off, if your usage pattern fits and you don't have low voltage shutdown no problem

If you land with a flat battery on 2nd loadshedding before power comes back is the only problem you can bump into

Can ad an additional charger to help in those scenarios

Especially if you have an old laptop charger lying around (adding a buck converter makes a better charger than a car charger)

Charging with 2 chargers is not a problem , and a lot cheaper than buying another inverter

Or getting a panel naturally
 
I would leave it on low charge rate 10A as when i google i get results for popped inverter with lithiums

So this item may be similar to other mecers ie with sub par AC chargers

And will most likely run fine on the lower charge rate

I had a different mecer model that ran fine for years on slow charge, but did not last long once changed to faster charge rate
 
leon.davibe said:
I would leave it on low charge rate 10A as when i google i get results for popped inverter with lithiums

So this item may be similar to other mecers ie with sub par AC chargers

And will most likely run fine on the lower charge rate

I had a different mecer model that ran fine for years on slow charge, but did not last long once changed to faster charge rate
Click to expand...
leon.davibe said:
Only harm with the slower charge rate is if you can't charge enough when we have higher stages

With 4hrs off 4 on 4 off, if your usage pattern fits and you don't have low voltage shutdown no problem

If you land with a flat battery on 2nd loadshedding before power comes back is the only problem you can bump into

Can ad an additional charger to help in those scenarios

Especially if you have an old laptop charger lying around (adding a buck converter makes a better charger than a car charger)

Charging with 2 chargers is not a problem , and a lot cheaper than buying another inverter

Or getting a panel naturally
Click to expand...
Thanks for the info. So I got the Fivestar 1000w pure sine for another part of our business that uses 2x gel. What a difference in quality. Not sure how mecer get away with selling such junk. Anyway I'm stuck with the rubbish mecer. My only concern was charge rate 10amp being too low, with lithium, if that's such a thing. The inverter does have low voltage cut off so at least I'm covered there.
 
ClarityJuice said:
Thanks for the info. So I got the Fivestar 1000w pure sine for another part of our business that uses 2x gel. What a difference in quality. Not sure how mecer get away with selling such junk. Anyway I'm stuck with the rubbish mecer. My only concern was charge rate 10amp being too low, with lithium, if that's such a thing. The inverter does have low voltage cut off so at least I'm covered there.
Click to expand...
No 10A isn't too low
On lithium you actually get more out of the charging amps as the battery chemistry is like 99% efficient while a lead acid is like 70% so with lead acid you're getting almost the whole 10A into the battery while lead acid is like 7A on avg

I often set my inverter to charge at 10A when i don't care how long it takes to charge it full when i want a quieter inverter

In fact a slower charge rate will extend your balancing time giving the bms more time to do its thing

As long as the 10A can replenish what you used, so that you don't inch closer to empty with every shedding
 
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