Hello All

I'm looking for a good lithium battery option with about a 16/17k budget. 24v or 48v. Have found a couple options which would be best. Hows the quality on these Nenergy batteries. Was hoping to get about 3.8kw capacity but seems like theres very limited options in this range.

 

This will be used with a growatt 3kva hybrid inverter

 

This will be used mainly for lights, laptop, chargers etc during loadshedding.

 

Essener 24v 2.5kw - R12000

Nenergy 48v 3.8kw - R16000

2 x Mecer 12v 200ah - R17000 ( but this is 2nd life)

Fivestar 200ah 24v - R16000 ( still confirming but seems like the DOD ok this is only 50%)

 

Thanks 

Edited May 31, 20233 yr by Docs

Half the price of a Hubble 5kWh, but more than half the capacity. Something has got to give, and when we look at the specs for that Nenergy we see that it is rated at 30A for continuous discharge. So just under 1.5kW. So it's restricted on the size of the load it can carry. 

This may not be a problem for you if you really want to back up those few light loads, but you might not be able to use a kettle or microwave with this battery.

I'm not recommending Hubble particularly. It's just a very commonly used battery in SA, so it's the first thing I thought of to check against.

Try to figure out what your MAXIMUM backed up load could be at any time, as well as the likely continuous load, then check the specs of whichever battery you are considering and be sure that it can handle those loads.

Esener is rated at 100A for discharge and for charging. So it can better handle high demands (EG you could probably use the kettle), and it can be charged more quickly.

But it seems to be just a battery. There's no connection available for comms with the inverter in the pictures I have seen. 

Edited May 31, 20233 yr by Bobster.

20 minutes ago, Bobster. said:

There's no connection available for comms with the inverter in the pictures I have seen.

It is near identical with the Hubble AM-2 in terms of ports and connections.
Which Inverter Protocols are supported? That would probably need contact with the company to establish.

 

 

1 hour ago, zsde said:

It is near identical with the Hubble AM-2 in terms of ports and connections.
Which Inverter Protocols are supported? That would probably need contact with the company to establish.

If that's the same battery you can get for 12K then that's fine. I saw something else in the adverts I checked.

If you look at this page then what's shown in that video is the battery on the right, what my searches return is the one on the left.

12 hours ago, Bobster. said:

Esener is rated at 100A for discharge and for charging. So it can better handle high demands (EG you could probably use the kettle), and it can be charged more quickly.

But it seems to be just a battery. There's no connection available for comms with the inverter in the pictures I have seen. 

Thanks. What is the comms connection used for

13 hours ago, Bobster. said:

Half the price of a Hubble 5kWh, but more than half the capacity. Something has got to give, and when we look at the specs for that Nenergy we see that it is rated at 30A for continuous discharge. So just under 1.5kW. So it's restricted on the size of the load it can carry. 

This may not be a problem for you if you really want to back up those few light loads, but you might not be able to use a kettle or microwave with this battery.

I'm not recommending Hubble particularly. It's just a very commonly used battery in SA, so it's the first thing I thought of to check against.

Try to figure out what your MAXIMUM backed up load could be at any time, as well as the likely continuous load, then check the specs of whichever battery you are considering and be sure that it can handle those loads.

Thanks didn't realise the impact of that 30A. How is the Nenergy in general their 4.8kw has a constant 50A and max 100A which seems to be about right for a 3kva inverter.

 

Or would it be best to go with the essener and later on add another one if needed. Or if unavailable they to find another similar one with the same specs to add on.

 

Thanks

6 hours ago, Docs said:

Thanks. What is the comms connection used for

The comms is used to send various information to the inverter. Typically state of charge, sometimes settings (EG maximum charge current). Without comms the inverter has to estimate state of charge using the battery voltage and perhaps a count of energy in either direction since the battery was last fully charged. 

I would guess that the 2.5kW Esener has a minimal BMS that will provide protection EG shut down if the maximum current is exceeded. 

But check all this with vendors. I'm no electronics boffin. 

6 hours ago, Docs said:

Thanks didn't realise the impact of that 30A. How is the Nenergy in general their 4.8kw has a constant 50A and max 100A which seems to be about right for a 3kva inverter.

I have no opinion on the Nenergy batteries. I've seen them advertised and that's all. 

You're on a learning curve, and the lesson is that not all batteries are equal. 

This is why I said you need to get the best estimate on peak load and steady load, and then see if the candidate battery can meet those demands. 

Also the current limit often works both ways. If you can discharge at 30A, then you can probably only charge at 30A. With that Nenergy you can charge at

48V x 30A. So 1440W per hour. So 2.6 hours to recharge from flat. Not impossible to live with, but the Esener you can recharge in 1 hour. 

You don't want to do the fast charge all the time (batteries last longer if treated gently) but it's nice to be able to do that. The loadshedding schedule for my area gives 1.5 hours between two slots at one point today. Now how nice is it to be able to charge quickly? 

6 hours ago, Docs said:

 

Or would it be best to go with the essener and later on add another one if needed. Or if unavailable they to find another similar one with the same specs to add on.

 

Thanks

You're better equipped now. Quantify the loads as we've discussed. Now you have a minimum requirement. Either your battery (and your inverter) can meet that, or you have to reduce your expectations. 

Check for continuous and peak current. Some batteries will have a specification of (example only) 50A continuous, 100A for one minute in an hour. So with this hypothetical battery, assuming 24V, you could make a cup of coffee as you'd be within the peak limit (unless your kettle is an electricity guzzling monster). 

Do check your inverter's voltage, most 3kva inverters are 24V systems and cannot run on 48V batteries. Meaning you may be unable to upgrade your system with more batteries.

I suggest stay away from nenergy batteries. Build quality is good but absolutely zero support for software and inverter compatibility/settings are a nightmare to figure out.