Nickel Iron NiFe Batteries

The Edison Nickel Iron Cell - NiFe - Environmentally Friendly & Reliable - Outlasts Lead Acid by Decades!

Lasting Energy Storage - Can last up to 40 years - Manufactured in Ukraine

See NiFE Data Sheet with capacities and dimensions

See the product installation guide here


Invented over 100 years ago by Thomas Edison as a non-polluting and non-consumable alternative to Lead Acid Batteries using no heavy metals!  Now manufactured once again worldwide after lead acid battery companies closed Edison's Plant in 1972.

We have sourced NiFe at a competitive rate at a little over double our cheap lead acid range and similar to our Rolls battery costs, cheaper than our salt water batteries, and cheaper than Lithium batteries.  This makes them a very viable option for long term off grid solutions.

They have a design life of 30-40 years and there is known NiFe batteries that are still going after 80 years!! If your looking for a long term battery solution, this is it!!  They are the most environmentally sound battery available.

You need 10 cells to make up a 12V bank, 20 cells for a 24V bank and 40 cells for a 48V bank.   Or you can use less cells to have a voltage range closer to normal Lead Acid batteries.

They have low operation cost, low self-discharge, long cycling life and environmental-friendly. They can withstand deep discharge, wide temperature variations, mechanical & electrical abuses and still show excellent and reliable performance over a long period. The operation life of solar Ni-Fe batteries is 30-40 Years, the working temperature range can be -40°C to 60°C, which is also the longest life battery for the PV system.

Wikipedia has some more good information on these batteries here

See our battery comparison chart to compare how the life and use of these batteries compare to other technologies.

We usually try to keep some 200Ah and 400Ah NiFE in stock.  The listings will show if we currently have stock.  We have a production run every 2-4 months and orders for batteries that are not in stock will be added to the next production run.


The battery is not harmed in any way if it is overcharged.

You can squeeze more amps out of the Battery
and it will still have a long life, unlike other types of batteries.

Additional Amp Hours - More usable power
The amp hour rating on NiFe batteries is a C5 rate, so you get around 30% more capacity on the C20 rate that is quoted on most Lead Acid.  Many Lead Acid quote the C100 rate which would mean the NiFe gives you around 70% additional capacity.  Plus the additional voltage range you can use from these batteries gives you much more usable power than Lead Acid.  We would estimate that you would get around the same usable power storage in a 400ah NiFe bank as in an 800ah C100 Lead Acid bank, thats double the usable power! Which means you can have a bank half the size making NiFe a more affordable option that will last and last.

Can take Serious Neglect and Abuse! (Don't try this at home!)
We had a customer who didn't water their cells and the cases of the entire bank exploded, but even after this the electrodes were all fine and the manufacturer re-cased them to be a fully working bank with no loss of amp hours!  No other battery could take that!  A strong testament to the hardiness of NiFE!

No Memory Effect
As there is no memory effect the battery is best used for everyday cycles where it can be discharged completely and recharged every single day.

No Acid and simple green technology
Absolutely no dangers battery acid and proven green technology No other battery on the market has the lifespan of a NiFe battery.

Low maintenance
When the battery is hard charged, it may be necessary to add some distilled water.

NiFe Battery does not freeze
Batteries do not freeze so it would be perfect for unattended cottages boats, or RVs over the cold winter months.

You can add more batteries in the future
More batteries can easily be added at any time so if you wish to add to your existing system it is no problem at all. For instance if you have a 500 ampere-hour system you can easily add an 800 Ah system.

High Depth of Discharge
NiFe batteries have a high depth of discharge without causing damage or reducing life of the battery, which will give you 50% more usable ampere-hours per cell than lead acid batteries.

Replace a Cell at any time
If you have a defective cell at any time even years later

Add different battery capacities in parallel
you have an existing 400aH, just add 700aH in parallel

The Electrolyte is a mixture of KOH and LiOH

Much lighter than Lead Acid
Nickel is much lighter than lead and so these batteries are significantly lighter.

Solar Charger Settings

For solar charge controller settings for these batteries we recommend the following:

  Standard no of cells. With Less Cells closer to lead acid voltage
  1.2V cell 12V
10 cells
20 cells
40 cells
9 cells
18 cells
36 cells
38 cells
Equalise 1.65v 16.5v 33v 66v   14.85v 29.7v 59.4v 62.7v
Boost/Adsorb  1.55v 15.5v 31v 62v   13.95v 27.9v 55.8v 58.9v
Float 1.45v 14.5v 29v 58v   13.05v 26.1v 52.2v 55.1v

Also set your inverter cut off to the lowest it can go, 9V, 18V, 36V to get the most out of your cells.

If leaving unattended for long periods of time and worried about water loss you can reduce the Float to 1.44v per cell.  If wanting to get more power stored and you can keep the electrolyte topped up then you can increase the Float up to 1.5v per cell and can also increase the Boost time to 4-8hrs and can also increase the boost voltage to 1.6v.

In winter when you have limited sun you can increase the Boost/Adsorb and Float upto near the Equalise voltage to ensure you get the most our of the limited sun available.  Ensure you regularly check the water if you do this.

New NiFE banks require 3-5 cycle charges to get them into service with their full power.  Equalise the battery bank, and then drain down to 1V per cell.  Repeat this cycle for 3-5 times.

If at any point you find they are not holding enough charge then you will want to increase the Equalise to 1.75V per cell and equalise for 24 hours, and then you may need to do 3-5 cycle charges to bring the power back into the batteries.

You can also do a 24V bank with 18 cells and 48V bank with 36 cells if you are using equipment that will not charge to the higher voltages.

If using NiFe with a Sunny Island, you would use 38 cells so the equalisation would be 62.7V as the max for the sunny island is 63V.

According to Edison's original manual from 1914, it is best to completely discharge the batteries from time to time before applying the equalisation charge.   Edison also recommends a 1.7 volt equalisation charge and he recommends changing the electrolyte every 5-10 years.

We have a charger for giving constant voltage equalisation charge for NiFE batteries 12V & 24V here and for 48V here


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