Iron Edison

Clean Energy Storage for a New Generation

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Nickel Iron / Iron Edison USA Series Nickel Iron (NiFe) Battery

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100Ah and 300Ah cells are now being made in the USA. Batteries can be configured in in series / parallel for 100Ah, 200Ah, 300Ah and 600Ah capacity.  12V, 24V, 48V batteries available.

Reserve your batteries today!  Please call today at 720-432-6433 or email

Free Pickup from our warehouse in Gainseville, FL.  All batteries must ship HazMat, contact us for a shipping quote to your area.

Iron Edison USA Series Nickel Iron (NiFe) Battery

Thomas Edison’s battery is being made in the USA for the first time in over 40 years.  Proudly manufactured in a brand new factory located just outside Gainesville, FL.

Each group of 10 cells makes a 12Volt 100Ah battery.  Multiple batteries can be wired in series and parallel for higher voltage and more ampere hour capacity.

Click here to see a complete system with the USA Series battery, solar panels, inverter, and more.

This battery is rated for 10,000+ cycles at 80% Depth of discharge.   

Integrated watering system – makes maintenance fast and easy!

Fused Iron plates are produced by ENCELL Technology, USA.  Fused Iron is a patented process that creates a stronger and more efficient iron electrode. 

Ability to survive frequent cycling is due to the low solubility of the reactants in the electrolyte.   Unlike lead acid batteries, the plates of the NiFe battery do not dissolve into the alkaline electrolyte.  There is no suphation because the plates don't change state.  

Lead acid batteries are susceptible to damage at temperatures above 80F and below 32F.  The supporting structure of a lead acid battery will melt at high temperatures.  

Nickel Iron batteries have a steel construction.  The nickel and iron plates never dissolve into the electrolyte - they always remain in their solid metal form.     Low temperatures may slow down performance, but when the battery warms back up, there will never be loss of capacity.  

The Last Battery You Will Ever Buy

Iron Edison recommends Nickel Iron (Ni-Fe) battery technology for your off-grid or renewable energy storage needs. Vastly out-lasting the 7 year life cycle of their lead-acid counterparts, Nickel-iron battery systems have an expected life of twenty five years or more and are quickly becoming the environmentally sensitive choice for off-grid and renewable energy storage applications.

Over a century ago, Thomas Edison found a battery design that he considered to be nearly perfect. Today, Iron Edison is proud to offer an updated version of this incredible design that is specifically manufactured for Renewable Energy systems.

  • Refillable alkaline electrolyte
  • Full depth of discharge
  • 12, 24 and 48 Volt applications
  • Nearly indestructible

Sizing Nickel Iron batteries

It's important to compare the available Amp hours in our battery to the available Amp hours in a lead acid battery.  With our Nickel Iron batteries, you can discharge up to 80% of the total capacity without any damage the cell or its future capacity.  With a lead acid battery, it's recommended to use only 20-30% of the total battery capacity to get 5 years of life.  This means over-sizing the lead acid battery, which causes problems with the number of parallel strings and with having the proper inputs to recharge a huge battery.

Our design philosophy is to recommend a balanced system.  This includes having a battery that can be recharged in one day, with extra power to keep running your loads at the same time.  In order to figure out exactly what size battery is right for you, please give us a quick call and we will help you very easily understand our calculations.  

In general, let's compare our battery to a 24 Volt 1200 Amp hour lead acid battery.  With a recommended depth of discharge of 30%, this lead acid battery would provide you with 360 Amp hours of available capacity.  At the very most, you would have 600 Amp hours available if you discharged to 50%.  This 50% DOD will absolutely shorten the life of a lead acid battery to less than 5 years.

To achieve the same capacity with Nickel Iron, I would recommend a 500-600Ah 24V Ni-Fe battery.  The smaller 500Ah cell would be sufficient, and would provide 350Ah at 70% depth of discharge.  The 600 Ah cell would be more than sufficient, and it offers a larger electrolyte capacity than the 500Ah cell size.  With the 600Ah cell, the physical size of the cell is almost double the 500Ah cell, and there are industrial-sized lugs on the larger 600Ah cell.  There is more info below on the different cell sizes.

In this example, the 600Ah cell would offer 480Ah of available capacity with 80% DOD and 300Ah at 50% DOD.  With our Nickel Iron batteries, we are able to use a smaller battery that is going to offer much more capacity than an equivalent lead acid battery. 

Cell Size Info

Number of cells: 10

Weight: 78 lbs

Dimensions 24.5” Wide, 4.25” Deep, 12.8” Tall

Crate dimensions 1 Battery: 30” Wide, 12” Deep x 20” Tall, 90lbs   2 Batteries in 1 crate: 30” Wide, 24” Deep, 20” Tall, 180 lbs

Multiple batteries can be wired in series for 12V, 24V, or 48V inverters.  


The alkaline electrolyte in the US Series Nickel Iron Battery is a special patented formula by Encell which consists of NaOH and LiOH.  This new electrolyte mix will give you over 11,000 cycles before needing an electrolyte refresh!  That means you can work this battery for 30 years before needing to change the electrolyte.  Consult the Materials Data Safety Sheet for proper handling information.  Always wear your saefty gear!

The chemical reactions in charging the Edison Storage Battery are, (1) the oxidation from a lower to a higher oxide of nickel in the positive plate, and (2) the reduction from ferrous oxide to metallic iron in the negative plate.  The oxidation and reduction are performed by the oxygen and hydrogen set free at the respective poles by the electrolytic decomposition of water during the charge.  The charging of the positive plate is, therefore, simply a process of increasing the proportion of oxygen to nickel. 

Every Nickel Iron battery ships as a HazMat item.  If your battery isn't shipping hazmat, you are not in compliance, and may face serious penalties including forfeiture of shipment.  Iron Edison is fully certified to handle your hazmat battery shipment.


The action which takes place in an Edison cell, both in charging and discharging, is a transfer of oxygen from one electrode to the other, or from one group of plates to the other.  This type is called an oxygenlift charge equation. In a charged cell, the active material of the positive plates is superoxidized (nickel(III) oxide-hydroxide) , and that of the negative plates Fe(OH)2 is in a spongy or deoxidized state.

The normal charge rate for the battery is C/5.  This is the Capacity of the Battery (in Amp hours) / 5 hours from full to empty = The discharge current (your C-rate).  For a 500 Ah battery, the C/5 rate is 500/5 = 100 Amps per hour of charge current.  You can charge the battery using any MPPT or most PWM charge controllers and achieve specific charging voltage.

The Nickel Iron battery is able to withstand a Boost Charge, and these short duration high rate charges can be given provided that the temperature of the electrolyte does not exceed 115 F. These short charges are very efficient and cause no injury. Rates up to three times normal can be employed for periods of 30 minutes.  

Normally, we charge the battery to a voltage of 1.65 Volt per cell (or just above).  With a 12 V nominal battery, we use 10 x 1.2V cells.  When charging, this 12V battery should achieve a voltage of 16.5 Volts.  

When working with specific inverters, we may recommend using one fewer cell in series.  This allows us to achieve the higher per-cell voltages without going over the inverter limits.  Because our batteries perform at up to 118% of rated capacity, the nominal loss of a single cell does not affect total capacity.    

In general, these cells like to be worked!  Charge them up and push your batteries hard with a heavy load.  You will find that your battery performs better with heavy use than if you let it sit in float charge.


In discharging the positive plates deoxidize and the oxygen, with its natural affinity for iron, goes to the negative plates, oxidizing them. It is permissible to continuously discharge up to 25% above normal (this would be about C/4).  Occasionally and for short periods, rates up to six times normal can be achieved (this would be about 1C)

Recommended max charge rate:  C/5

Recommended max discharge rate:  C/5

...Where C is the capacity of the battery in Amp hours

EX: 500 Ah battery

C / 5 = max charge or discharge rate

500Ah / 5h = 100 Amps per hour is the max charge or discharge rate 



Please contact us with any questions, we are happy to help!

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The Last Battery you’ll Ever Buy.

Over a century ago, Thomas Edison found a battery design that he considered to be nearly perfect. Today, Iron Edison is proud to offer an updated version of this incredible design that is specifically manufactured for Renewable Energy systems.

An Iron Edison Nickel-Iron Battery
  • Refillable alkaline electrolyte
  • Large storage capacity (up to 48 kWh)
  • Full depth of discharge
  • 12, 24 and 48 Volt applications
  • Nearly indestructible

Iron Edison now offers a full line of solar panels, charge controllers, inverters and more!

For more information on the advantages of Iron Edison batteries and on our company, check out our About page. Technical specifications and operating procedures can be found in our Reference Library.

A brighter future, off the grid.

A brighter future. Off the grid. Iron Edison battery systems can be used for 12, 24 and 48 volt applications. We can also help you optimize battery capacity to take better advantage of the solar, wind and other hardware you may already have in place.

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