Nickel Iron Testimonials

Changed my 48V system from Trojan L16P-AC 420Ah  to ... 300Ah NiFe batteries. Much more backup power.John was very helpful and knowledgeable. Very impressed"

P Terry
Email August 23, 2017


"I got the batteries this morning.  I opened up one case.  They look great."



March 31, 2017 via email


"In 2008, I purchased a set of Nickel Iron batteries from you, and   They continue to perform as I expected,   I'm now looking to replace my inverters.  I'm looking for  12 volt DC inverters, with  3000 watt maximum output. What do you recommend for use with Nickel Iron batteries.   My existing inverters were intended for use with Lead Acid batteries.  and while I got them to work with NiFe batteries, they were never happy with the voltage fluctuations during charging, or under heavy demand.  Thanks,"


February, 2017 email

"Yes we are running 12 volts nominal but now all 10 cells.  Our biggest loads are a Sunfrost fridge, Sundanzer Freezer, and a Sunstar fridge/freezer.  I have a longer electrical wire on these for intentional voltage drop to make sure the voltage doesn’t get too high. 


The Outback CC’s are going through the bulk very quickly and then on to absorb for 6 hours, generally the rest of the day.  I have set the absorb voltage to 16.5 volts but the amps going in are much lower than what the solar panels are capable of.  This may be normal but I wanted to check with you to see if there were any special configuration recommendations with these new Charge Controllers. 


The batteries are performing very well although I did under-charge them for a couple of months while I was reconfiguring my whole set up."


Thanks again for any recommendations,



May 6, 2016




"By the way, the cells looked very nice.  A little bigger than I first thought, but so far they look nice.  They were packaged really well."


Rufus Handsome, Missouri

May 4, 2016 email



You have proven the most helpful and knowledgeable person we have known for these cells and we appreciate your help. Thank you.


Best wishes

Rafael Onterio, Canada


January 19, 2015 email 

"Now that I got the charge controller straightened out, these batteries are performing beyond my expectations; I really don't feel worried when we have three or four cloudy days, like I used to with my lead acid batteries.  One of the best things about these batteries is that it is easy to tell when they need water, and it is easy to refill them.  Check out this great, venting,Plexiglas battery box that I built. I recommend this to any one."

 Best regards,


Jan 17, 2014 Missouri email


"So all total I have 5 systems installed, one system not installed, and one system on order. All systems are doing great and the customers are happy." 

-Dealer August 20, 2013 email 

"The electrolyte change went well. The batteries immediately responded to the change, and are performing phenomenally. "

           -Marcus, TX July 2, 2012 email


 "What caught my interest on NiFe was I could add cells at a later time to increase my capacity (my system is always growing) as well as if a cell goes bad. (this has happened twice with my LA batteries) without the same headache as lead acid and the long life. I’m in my early fifties and the thought of swapping out my batteries every 4 to 5 years for the next 20 years just didn’t thrill me.

That all said I decided on buying a set of NiFe batteries. As has been stated here the upfront cost was a little sobering. I called around and found the folks at BeUtlityFree will help finance some of the cost of a battery of brand new cells…even if they are Chinese. That was a big deciding factor on why I went with them for my purchase 
So far my experience with the folks at BeUtlityFree has been nothing but positive…of course my interactions so far has just been me sending them money, but they have been attentive to my questions and get back to me promptly whenever I contact them."

-Bob L, AZ Post on Otherpower forum May 23, 2012


"I have had my ChangHongs (purchased from BeUtilityFree) since last Sept. or so. They are running my PV-powered home very nicely. Compared with lead acid, they are a pleasure to work with as they are so much lighter in weight and can be discharged to zero without damage...being able to discharge them to that level without damage to batteries allows one to make do with a smaller-capacity bank....We have had no technical or electronic or electrical problems and have had to make no changes in our appliances, etc. We have a combination of DC stuff ['fridge, freezer, lights, fans] and AC [computers, TV, hand tools, etc.] and all are working normally and well."
Post on Otherpower Forum from our customer SH from Idaho Springs , Colorado - 12V @ 700 Ah @ C/5 rate March 12, 2012

"After three full charge/discharge cycles, I am running the house on the NiFe bank as of three days ago. So far, great. We'll see how they do with some short winter days and snow storms. But right now they are performing every bit as well as I'd hoped."
-SH from Idaho Springs , Colorado - 12V @ 700 Ah @ C/5 rate September 3, 2011

"Thank you ... for keeping us posted on the shipping progress & we were pleased the pack was complete with tools, apron, etc."

-Letter from T.B., Felton, CA July 2011

 "I can report being quite happy with NiFe, in my demanding off-grid application. I have lived off-grid for over 7 years, in Central Texas, with air conditioning no less...When all is said and done, having experienced what some feel are among the best and most trouble-free Lead Acid batteries, I love these NiFe's, and I am grateful to have them."

-Central Texas customer July 2011 Post on SolarPanelTalk, 48V 620 Ah@ 100 Ah rate, purchased in 2009

 "I am using Nickel Iron batteries on my house and it lives up to its historical claims.   All December I have been running on the bottom half of the battery bank voltage since we have had very very dreary weather.   I have been grateful that it is no problem to discharge them to an extreme when you need to.  Now the sun is coming back and we lasted through Dec 21st without having to protect the battery from the deepest of discharges. One week I took them right down to zero volts just to see what happens!  They came right up and held their charge!"

-Ian - Post on The Otherpower discussion board December 2010


;I've successfully filled my ten 305Ah batteries with electrolyte. I charged them to their equalizing voltage, then discharged them using a 2 kW pure sine wave inverter running big loads. So far they've performed really well. I'll be testing them more over the next month with a solar/wind system.
 -Rich June 9, 2008



  It looks like my NiFe batteries were worth the waiting for.  I finally got the first 10 cells filled, and charged, and I load tested them today.  The 10 TN-600 cells easily powered my workshop for several hours tonight.  The machinery draws about 100 amps, with the occasional surge up to 400 amps.  (starting motors).   They easily out powered my failing lead acid batteries, and nicely compliment my old "original" Nickel Iron cells.  (51 years old!).   Now hopefully, they will last longer than me!

- Trevor, June 24, 2008



"I'm one of (BeUtilityFree's)  ancient and very satisfied customers (you have a quote from me on your website! It's still true)"
-John Berton Nov 28, 2007 - original comment below



"They never need equalizing. I have never experienced any problem with overcharging... Not only would I use nickel-iron batteries again, but I would probably not want to set up a new system without them. The idea of using lead-acid batteries after the ease of nickel-irons is horrifying."
-John Berton, Home Power Magazine Issue #80 December 2000/Jan 2001

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