Sol-Ark 12K 59V for sale?

fisherus

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Nov 16, 2019
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A year ago I purchased another Sol-Ark 12k. I opened the box and perused the manual to see if any changes were made. After not finding any, I put it back. The following week, I fell 19ft. off a scissor hoist while hanging a light fixture in my shop, resulting in 14 fractures. 11 surgeries and over a year later, I opened the box to register the serial number and to my surprise, found this Sol-Ark 12K is made for 59V. Because I am using LTO SCiB batteries and need to have a Nominal voltage of 60V, this one will not work for me. So, if you are interested in a Sol-Ark 12K for your solar system and are using lithium or lead-acid batteries, I have a deal for you. $5995.00 plus freight. This will save you over $855.00 off the price. Since it has never been turned on, I imagine that the complete 10yr warranty should still apply. PM me if you are interested.
 

MurphyGuy

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This doesn't make sense unless I'm missing something.
If the nominal voltage of the inverter is 59 volts, why is a 60 volt LTO a problem?
 

RV10flyer

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Mar 8, 2021
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As a DIY’er, I bought two 12K’s at that same price in May 2021, I’d say you’ll have to go much lower to get any bites.
 

fisherus

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Nov 16, 2019
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This doesn't make sense unless I'm missing something.
If the nominal voltage of the inverter is 59 volts, why is a 60 volt LTO a problem?
Because it won't charge high enough to get the best curve from my battery bank. My LTO SCIB batteries are 64.8V and I intended to charge them at 61V with a Nominal of 60V and a Minimal of 48V. Therefore, my BMS'S will never make it to top charge. The maximum charge of this inverter is 59V.
 

Lt.Dan

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Dec 25, 2020
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Because it won't charge high enough to get the best curve from my battery bank. My LTO SCIB batteries are 64.8V and I intended to charge them at 61V with a Nominal of 60V and a Minimal of 48V. Therefore, my BMS'S will never make it to top charge. The maximum charge of this inverter is 59V.
So this is still a 48v Nominal Inverter, not 59v Nominal?
 

Bluedog225

Texas
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Nov 18, 2019
Messages
217
Sorry about the fall. I went about 14’ onto my concrete shop floor. Similar results. Hope you are feeling better. I’m about 2 years out and things are better. Lots of pt.
 

SolarPrep

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Jul 15, 2021
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Because it won't charge high enough to get the best curve from my battery bank. My LTO SCIB batteries are 64.8V and I intended to charge them at 61V with a Nominal of 60V and a Minimal of 48V. Therefore, my BMS'S will never make it to top charge. The maximum charge of this inverter is 59V.
I'm not an expert on Sol Ark, but many inverters that list their charge parameters on a spec sheet can be changed in the unit settings. I'd be surprised that Sol Ark would only go to 59. Like you, I also have some LTO, but mainly for a small dedicated system. When I looked at the charge profile, it didn't appear there was that much energy at the high end of the charge profile. Are yours Honda Fit units? (Toshiba) I charge mine right now on a lab grade charger, to 31v, then series them. (Temporary)

What BMS are you running?

I guess what I'm getting at is don't be quick to sell off that inverter. It is a good unit.
 

fisherus

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Nov 16, 2019
Messages
65
Apparently when Sol-Ark first came out with the 12K it was made with a 59V top end charge maximum rate for a short period before they changed it to the present 63V rate that they have now. I'm assuming that the Alt-E store had some older stock in this configuration that they sent me. This unit works great for all lithium ion and other types of batteries except for the ones in the configuration of my LTO SCiB batteries. I could reduce each battery by 2 cells and make it work but I will lose almost 4.7Kw of storage by doing it. The other problem is that to do this, I would also have to buy different BMS's and rewire every battery. This would be a huge job with a loss of return. The only other option is to use this one and use a lower Nominal charge rate, which is the best option if I keep it. I will still be losing quite a bit of power in my battery bank but not as much work, however the problem here is that the BMS's won't ever top balance my batteries.
 

SolarPrep

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Jul 15, 2021
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Which LTO are you using? Do they have the welded buss bars? Could you reconfigure them by cutting buss bars, and tapping the plates, or some other method to allow for new terminals? My Fit batteries are very hard to modify, and I decided it wasn't worth the mess. I don't have as many as you, so it isn't as big of a deal.

Well, you could sell them. LTO are easy to sell. Or, like you said, just reduce the charge limit. Unlike other battery chemistries, you won't ever be able to use the "extra" life, because there is so much cycle life to begin with.

hey...good luck!
 
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