Mixed battery ages
I have had, for 3 years a stand alone system 6 KY 130s/Outback MX 60 and 4 CR 225 batteries that did fine for the limited uses I had ( just a greenhouse and small tools) A lightning strike took out my Heart Interface 2000 and since I am breaking ground for a house on the property I upgraded to an Outback VFX3524, some 302 surge arrestors ( hard lessons) and wanted to double my storage. I will add more panels to the system when the house is done) Well I am mad at my own ignorance, (and that of the salesman) in adding 5 new CR 225 ( one of my 4 was weak) to the now 24v string.
Now I have learned that was a bad choice, and I should get 3 new batteries to replace the older ones in the string. So I need to figure a use for the older ones. I have a well, ( grundfos SQFlex with 2 Shell 125 panels and CU controller) which feeds 600 g storage, soon to add 3000g storage. Is there any advantage to adding batteries to the well? And if so how does one deal with freezing temps? The well setup BTW is 600' from the point of use.
Any ideas for use for the 3 year old Crowns?
Off grid, all solar, passive and active (winter wood heat supplements) PV DHW.
Array 1-- 12 Sunpower 250, Outback FM 100 3kw
Array 2-- 12 Sunpower 250, Outback FM 100 3kw
Well array 780w, 6 Kyocera 130 w with Grundfos sqflex 11 and cu200 to elevated storage, ( 2- 330 g tanks,) no battery storage at well
10 24 volt Battle Born Lithiums
Outback Flexpower Two, VFXR 3524A 7kw