[RE-wrenches] sunny island and lithium

[jay]

Thanks William,

Yes it’s AC coupled which I neglected to include.  

Given how inexpensive the new inverter gear is, the age of the old stuff and seemingly the complication of integration I will propose replacement of both inverter and battery.  

thanks

jay





> On Jul 15, 2025, at 8:44 AM, William Miller via RE-wrenches <re-wrenches at lists.re-wrenches.org> wrote:
> 
> If the system is AC coupled I would suggest you dump the Sunny Islands immediately. 
> 
> We are soon going to wreck out 4 SIs and install 2 envy 12s. The SIs just would not work AC coupled to e-vault 18s. 
> 
> 
> William Miller
> Miller Solar.com
> 805-438-5600
> www.millersolar.com <http://www.millersolar.com/>
> 
> 
> On Tue, Jul 15, 2025 at 6:43 AM jay via RE-wrenches <re-wrenches at lists.re-wrenches.org <mailto:re-wrenches at lists.re-wrenches.org>> wrote:
>> HI All,
>> 
>> I might be inheriting a 12 yr old SI off grid system, that has a dying Absolyte battery.  
>> 
>> 
>> I know there have been some discussions on the SI and lithium. 
>> 
>> I’m just trying to understand what the options are with closed vs open loop, basically can it be done.  
>> 
>> If I do get the project, I will happily pay someone who’s done all the hard work for the education to tell me what the programming steps are.  
>> 
>> And at what point does it make sense to just remove the SI and install a AIO? 
>> 
>> thanks in advance.
>> 
>> jay
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