The lead acid batteries I bought seem to be almost junk after 1.5 years of regular use and some hundreds of cycles.
I was thinking of replacing them with a lithium Pylontech UP5000; 4.8kWH (or maybe a Pylontech US3000C; 3.5kWH).
(EDIT Feb 16th: I bought US2000C x 2 as it was what was available.)
It seems to be a good beginner´s option, as well as one of the very few lithium batteries available here in Chile and within my budget. With 3.25kWP Risen panels (10 panels), does it seem to be an OK choice?
Would the UP5000 (and the US3000C) be compatible with my inverter Axpert MKS II 5kW? It looks like it might well be, but I couldn´t confirm for certain from google searches or manuals.
Batteries would be in an unheated area with brick walls, and a corrugated plastic roof. Winter night/dawn can be around 0C (32F) although the average winter daily minimum is >0C. I would be fine with say a 10% reduction in energy at 10C, and say a 20% reduction at 1C. However I need to make sure these cold temperatures won´t be damaging to the battery or have a big effect on its longevity. The temperature range is stated to be 0-50C. I know these batteries prefer 25C to 5C or 0C but not sure how big a deal this is. I read that in such a case the battery shuts down at 0C. Not sure if that´s true. As long as it would switch seamlessly to grid, that would be OK I think, as it would be a minority of days when we are asleep in the early hours.
If anyone can help with any of that, then thank you very much.
EDIT: End July 2022: We have now been through the middle of a slightly colder than average winter, including some days with slight frost and temperatures around zero. Batteries worked fine as far as I can tell.
EDIT August 2022: The thermometer in my car said -1C today and I looked in the software and the batteries registered a temperature of 5-6C and said temperature state "normal" and everything seemed fine. I put a thermometer on top of the batteries and it also said 5-6C.
I was thinking of replacing them with a lithium Pylontech UP5000; 4.8kWH (or maybe a Pylontech US3000C; 3.5kWH).
(EDIT Feb 16th: I bought US2000C x 2 as it was what was available.)
It seems to be a good beginner´s option, as well as one of the very few lithium batteries available here in Chile and within my budget. With 3.25kWP Risen panels (10 panels), does it seem to be an OK choice?
Would the UP5000 (and the US3000C) be compatible with my inverter Axpert MKS II 5kW? It looks like it might well be, but I couldn´t confirm for certain from google searches or manuals.
Batteries would be in an unheated area with brick walls, and a corrugated plastic roof. Winter night/dawn can be around 0C (32F) although the average winter daily minimum is >0C. I would be fine with say a 10% reduction in energy at 10C, and say a 20% reduction at 1C. However I need to make sure these cold temperatures won´t be damaging to the battery or have a big effect on its longevity. The temperature range is stated to be 0-50C. I know these batteries prefer 25C to 5C or 0C but not sure how big a deal this is. I read that in such a case the battery shuts down at 0C. Not sure if that´s true. As long as it would switch seamlessly to grid, that would be OK I think, as it would be a minority of days when we are asleep in the early hours.
If anyone can help with any of that, then thank you very much.
EDIT: End July 2022: We have now been through the middle of a slightly colder than average winter, including some days with slight frost and temperatures around zero. Batteries worked fine as far as I can tell.
EDIT August 2022: The thermometer in my car said -1C today and I looked in the software and the batteries registered a temperature of 5-6C and said temperature state "normal" and everything seemed fine. I put a thermometer on top of the batteries and it also said 5-6C.
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