With current load shedding between stage 4 to 6 and stints of 4 to 4.5 hours is LFP batteries going to last! Current load shedding cycles for 2023 so far 3 stages of 2 to 2.5 hours per day. 3 x 365 days = 1095 charge/ discharge cycles per year. 4 Years i need to buy new batteries. The most expensive component of solar installation is the batteries. Is it going to be worth the investment at the end.

It definitely will last, because most can handle between 4000 & 6000 cycles. So that is more than 10 yrs. Also after this period the battery will have 60% to 80% of it's original capacity. 

Now if you said 2nd life cells I might have a slightly different opinion but New Grade A cells will behave as I have mentioned above. 

Its incredible how ppl are now starting to realize that Lithium is really the new Gold. 

It is dependant on how deep you discharge.

The 6000 cycles that they state are usually for 80% DoD.

Say 1 loadshed session of 2 hours uses 20% of your battery capacity, then 3 of those will be 60%

So basically you would have used up 60/80 (0.75) of a "rated cycle"

It does not matter if you use 20% and charge up or 60% and then charge up, they count as the same as far as the chemistry goes.

The counters of the BMS may have their own idea of cycles( each BMS brand has its own idea in any case), but as far as the chemistry goes, you should be fine.

 

 

13 hours ago, sjp said:

The 6000 cycles that they state are usually for 80% DoD.

The data sheet of my Leoch T48100 states 3500 cycles at 100% DoD. With solar I count 1 cycle per day, that would mean almost 10 years. But as I discharge to not less than 30% SOC, I expect quite longer useful life. Until then we might see even better and less expensive batteries.