Because it doesn't look pretty like this?
View attachment 138762
It will be a shame putting the doors on it and closing it up.
Anyway, as for cost.
https://diysolarforum.com/threads/a...ut-ahead-going-full-offgrid.53943/post-701875
Now take the EG4-LL and use the same cycle count of 6000 cycles, and 5.12 Kwh and 90% capacity. Comes to $1700 plus shipping and tax comes to $2006.10 to my door.
5.12Kwh x .90= 4.6Kwh
$2006.10 divided by 4.6Kwh = $436.11 per Kwh
$436.11 divided by 6000 =$0.07268 per Kwh over the expected life cycle of the battery
My bank was $0.0264 per Kwh over the expected life cycle of the battery. The cost of the EG4-LL is 2.75 times the cost per Kwh for the DIY bank I have.
If you went to the one grocery store and they had 10lbs of sugar at 2.75 times the price of 10 lbs of sugar at another grocery store, which one would buy it from?