Does it make financial sense to build a Off-Grid 30kWh battery solar system for EV charging only?

[erix123]

Need some advice again if anyone can tell me if this idea works?

If the installer charge $1/w to install, instead of doing 10kw at once, just do 5kw now and expend to 10kw my own DIY later, like adding more panels/new array.
So I will buy all equipment that support for 10kw or higher but just installing less panels.

 

[Supervstech]

Need some advice again if anyone can tell me if this idea works?

If the installer charge $1/w to install, instead of doing 10kw at once, just do 5kw now and expend to 10kw my own DIY later, like adding more panels/new array.
So I will buy all equipment that support for 10kw or higher but just installing less panels.

A lot of installers charge $/Wh installed… looks like a smaller number until you realize you are getting 1/5 the solar per dollar.

 

[jasonhc73]

LFP should last 10 years if not drained below 20% daily.
2000 cycles is what? 5.5 years... so if you keep from draining below 20% and dont hit 100% SOC daily, thw bank should stay above 80% capacity for 10 years. If you add 20% capacity, and use the bank at 30kWh with a 36kWh bank, you can still use the 30kWh daily usage, and it will extend the life before cells drop to 80% ability.

After 2½ years of use, my LiFePO4 has recorded 28 cycles.

3.40V top and 3.125V bottom per cell (54.4V to 50.0V)

 

[Brucey]

After 2½ years of use, my LiFePO4 has recorded 28 cycles.

3.40V top and 3.125V bottom per cell (54.4V to 50.0V)

Wouldn't the math be 78456/1235? Or around 64 cycles? Or more if you aren't using the full capacity?