OffGridForGood
Catch, make or grow everything you can.
Not sure where in US you are, but from the comments SW likely (?) So lots of sun, but also lots of A/C needed. (at least these are at the same time of day generally!)Yeah, over time I would add more batteries and panels as needed to help with winter months.
You should always plan a system from the loads, back to the solar, not the other way around.
The batteries are by far the most expensive part of a solar PV system, so knowing the overnight energy needs is also very important - even if you start with less battery and add over time, plan out the system for the eventual battery needed. (most of us do this, batteries are expensive).
OR work with the utility to have a system where you feed in energy during sunny periods, and draw off energy as you need it. Requires a utility and rates that allow this to work.
Generally, 100kWh/Day / 5 hrs of good solar = 25kW PV array
Two or three days of automy = 200 -300kWh of battery (this is kinda crazy huge, unless you are @timselectric)
- if the weather was poor for solar, does the daily energy load remain 100kWh? ie say it is overcast and rain for two days, what is the power requirement for those two days? often the days with poor sun = days with less A/C it would be best to know what this difference is for planning.
To size the inverters you really need to know two things: Peak load in kW (ie start up loads) and daily energy use in kWh.
If you go with AIO inverters you need to size the SCC part to suit the 25kW array. ie high voltage MPP inputs are best. The EG18kpv is an interesting model I would consider. Keep in mind the "18k" refers to the PV input, not the AC output.
Budget: building a 100kWh/day system with three days of autonomy (300kWh) ground mount 25kW PV is a big project. Breaking it up into parts, done over a period of time can be one way to build it without financing.