Expandable system

[RStephen]

Newby here but have 35 years experience in integration.
Recently given a few old panels and want to start learning. Want a system that is expandable without too much upgrading.
Thoughts so far...
I want something that can grow with me and not constantly have to upgrade components.
I like 24v over 12v due to wire size and cost.
Items I have been thinking about. are
Controllers: Renogy and Epever controllers but also like the all in one systems like the EG4 All-in-one Solar System.
Batteries: Weize 12V 100Ah LiFePO4 Lithium Battery
Panels: No preference but think I prefer 24v for wire size.
Misc: MOES Dual Power Controller 50A 5500 Watt Automatic Transfer Switch
inverter: No preference yet...

Any thoughts or advice is appreciated.
Regards...

[Ampster]

Welcome. The selection of components for 48 volt systems is much greater. Once you get up to 5kW the wire size of at 48 volt systems becomes even more optimal. For solar panels, think in terms of Wattage over 300 Watts. They run higher voltage and are the least expensive on a per Watt basis. Depending on your electrical rates, peak shaving can provide some savings but my self generation and consumption costs are not less than $0.25 per kWh. The grid tied solar is the least expensive component at $0.05 per kWh. It is a fun hobby and I love reducing my PG&E bill to the minimum monthly charge. I started out ten years ago with Grid Tied systems but as rates increased and Time of Use period changes eroded benefits I began evolving to grid assisted battery supported systems. My peak rate is $0.55 per kWh and I have to EVs that I charge mostly from the solar during the day. I no longer pay for energy at the peak rates unless my wife needs to use the oven. I have enough credits from the grid tied portion of my system I do not worry about the ocassional use of the electric oven. My goal has always been energy independence.

[bcroe]

A lot can be learned with a small battery system, that background will
help realize goals, design, and construction of a more serious system.

For serious energy management, a net metering system is the
easiest and by far cheapest way to go. But it will need a lot of
planning and a contract with the power company. Just how well
it works will depend on the weather in your area, terms of your
contract, and your particular needs.

Here after a decade of energy management and earlier decades of
property management, PV solar provides all the heating, cooling,
and electrical energy needed. Construction cost was substantial,
but monthly expense is around $15, and maintenance is quite low.
Started as a well financed science project, with zero carbon footprint
bragging rights, soaring energy costs are making it look better
financially every year. Without a doubt DIY work will make the
project far more affordable. Bruce Roe