In my home, we have a 3kW system and 6.5kWh of battery storage and we are able to power our home, independent of grid input from march to October (most days), including cooking, and we are a busy family household. Although there is an investment cost to a PV and storage system (approx. £11k to suit a high consumption family home) it will have repaid itself within a decade, and it will last for many decades afterwards.
With spiralling energy costs predicted, a solar PV system can save you a fortune in the long term. The sooner you invest in a system the sooner you will start saving from it.