To answer what I think your asking would be to expand your current system, not only will it be cheaper, but will give V2X time to evolve and mature where integration with current PV/battery systems will be much simpler and third party adoption cheaper. Take V2L as an example, it can easily be integrated with a PV inverter, hence why onboard bidirectional will be a gamechanger. Intercontrol are looking to come out with a range of V2X chargers next year, the domestic model will most like start at £3k + installation and addition intergration wont be cheap. Bjorn Neylands video here https://youtu.be/yL2Axttwr94 An interesting read of V2G trial in the Netherlands: https://urban-mobility-observatory.transport.ec.europa.eu/news-events/news/two-european-cities-advance-vehicle-grid-v2g-solutions-2025-07-04_en
Humax MXG V2G-Ready 7kW home charger tethered 7.5m. HMX – A01T7 £582.00 + Vat
Zapotec Go 2 7.4kW Type 2 socket V2G EV £649.00 + VAT
I was wrong under the impression V2G was ready too go following Octopus Energy recent announcements, there are 2 reasonably priced bi-directional chargers on the market, obviously I was wrong. Would V2H be viable or is that also at the trial stage.
Unfortunately I have suffered a brain injury and occasionally I get confused and often say the wrong thing.