A smart plug and some routines would be effective enough. I use a Hive Plug for another purpose and can set it to dusk til dawn etc, but for weather based routines I would need to use an intermediary app like IFTTT as Hive doesn't offer weather as a trigger.
Depends on how technical you are...
This is what I meant above. I'm looking at the same. It's about using the battery to shift your usage to the cheaper rate. Yes there are conversion losses and longevity issues if you're min/maxing the battery every day, but if it pays itself off in 1/3 of the time of PV you can reinvest for...
Battery and a time of use tariff. Charge battery and car midnight to 4am at 5p/kwh, use battery during the day instead of grid at 32p/kWh. Someone posted a video in the general EV channel, you can pay off an 8kw battery in about 3-4 years.
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