There can be no better way of communicating the benefit of having battery storage than publishing the graph below.
It records the energy my house has taken from the grid each month, starting at January 2023 and ending January 2024*; the battery storage was commissioned on 1st November 2023.
The step-down in grid consumption from November is quite remarkable, - more than I ever expected.
The data for the graph is reliable; the figures come from the meter readings sent to OVO, the electricity utility who sell grid energy to me.
I look forward now to seeing how this graph pans out over a full year; the three months in which battery storage has so far been contributing, have been months when the Powerspout has generated at its maximum and there has been little input from solar; later in the year, the mix will change, - and therein lies my interest to see how the full year looks.
* I will update the graph each month after January 2024, and do this for 1 year, to give the latest information.
3 comments:
Adding 10kWh of battery capacity to your system is already proven hugely beneficial. I am curious whether you have considered the V2H potential of your older Nissan Leaf? (My search of your blog posts for V2G, V2H,and V2L gave no hits.) This recap of the Leaf's history notes Nissan's pioneering V2H -- a response to Fukushima community needs.
https://www.nissan-global.com/EN/STORIES/RELEASES/nissan-leaf-10years/
Hi Craig. Thanks for the comment and your link to the article about V2H.
It's a very good article and I read it to the end with great interest.
V2H has indeed been in my mind.
Only two days ago I signed up to receive updates about V2H from a UK business called Indra, https://www.indra.co.uk/v2h/
Indra manufacture standard EV chargers and are researching the possibilities of making and marketing a bidirectional charger.
The problem is that V2H and V2G have not yet jumped the hurdles of being legally permitted here in the UK. Even where you are in California, I think the same is true.
There are trials being done but wider rollout of the technology has not yet been given the green light.
For sure, it will come in time, and when that time arrives it will be a very attractive alternative to extending the storage capacity of my static battery, - so long as I'm still around by then !
Thanks for posting.
Bill
Being off-grid and free of interference, I sometime forget that utilities in some places can regulate behind-the-meter activities more than in the US. But one of the few strong selling points of the Ford F-150 Lightning is it's V2L/V2H capability. Any home with rooftop solar here has the automatic grid-isolation switching required for lineman safety. My wife's city home also has Enphase IQ8 islanding, so that the 3.4kW (southeast roof) PV system stays operating with her batteries. (Her 14-year-old 3.0 kW southwest roof Enphase system does shut down in a grid outage.) In any case, rooftop solar homes can do V2H for own usage. To export energy to the grid for compensation, any homeowner would need to participate in one of the utility pilot programs.
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