admin
I was thinking of self-consumption rather than export. Imagine for example I have a fully charged battery at noon, and no solar generation expected. I would rather consume from the grid until 16.30 and only use my battery after that time, when import is at its peak rate. This requires charging to be maintained from noon till 16.30 to prevent earlier discharge.

Another way of looking at it is that I should be charging my battery (or maintaining it at 100%) in any slot where the import rate is lower than in the immediately subsequent slot (with caveats for expected solar generation and for expected consumption during the subsequent slots).

      kerregan Right, cool - so a "hold charge" for the gapped 30 min "non-charge" slots in your Agile charge window would do the job?

          kerregan I think that's a great suggestion as currently, if we're not charging from the grid, we are using our battery to run the home even if the half hr prices are on a par with what we chose to charge our battery. I would like to see something like a value we can set which automatically kicks the battery into supplying the house, for example over 25p. Failing that facility, a timed period would be a good compromise

            admin
            ‘Hold charge’ is a good way of thinking about it, and hopefully something that would be relatively straightforward to implement.

            It could though get more complicated over time 😀😀. For example, I have just seen an earlier discussion which suggested being able to charge up to and hold a specified % of battery capacity - chosen to cover expected consumption over a peak period.

            • Mat likes this.

              admin
              Another twist on this. Last night I was due to charge from 4.30 to 7.00. But because the battery was already 95% full, this slot was skipped. The effect was that the battery discharged in this low cost period rather than being preserved until after 7.00 when the rate is higher.

              ‘Hold charge’ would be much better than skipping the slot altogether.

                I like the hold charge idea, but stress to everyone not to rely on automation too much, every morning you need to check what slots are needed for the circumstances and check yourself throughout the day how your battery is holding out. Depending on the weather etc. If you rely on Automation you will get knock backs more often than not, at least until human like AI comes into it.

                The more code you add, the more things can and will go wrong.

                  Mat This is now doable if you configure an active Agile charge window with 0 slots to fill. It will not select any regular 'lowest cheap slots', but the rule for 30 min slots below the pence value specified in Advanced settings will kick in.

                  • Mat replied to this.

                      Gazzagreen

                      That’s true in the short term, whilst the users are enthusiasts. But the mass market needs a fully automatic solution, accepting that it will not be 100% optimised.

                        admin I can't set a charge window without the message at the bottom of the page coming up, as shown in the attached photo

                          Reload the whole page, and use 01:00 in the To slot instead of 1.00.

                          Shouldn’t cause an error like this though. We’ll check the logs.

                          Thanks for reporting it.

                          • Mat replied to this.

                            admin still doing the same with 01.00

                                Mat can you refresh and use a colon instead of a dot/period?

                                Right - I think I know what's happening - correct time validation not being applied there. Reload and use 01:00 and you should be good.

                                Needs a proper validation message like on normal schedules.

                                Fixed as per release 339. https://community.wonderwatt.com/d/96-wonder-watt-release-notes

                                • Mat replied to this.

                                    Was there any issues last night? A big block of charge for me from 0330 to 0600 was missed. It correctly charged a couple of earlier half hour slots and the activity log says a charge instruction was set but it didn't charge?

                                    Is it because the charge instruction was sent after the slot had started?

                                      admin I entered 01:00 as the end time and 0 slots as you said and it allowed this. When I scholled down, slots had been allocated under the 9.8p I'd set for my max. Success! Thanks.

                                        Jeff

                                        @admin me too!

                                        Same slot, same issue.

                                        Have just set second 5 slots in 11:30 - 16:00 if you want to check functionality?

                                            Jeff

                                            Is it because the charge instruction was sent after the slot had started?

                                            Ooh - interesting. Is that how it works on Giv? If you set/enable a slot shortly after its start time, the whole thing never gets actioned?

                                            What does your Giv log say? Could you have encountered multiple Inverter Timeouts?

                                              Jeff OK - so we dug into this a little more.

                                              Your charge slot wasn't actioned as we got a Giv Response back saying your inverter was Offline. See logs here:

                                              We just need to make sure we correctly log this so you know what's gone on.

                                              • Jeff replied to this.

                                                  admin ohhh hadn't looked to be honest, just did my usual wake up, see what the battery is charged up to. I don't know why it would have been offline. I'll see if the next charge goes through ok. Thanks for looking into it!

                                                    I've just opted in to today's Savin Session with Octopus. It will be my first export using the WW scheduler