DamonHD

#NotAllLithium The bulk Lithium batteries that I have used / am using are LiFePO4 which do not tend to do most of those nasty things: AFAIK the electrolyte is the problem in Lion laptop/phone batteries. Rgds Damon

FWIW I run my router (12V) off-grid (ie from off-grid PV and storage) automatically when possible. https://www.earth.org.uk/expanding-off-grid-PV-system.html Rgds Damon

Interestingly, while the supply meters say my Enphase is doing that job relatively well, my Eddi metering dsiagrees quite substantially, though does its own job reasonably well. (This is the old banking joke about if you don't want to have to do reconcilliation, don't record more than one stream of numbers.) I'm starting to assemble side-by-side streams here to enable better comparisons: https://www.earth.org.uk/energy-series-dataset.html So still can't help you I think, though I am prepared to add sponsored equipment under test in principle! As to battery life, other than abuse (pushing to close to or beyond limits), I basically assume both calendar-life limits AND effective full-cycle limits (whether taken piecemeal or not) for both LA and Li chemistries. But what do I know? Rgds Damon

I definitely know of one unratcheted meter that the FiT administrator has been told about that hasn't been replaced, but the system isn't big and maybe the cost of replacement was considered too high. No, it's not mine! Rgds Damon

@SteamyTea Cascading system would be the right way to do it, but I suspect that many users would fail to distinguish needs from wants well. @markocosicI don't understand your question, or don't know the answer, or both! Rgds Damon

Some mechanical meters do run backwards.* Ofgem is very unkeen on this type of uncontrolled net metering as I understanf things, because in part your PV spill provided to the grid unbidden is not worth anything like retail rates to the grid. Some mechanical meters have a ratchet to prevent running backwards. *Some of the older unratcheted ones catch fire. Another reason not to do it. I have been through both in my installation. I now have an import/export pair, which also means I can work out what I'm actually consuming. Rgds Damon

Why do you believe that a Sunamp wouldn't allow similar overcharge? Rgds Damon

Gas use for the whole of April was just over 1m^3, so ~0.38kWh/day. Thus a 90% reduction in direct gas burn. Result. https://www.earth.org.uk/note-on-solar-DHW-for-16WW-UniQ-and-PV-diversion.html#2022-04-30 Rgds Damon

Yes @SteamyTeaall the ratings in the EU and UK just got reset so that A means 'best' again (rather than A++++++++++++++++). Rgds Damon

The meter may itself be using something getting on for that 6W... Rgds Damon

I'll get a better view at the end of April, but gas use is now about 0.5kWh/day, and will go lower if I can train my family not to whack the hot tap full on for 30s use (where hot water doesn't even get to the tap!)... https://www.earth.org.uk/note-on-solar-DHW-for-16WW-UniQ-and-PV-diversion.html#2022-04-11 Also these may be of interest: https://www.earth.org.uk/eddi-diverter-dataset.html https://www.earth.org.uk/heat-battery-topup-dataset.html Rgds Damon

You are meant to talk to your FiT administration before installing storage, eg to confirm whether you intend to allow exports from storage to the grid. Rgds Damon

Then they are breaking the law, ie not operating VAT correctly. Rgds Damon

Just for the record on this thread: the Sunamp Thermino 150 ePV and myenergi eddi are in and running, though we're not getting enough sun to give them a good workout yet! A reminder of the full write-up link: https://www.earth.org.uk/note-on-solar-DHW-for-16WW-UniQ-and-PV-diversion.html And here is a live chart to keep you all on the edge of your seats: https://www.earth.org.uk/_heat-battery-target.html Thank you all for your advice along the way! Rgds Damon

In my installation I have a myenegi eddi. https://myenergi.com/product/eddi/ Rgds Damon

Just had a Thermino installed in the last few days: all working out as expected so far! https://www.earth.org.uk/note-on-solar-DHW-for-16WW-UniQ-and-PV-diversion.html#2022-03-09 Rgds Damon

Yes, all energy flows recorded and analysed in excruciating detail, eg: https://www.earth.org.uk/saving-electricity-2022.html Without any of the storage or PV etc we'd be a low user for gas and electricity on Ofgem's scale. Rgds Damon

Our Thermino 150 ePV went in yesterday. https://www.earth.org.uk/note-on-solar-DHW-for-16WW-UniQ-and-PV-diversion.html#2022-03-09 This evening after dark, my daughter had a shower and my son had a bath. All but a fraction of a kWh of the DHW covered from the Thermino: the combi cut in for the last couple of minutes of the bath fill. Since we also turned our central heating off the day before, I'm hoping that our gas consumption will be much much less than usual this month onwards, at least until circa September. Rgds Damon

I have Enphase: https://www.earth.org.uk/Enphase-AC-Battery-REVIEW.html Rgds Damon

You might have an opportunity during this process to choose new rads that allow your existing (or a new) heat source to run lower-carbon too. Rgds Damon

The Sunamp's own control supply must be permanently wired. The Sunamp's heater supply should be via something like a myenergi eddi for diversion. I will also be using the eddi under software control to top-up 'off-peak' in winter mainly. See my lengthy page above. You will need different a Sunamp model if you want to provide a second (non-electric) heat source to it. Rgds Damon

That's good for maximising summer (and overall) generation in the UK with south-facing panels. If you want to have the least short-fall / best putput in winter then the optimum angle is much nearer vertical as described above for south facing, or likely much nearer horizontal if facing other than fairly south. Rgds Damon

I have now preconfigured my eddi (the sparks is not due for a couple of weeks) and have regular logging set up: https://www.earth.org.uk/note-on-solar-DHW-for-16WW-UniQ-and-PV-diversion.html#2022-02-06 Rgds Damon

Yes, for off grid. Output is good considering location, but half what it might be because in shadow from the house until nearly noon. Rgds Damon https://www.earth.org.uk/expanding-off-grid-PV-system.html#20160722

I have plonked down some (electronic) cash and have ordered a Thermino 150 today: https://www.earth.org.uk/note-on-solar-DHW-for-16WW-UniQ-and-PV-diversion.html#2022-02-04 Rgds Damon