Ill also incorporate the monthly update for December in the mix.. So stay tuned, Hi John here, thanks for tuning in., If youre watching this in early January well and Happy New Year to you., If youre not, then perhaps its happy Spring happy Summer, happy Autumn, happy Winter, whatever., Ive split this video down into chapters and you can See that in the description down below under the video, if you want to skip to a particular section., Also in the description and now on screen, are the details of our system for those who arent familiar with our setup. Im, going to start off doing the overall Totals for the year 2021., Its worth stating actually at this point that theres a 6 variance in favour of what the Tesla app reports against what my two solar PV generation meters report. The generation meters, are more accurate. However, where applicable, Ive included the figures from both sources to allow me to show all the data sets as the generation meters are only going to show PV solar generation. For 2021, we had the following figures: according to the Tesla Powerwall app. House usage for the year Was 12410kWh or 12.4MW. Ill refer to everything as units from now on its a lot, easier. Solar generation was 6660 units. From the Powerwall we used 3440 units and to the Powerwall was sent 3892 units. That works out at a round trip of 88 efficiency over the 12 months. From the grid we pulled 6210 units and to the grid.

We sent back 600 units., Which averages 1.6 units per day.. Moving on to look at our self powered performance from our solar panels and battery., Our solar generated 53 of our total house energy usage shown here on the solar energy offset column.. We were self powered from solar for 32 of the time.. We were self powered from the Tesla Powerwall for 27 of the time. During our peak rate time, slot 81 of the time we were self powered either by solar or the Tesla Powerwall battery. During the off peak rate time slot 9 of the time we were self Powered by solar, Tesla Powerwall. Remember the off peak time start is during the night time, which means no solar activity and frequently the Powerwall would have been charging during this time slot. So hence the low 9., The difference between the 2021 self power percentage during peak and off peak from those in 2019 and 2020 can be explained. Thus.. We were on the Octopus Agile tariff from July 2020 through to the beginning of August 2021.. This has a 4 hour peak slot with a 20 hour off peak slot. From August 2021 onwards, we moved on to the Go tariff, which has a 5 hour off peak time slot and a 19 hour peak period.. This explains the variance between the 2021 figures and those for 2019 and 2020. Were basically not comparing apples with apples. FiT Feed in Tariff payments for the year total 2294.

. This was almost bang on the average yearly payment over the past 10 years.. We have another 15 years of payments to come as weve signed up to the 25 year FiT scheme when we initially got our panels. Lets balance this against what our system has cost us to date.. Our 4kW array installed in 2011 cost us 15 225.. The Tesla Powerwall and the myenergy zappi installed in 2018 cost 7141.. The myenergi eddi installed in 2019 was 375.. The 2.34kW array installed in 2019 was a 5795. Which gives a grand total of 28536.66.. Our FiT payments to date are 22’2.. The difference is actually 6144 adrift. And Ive worked out. That will break even in 2 years and 7 months, based on the current rate. And remember that the FiT payment is paid just on the generation total for the 4kW array.. We receive no payments for the later additional array that was added.. This chart is the annual FiT payments for the previous years.. As you can see, it varies between 2000 and 2500, depending on how much solar is generated from that 4kW array., Our FiT payment is paid quarterly and actually very promptly. I might add, by EDF. – And here is the 4 quarterly payments over the years from 2020. … 2012 trouble with dates today: Okay thats, our yearly data.. I dont have a total of how much we spent on electricity, although I do have it on gas., Although its not 100 accurate Lets just bring up on screen.

So you can have a look see what Im talking about. Gas, … gas, … gas … there. It is and the reason its difficult to work out year on year, because my last bill also my first bill – starts on the 30th of November 2020 and runs through till April 2021. And then the other bill is right. At the end of the year runs up to the 4th of January., So its not too bad just a few days into the new year. But our total gas usage over that billing period is 740.51., Its probably at least 150 less than that, because weve got the whole of December 2020 included in that first bill, total of 412.85., So its near enough And as you can see on screen its …, you Could probably work it out if you really wanted to. In terms of electricity.? I cant give you that, unfortunately, because I havent been billed up to date.. Currently, the last bill from Octopus energy is on the 4th of August 2021. And thats, where we moved from Agile to Go: Faster. And theres, some meter swapped and all that malarkey, if you remember., But it means that were missing some meter readings so waiting for those Bills to come through for the last 4 months., So I cant really give you a sensible figure on that., So thats the yearly data. Before I move into Decembers data. If you have any questions, then drop them down in the comments below.

, And let me know how you got on for the year.. I guess I was impressed with the fact that solar offset our energy from the grid by 53.. Our electricity bills would have been 53 higher without solar and, if we just let that sink in for a minute, with the current situation, with the escalating energy bills that we were seeing couple that with a home battery, which also added a further 27 to our self Power over the year, you can clearly see that solar and a home storage battery works in the UK over the course of a year. Lets. Have a look at the December figures shall we.? These are very poor.. Its yeah see how everyone else got on, but I think its a similar story. Lets bring up the first chart. Our 2 solar arrays produced 112 units during December., Only just beating December 2018, which was 108 units.. However, in December 2018, we only had a 4kW array of panels on the roof and not 6.34, as we have now.. So yes, its even worse, when you look at it that way. In terms of the split between the 2 arrays 70 units came from. The 4kW array and 42 units came from the 2.34kW array. And then you can clearly see if you skip across to December 2018, where it says 108. That was all from the 4kW array, whereas 70 from the 4kW array December, just gone. Solar and the Tesla Powerwall provided 38 of the power during the month for self power and, as you can see, the lion share of that came from the battery.

. This would have been charging overnight on cheap rate electricity, as there was very little in fact, probably no surplus sunshine to charge the battery and power. The house. This year on year chart bring that up on screen. So you have a look at that.. Looks at the past Decembers and its really telling. From 2019 onwards, thats for both arrays. Before was just the 4kW array. December 2015 just creeps into the lead as being the worst December on record. However, if you were comparing light for like system sizes, then 2021 would be the worst and sprint passed it to the finish line, claiming the crown of the worst month ever at 70. Units for the 4kW array, The day by day for the month, is a sea of red and blue.. It really visually demonstrates how little solar activity we had. 1 day at just under 20 units for the day. 4 days between 5 and 15 units.. We did actually manage to generate something every day and I know thats not been the case with other solar watches that I follow. We did have 7 days where we generated less than 1kWh for the whole day. Our worst day was actually December. The 25th, where we generated 100watts on that day, We started generating at 1025am in the morning, and it was all done and finished by 1305pm in the afternoon. When we had a peak of 500watts at 1300pm., That was a really grey December Christmas day.

. So not surprisingly, our grid usage was up in December and this chart shows our average grid usage and house usage over the course of the month. Average daily house usage was 45 units with 43 of those units coming from the grid., We sent 13 units back to The grid in December and which is good. Its really low, so thats a little ray of sunshine in a sea of gloom., We pulled 1345 units from the grid in December, which is a bit of a record., Not one. I particularly want to celebrate to be fair. However, you know no sunshine means more grid, pull if ones daily. Lifestyle and pattern remains the same. Look at the eddi. The myenergi eddi heats our hot water from surplus sunshine., So it had a bit of a rest in December. 3.2 units over the month, bringing its yearly total to 353 and its running accumulated total to 820.. The Tesla Model 3 covered 1099 miles during the month, bringing its total year end mileage to 16991 miles., Almost 17000 miles.. The Kona covered a massive 133 miles during the month, and its total mileage was 13715.. We no longer own the Kona as of early January. Thats, a video Ive actually just uploaded on the Hyundai buyback process for the Kona.. So if you want to see that go and have a look at that, because it gives a lot more information than Im going to share here., You can also see the yearly totals for the cars so 8821 miles covered in the Tesla versus 3013 in the Kona And, based on these yearly mileage figures, we decided to get a much smaller second hand, EV to replace the Kona with a smaller range.

Rather than have 2 expensive, 300 mile range EVs sitting on the driveway., Well use the small EV for frequent short trips to the shops post office drop into town. That kind of thing and weve actually already purchased it. Ill reveal what it is once it arrives in the next week or so. 28 of our annual home EV charging came from sunshine, which equates to 775 units saved of electricity., And if you took a UK average Unit rate of electricity and 19 pence per unit and thats saving 150 in electricity costs over the course of the year. Yeah thats it. I dont want to take this too long and to rambling. So thats, our 2021 roundup and our December stats as well.. Thanks for watching as always and Ill see you on the next video.