This video covers our January 2022 performance figures for our solar pv and Tesla Powerwall 2
here in the UK, along with our Tesla Model 3 and our new Renault Zoe electric usage. So stay tuned!
Hi John here and welcome. January has been a bump a month for us and I can't wait to share
the figures with you. I have noticed the solar day starts earlier now just after 08:10am in
the morning whereas in December it was 08:25am was the earliest I recorded. The latest end of day in
January was 16:30 or 4:30pm. Whereas in December it was 15:40, so twenty to four. Those increases
in solar start and end times may not sound like a major shift when you look at daily figures.
However if over 30 days you get 15 minutes a day of extra sunshine that's over 7 hours of extra
generation time during the month. I've also seen our peak generation increase over January as well.
Highest peak from our 6.34 array was 4... was 5kW even! In December our highest was 4.9kW.
So you know first glance you're saying well that's not much of a difference.
However, the biggest change is the frequency of those high peaks.
December saw 6 days where we peaked over 4kW. In January we saw 21 days where we peaked over 4kW
and that really tells you spring is on the way. Well at least in Rushden!
Let's move on to the stats shall we for the month. I'll bring up the graphic on screen
which you can pause and review if you want to. Gives you a complete overview of our system,
size, components all that sort of thing. It's also down in the description down below if you
want to have a ganders down there if you're new. For January 2022 our south south west
facing 6.34kW array produced a total of 330 units. Basically smashed it out of the ballpark! Previous
January's pale into insignificance. 330 units is almost 3 times our December total of 112. So yeah
phenomenal. Our average daily solar generation was 11 units for the month compared to 4 in December.
If we divide our total generation figure for the period divided by the size of our array. So 330
units for the period divided by 6.4kW worth of panels works out of 51kWh/p. How did you all get
on? Did you manage to get a good month too? Please drop your comments down in the... drop your totals
down in the comments below and your comments down in the comments! Yeah that's aptly named.
So look at both arrays our 4kW array produced 207 units and our newer 2.34kW array produced
123 units. No discernible drop across either array looking at those numbers their percentage
contributions the overall is spot on as we'd normally expect. This chart looks at our overall
contribution of the Powerwall and solar to our self power. As you can see there we were 43% self
powered for the month, which obviously is expected to go up and is certainly up against December's
total. A healthy chunk of sunshine in there too making up 13% of our total. Again higher than the
last 2 Januaries looking back at the historical data. But not quite pipping January 2019 at 17%.
However, in volume terms 2019 total just had the 4kW array so would have generated less overall.
Which actually brings us neatly onto the year on year chart. This tells a tale doesn't it.
Towering high and proud is January 2022 at 330 units. Streets ahead of anything else.
The equivalent of new car sales for EVs over ICE cars in the month of December!
So yeah really pleased with that hopefully that is the continuation of things to come. This chart is
our Powerwall in and out. What we were able to put into the Powerwall versus what we pulled out.
Our round trip efficiency is the same as December 87%. 500 units in and 434 units
out during the month. Looking at the day by day chart. Our house usage is shown in blue.
The real high peaks there are when we charge one of the EVs. As regulars know we run one of our
glass kilns every day during the off-peak period which adds about 6kWh minimum to our daily house
usage total. Sometimes when the sun is out we'll also run a kiln during the day as well and get
that second firing just purely on solar. So a free firing in effect. Red represents the energy we've
pulled from the grid. The constants there are one glass kiln running cheap overnight on the cheaper
electricity and also the Tesla Powerwall too charging during the same period. We also heat our
hot water at this time rather than using the gas boiler. Trying to reduce our gas usage even though
you know electricity is slightly more expensive. We're 5.5p per unit of electricity at that cheap
rate compared to 3.76p per unit for gas. There's not actually much usage for heating
hot water in terms of electricity usage. Probably 2 units a night or so 14 units for the week. So
sort of small change really in the big scheme of things. Solar generation is shown in yellow. It's
certainly more healthy than it was in December where it is all but lost in the day by day chart.
11 days where we generated less than 5units in a day. Meaning two thirds of the month we had
really good generation and I think that's what helped us get that total. It was just
sort of consistent over the course of the month with 12 days over 15 units of solar generation
in a day which was phenomenal. Export to the grid was low again this month shown in orange.
I try and keep the export as low as possible. We don't get any payment measured against the
amount of units that we export like a SEG tariff or Agile Outgoing tariff therefore for us it makes
sense to utilise as much of the generation on site rather than let it go to the grid.
Just for fullness there we get a Deemed export to 50% of what we generate on our solar panel
on our 4kW array. We get 50% of that total as a deemed export which is part of our FiT scheme.
Not massive amounts about £9 a quarter or something. So
it won't keep us in bread or anything but there you go. Looking at the totals. This
chart has the 4 data sources that we've just looked at in the day by day. House usage there
is perhaps the key one to focus on at 1.5Mw or 1,536 units versus our solar of 330. It's a 21%
offset according to the Tesla app. i.e solar produced 21% of our house energy needs.
And we'll look at the grid ones in a little bit more detail over the next couple of charts. This
is our daily average house usage and our average daily grid usage over the period of the months.
Not surprisingly our average daily house usage is up here, 50 units. Nice to see that a drop down to
41 units from 43 for our pull from the grid which is shown in red. This chart shows what we sent to
the grid. 21 units in January sent to the grid and as I've said before by and large that's sort of
just a little bit each day so 500 watts 700 watts or so which sort of tots up over the course of the
month. This is what we pulled from the grid. 1.2Mw or 1,263 units. I can give you the pricing on
that in a minute, exactly how much that cost and also the gas usage for the month. I've actually
got the bills in which is why I'm a little bit late with this video. I shall bring that up at
the end so you can see what's what. Moving on to the eddi. We did actually managed to divert some
energy excess solar into the eddi to heat our hot water. Almost 10kWh over the course of the month.
That brings our running total, obviously for the year as the same 9.82. Overall accumulative 830
there. Rounds up the figures and savings to date £60.96p from installation date. On to the cars.
Obviously the Kona is gone now so that went in early January. We're now on to the Zoe.
The Zoe did 199 miles during the month and is now on 25,375. You can see we just picked it up
and when we got it was just over 25,000 miles. In terms of charging at home it cost us £2.54p.
We did 2 public charges in the Zoe, which were a quick short blasts just to make sure it worked
where we added 3.2kWh. So yeah that's the cars really.
I said I'd share our costs for gas and electric. This is our gas
for the month of January. 5th of January through the 29th of January which is 25 days. 201
cubic meters of gas total of £90 pounds give or damn, with a unit rate of 3.58p.
Electricity was slightly more difficult to work out because we had an electricity bill but
unfortunately it covered a massive 171 days! From August of last year through to almost the end of
January 22nd. So I did get the bill but obviously it doesn't break it down there on that summary.
What I've had to do is go through each day on the bill it breaks that down day by day and this is
what I've worked out for January. Kilowatt hours used total of a 1,097 almost 11,100kWh. Cost of
£118 with the average unit rate of 11p. If you add the 2 together it's £200 or £210 pounds for
gas and electric for the month of January. There you go. Any questions dive down into the comments
and I'll pick those up. As ever; comment, like, share. All those good things helped my channel
grow. Thank you for watching and I will see you on the next video. All right take care bye.