I’m a bit of a hippy. It’s no secret. I juggle, I have multiple pairs of harem trousers, and am currently sporting an undercut. I’m also a bit of a capitalist though, so when I installed solar panels on my house in 2014 it ticked the boxes of reducing my carbon footprint (over the lifetime of the panels, there is obviously an environmental cost in the production of the panels just as with my electric car) and being a sound investment.
The cost of battery storage solutions has come down since my original install and with the launch of the Tesla Powerwall 2 I figured I had better revisit the situation and see what was up. I have a 1.96kW PV install, and over a year I generate on average 5.4kWh a day, of which I export 4.1kWh (though the feed-in-tariff assumes I only export 50% I actually export around 76%). I obviously also have to import electricity on those occasions when the sun is not hitting the panels hard enough (so, at night), which I currently do from Ecotricity (a bit more costly, but they generate from renewables themselves and it gives me access to their rapid chargers for my car).
So I fired off a couple of enquiry emails to local installers of battery storage systems and received responses the same day (good customer service there). The second company just pointed me at their twitter and facebook pages and didn’t give me any idea of an installation cost (which is what I had enquired about, points lost there), but the first company Ecocetera sent me back a considered reply (within a couple of hours) specific to my install. They included a summary of the different battery storage systems available in terms of both capacity and cost per kWh over the expected lifetime of the battery. They also included cost estimates including labour and delivery (what I had asked for).
They also prompted me to think about how much spare capacity I had to charge a battery, on how many days per year. All of the battery storage solutions assume the ability to charge on 250 days of the year, so I downloaded the numbers from my install and started crunching. For my specific install I probably wouldn’t be able to keep a larger battery like the Powerwall sufficiently charged up (which isn’t good for the battery), so I would be a looking at a smaller capacity battery. Unfortunately the smaller the battery, the higher the cost per kWh (there are a lot of additional gubbins that go along with the battery to manage it, so it’s not just the cost of the physical battery that goes into the overall cost).
All of this number crunching led me to conclude that given there is an environmental cost in the creation of any battery storage system, it actually makes both environmental and financial sense not to add battery storage to my existing PV system. Instead I will keep buying in electricity from renewable sources, keep trying to use as much of my excess solar during the day (luckily I am in a position to run high-drain items such as the washing machine and dishwasher, and charge my car then), and keep investing in green energy projects locally. It also means I don’t have to worry about where to put a physical battery, as well as saving me some money to put towards my Tesla Model 3.
The London Marathon was finally here, after a lot of training, and the forecast was for cloud cover and middling temperatures (12-14ºC). After the train journey and walk to the green start (which was a fair hike up a not inconsequential hill) it was clear that it wasn’t going to stay that way and it was time to crack the sunglasses out. After dropping the bags at the lorry Jane and I stood in a queue for the portaloos which took up all of the time before it was necessary to get into the start pens.
The 3:30 pacer was in a pen ahead of me, so I took note of the time I crossed the start line (3 minutes 10 seconds after the start) and headed off. Given that the pens are supposed to be divided up by expected pace I was surprised at home many runners appeared to have zero spatial awareness (something that became a recurring theme over the race) and I was cut up left right and centre. In a way this was good because it prevented me going off too fast, but it was using up energy having to stop and start and go for gaps when then came up.
Before hardly any time at all we merged with the blue start where the road was a little wider but it was still hard to get any space to run into. At around 3 miles we joined up with the red a start and hit the first water station, with more carnage as people veered steeply across other runners to get to the water (again a feature throughout the race).
I was happy with my pace through the first 24km or so, it was putting me nicely on target for sub 3:30, but the sun was getting hotter and as we entered the Isle of Dogs the screaming from the supporters was echoing off the buildings and making me feel quite ill. It didn’t help that I seemed to be keeping pace with a Guinness World Record attempt of a two-man Jamaican bobsled, which was attracting a lot of attention. The buildings there meant that you couldn’t trust your GPS to give a true reading of your pace, and I dropped off a little as I went through the toughest miles in terms of there not being much to look at and it being too far out to really start counting down to the finish. I started to struggle to take on any gels, managing a mouthful but not being able to stomach the rest in the heat, but took on water at every station (and still ended up with great salty deposits from how much I was sweating, you do not want to know the colour of my pee when I finished).
There were some nasty inclines and hairpins to get you back headed in the right direction and as I hit the embankment I knew it was going to be close as to whether I would get sub 3:30. I would need to pick up to my planned marathon pace. I gave it all I had, but when I went through 25 miles I knew it would be a stretch. When the 1km to go marker came I knew it was over, but still pushed on to finish as well as I could. My official provisional time was 3:31:19, which is still a massive PB and good-for-age for next year. Apparently it put me in 6549th overall, 918th lady, and 562nd in my age category.
Thank you to everyone who sent message of support, or who supported me through my training, as well as those who came along to cheer (sorry I didn’t spot you Sam).
A final jog out before the big one tomorrow, after a bit of a hike out to Mile End (we were all following Alison who thought someone would yell if she was going the wrong way, we all assumed she knew the way), a rather crowded bit of parkrun tourism. Last week they had under 200 runners, this week they had over 400. I managed to sneak in to get one of the final proper position tokens in 246 having taken it reasonably steady (the downhill’s were fun).
I’m feeling good ahead of tomorrow’s race. I have done the training and now we just have to see what happens on the day. I’ve set myself 3 times that I would be varying levels of happy with:
Bronze: 3:44:59 – this would be qualification for London next year as good for age for my age category.
Silver: 3:40:20 – this would be a new marathon pb (my previous time being 3:40:21).
Gold: 3:29:59 – I’ve been training to go sub 3:30, so anything under that pace would be great. If I feel good and have the opportunity to push on towards the end of the race then I will, but realistically you can’t make up too much time over the last 5-6 miles and I’m more likely to be working on holding to pace than be able to increase it.
It should be fun, I’m nervous obviously (a marathon is always a huge challenge), but excited more than nervous and I have done all of the preparation asked of me. What happens on the day happens (good or bad). For anyone wanting to track me, I am number 30917.
My final run in Bristol as I head off for London tomorrow morning. Just a gentle 30 minutes to keep the legs ticking over. I picked the flatest bit of Bristol I know (apart from the getting there and back), the track alongside the river Avon (not in it as the GPS suggests). Remarkably low on the duck count this morning, but high on the bluebell front. Not long now.
I spent yesterday afternoon following the Boston marathon via twitter and their app, cheering on friends who were tackling the course in some nasty high temperatures. I think that left me a little bit emotionally drained for this morning’s final threshold session as my first rep was terrible (4:47 min/km though it was uphill and the GAP was 4:25 min/km).
The second and third reps picked it up to more respectable paces 4:34 and 4:20 min/km as I revelled in the bright sunshine but cool temperatures. That would do me just fine for Sunday. Just a couple of gentle jogs left now to keep the legs turning over (and stretching, lots of stretching).
The final long run a week out from the big one and a last chance to test out all of the kit, including eating what I intend to and starting at about the same time. This was just 50 minutes of marathon pace after a quick 10 minute warm up and followed by a 10 minute cool down.
It was just enough time to squeeze in the 10k version of the Zombies, Run! spring race, which was confused by Staple Hill tunnel again, but which awarded me a time of 48:13 for the race portion of the mission. I also managed to finish off the rest of the 5k mission (the race part was already over), so I can open up my goodies now and hang my medal.
Trying not to think about next week too much now, I have put the training in but don’t want to get over anxious or over excited before I cross that start line and see what I can do. Fingers crossed the weather holds much as it has been today, not too hot.
I was RD1 at Ashton Court this morning, which featured TV and radio as well as an incident to report (all well, just overdoing it on the hill), so had to do my 30 minutes of easy running after parkrun and after processing the results.
The cloud had cleared by this time, though it was still a little chilly, but I got to crack out the sunglasses for a gentle run along the riverside. I maybe shouldn’t have used my marathon playlist as I went out a little fast (plus the extra adrenaline from being RD), but settled down into a nice rhythm once I hit the flat. One more parkrun to go!
Sleep-deprivation mounted up over the week of the BJC, but after reuniting with the kittens and unloading the car I still had a threshold interval session to do so I headed out to the good old railway path which has been much neglected while I have been away. The zombies, run! Spring virtual race was also live so I decided to start the 5k race after my warm up.
Today’s session was 6 reps of 5 minutes at threshold (heart rate zone 4) with 60 seconds recovery. The first rep was a bit ropey as my legs seemed somewhat uncoordinated, but I soon warmed up into the session and my pace improved going from 4:40 min/km to 4:30, 4:25, 4:31, 4:24 finishing with 4:20. The Zombies, run! app always gets confused when I go through the Staple Hill tunnel so I actually ran further than 5km to finish the 5km race, but was given a race time of 23:47 (though I stopped the mission at 30:12, after I was instructed to stop running). I’ll try and do the 10k race on Sunday in my final bit of marathon pace before London.
I had a day off yesterday, though this being a juggling convention I was considerably more active than I would be on a normal rest day (I even attended two workshops, which is virtually unheard of).
This morning I managed to have a lie-in, and when I did emerge in my running gear I attracted the attention of my tent neighbour, friend and fellow runner Paul. Since I was only going out for a recovery run he decided to join me and it was lovely to have some company for a change. We had a lovely bimble round a little nature reserve, comparing innacurate wrist heart rate readings.
Marathon training stops for nothing. Even though I am away at a festival, which means I am eating too much crap whilst not getting enough sleep or drinking enough water, I still had a marathon paced effort to do. The weather was not my friend. I have a highly efficient cooling system (aka I sweat a lot) so hot and sunny weather is pretty much my worst nightmare and why I spent the last three miles of my first marathon feeling like I was going to throw up every step I took.
I usually make sure I take on water every 10 minutes on my long run, but today under a cloudless blue sky I drank every time my brain thought ‘water’ which was closer to every 5 minutes. Having plotted my route on google maps there were a couple of wrong turns as I made my way to and then round Wollaton Park, but I managed to maintain my marathon pace for the full 90 minutes and was grateful for the many trees along the route offering shade. I can only hope it’s not as hot in London.