dnb

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dnb last won the day on February 14

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About dnb

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  • About Me
    Building a SIPS panel house on the Isle of Wight, in the muddiest swamp I could find.
    Just call me Shrek!
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    Isle of Wight

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  1. Application is submitted now, so we'll soon see what SSEN will let me have. Anything over zero makes the plan work.
  2. Happily the inverter I referenced is g100 compliant if I get the latest version. The older ones are apparently not. I do intend to apply to see what i will be allowed but I am not hopeful.
  3. Nothing like answering your own question... Is the Solis 6.0kW 4G Dual MPPT any good? It seems to be "about right" for my 20 panels if I stick to this, but I haven't found much information yet about how it is monitoring output except that it's by current clamp. So it could be a fun game trying to work out if the inverter has backed off generating or the sun has gone when it comes to deciding to switch in loads for self consumption.
  4. I would like PV on the roof of my new build. I believe I can easily fit 20 300W panels on the main roof (and I am considering an additional 4 on the SE side of the house). The snag is that I am in a very rural location served by a single phase wire that already has a lot of PV hanging off it from other houses. I already have a 100A supply to site from the house I demolished (parked in a box at the site entrance). Looking on the map SSEN provide, all the transformers in my area are marked red - presumably meaning they're close to their limits. So my large scale PV system is going to meet resistance (pun intended) from SSEN. Apparently I need to make a G98 or G99 application now, not a G83 etc as these are about to be superseded. Practically this seems to change little if I only want to export 3.75kW, other than a bit more detail seems to be required and there is the chance of them saying that I can't. It looks rather more complicated if I want to try to export more and I expect it to be very costly too. So the question is what G100 compliant kit is out there? Is there a nice 6 to 8kW single phase inverter that will monitor output, switch on loads (eg immersion heaters) and throttle output based on "spare" power the house can't currently use (even after all the loads are on) that has the right paperwork so I can put it in my application to demonstrate compliance with whatever power they will let me export? It seems to me that this is quite a new standard so compliant parts are not common yet.
  5. Absolutely not. Unfortunately the billing department are much more pragmatic. 😉 And nobody has to inspect this? Or do I simply photograph it in case it is needed in evidence later like I did with the site electricity supply? Thanks everyone. Looks like this could be another build hub cost saving 🙂
  6. I have an existing water connection on my property that uses the correct sort of 25mm blue pipe. It's connected to a meter at the property boundary that SW installed a year ago to replace a broken meter in the property I have demolished. (We lifted the old wooden shack off the water stop tap, so didn't need to move it!) I have since put in a post to make the tap more visible. Now I need to put in a water pipe to feed the new house. My plan is to reuse the existing water supply pipe and extend it by a couple of meters to the new location. This gets around a lot of planning grief because it means I don't have to work in a tree protection zone. Southern water of course don't want to believe I have a water supply already and are saying I need to apply for a new connection with an SN45 form. This seems to be a route to me paying them £90 to calculate that I need to pay them a lot of money for very little. They aren't very helpful at present. Have I found the right process to follow? All I think I want at this stage is an inspection of the trench and with ducting, pipe & insulation going under the new foundations. But later on of course it will need connecting to the existing supply. The temptation to ignore them is high (based on my work aproach of asking for forgiveness instead of permission), but this is going to be a terrible plan in the long run because they don't seem to be a forgiving organisation. 😉
  7. I'm not sure either. But will it be a problem if there's enough depth of reinforced concrete on the top for the securing bolts and the imposed loads are kept within spec? I can only see it doubling the "point" loading versus a car parked on all four wheels - tyre contact patches are very small when all said and done. It's one of the questions awaiting an answer with the beam and block people. They aren't the most comunicative people around and tend to do exactly as asked, therefore I need to have a bit of understanding so I can ask for the right thing. More RC depth does of course reduce insulation opportunity. I was hoping to avoid too much heating in the garage, but a nice warm floor to lie on and curse my cars does sound pleasant now I'm getting older. I don't kneel too much - it's bad for my knees.
  8. I have a Lotus too. Best double up on the insulation...
  9. The ring beam is 600x450mm of steel re-enforced concrete. The spans are in the main a generous 3 metres each. I trust the structural engineer's calculations. What could possibly go wrong? 😉
  10. The piling crew phoned me early on Monday morning. Can we come to site on Thursday? We're going to be done earlier than planned and we don't want to waste money on the ferry. Fair enough I think - the ferries are silly money if you're moving equipment. It left me a little problem though - the site wasn't graded to the right level and I had no piling mats. They were on my weekend list so they would be ready for Monday when I was originally expecting the piling team. So a few phone calls later and I had my stone order accelerated and had found a very speedy digger driver for a day and a half. I'm still learning the art of grading with a digger and I haven't got time to mess about. Besides, who is going to walk around with the surveying stick saying "a bit more off here!" if I don't? Job one was to complete a piece of French drain along the front third of the southern edge of the property. Due to the lack of dumper truck, we improvised a stone carrier. We skip a few steps now because I didn't have a camera for most of the grading work. The crushed tarmac arrived for most of Wednesday morning and I spread it about until it got dark. I didn't get all of it finished but there was enough flat ground to get a good start on the first few piles. This is after the first 20 tonnes arrived. There should be no surprise that it rained the previous night so I had to deploy a pump to empty the garage footprint lest it turn to a swimming pool. I spent the morning of Thursday marking out the site with a couple of decent tapes and a laser level. It should be good to 10mm or so all things considered. This is (hopefully) adequate for groundworks. The ring beam will cover the multitude of sins, I am reliably informed by the machine operators! The first pile hole being drilled. A momentus occasion - we are finally under way with the build. The plan with the piles is to auger down to 3 metres, through the reasonably clean clay to where it starts to contain a lot of chalk particles and an awful lot of water . The anti-heave sleeves will then be fitted (the most expensive toilet roll middles I've ever seen) and an end driven steel pile will be installed to approximately 8 metres. More drilling and shovelling. The team can work at quite a pace! Even an attack of super moles doesn't put the team off their game. Most of the sleeves are now installed. Little did you all know, I am secretly building a multi-story car park. The piles are ready to be hit with the large hammer on a string. Sometimes brute force is the best way. All piles installed and concreted. Oh and it rained again for a change.
  11. I have a grand plan for a large detatched garage with my new house. Surprisingly the planning department agreed to it, so it would be rude not to build it if the cost over-runs on the house allow 😉 It has to have a beam and block floor due to heavy clay soil, trees and other annoyances, but other than that, I have a pretty clear run at building a 6 metre by 12.5 metre "man cave". I am currently working through my options for the floor. I will be spending time there with broken TVRs - so a comfortably insulated floor seems a good idea. I will also be installing a 2 post lift in one end. The beam and block will naturally be specced with this in mind. I am wondering how much and what type of insulation I should use. EPS200 seems a sensible choice from my limited reading so far. (I can't see me converting the garage into a dwelling so I wasn't going to allow for this other than saying the effective ceiling height would easily allow a second floor to be laid) Any pointers gratefully received.
  12. Zones 1 and 2 are still up to 2.25 metres high in my 18th edn book. Here's the zone description from the book of words:
  13. I think a solid state differential pressure sensor like a MPX2100DP, or a lower pressure alternative like MPX250DP would be easily good enough to see the pressure difference across the valve. The differential element is nice because only the pressure difference matters to the sensor - you aren't having to calibrate two sensors measuring absolute pressures. You can still drive them easily enough from a microcontroller or Raspberry Pi etc. (I used one once to make a high accuracy tank level sensor). The maths to calculate airflow is easy enough too. More or less the same as some aftermarket car engine management systems I've played with. I think I too will be following the example when I've got something built above ground.
  14. Good call. The floor needs approx 1000 blocks. The wall build up is small in comparison.
  15. Day1: The diggers gather like vultures. The old bungalow is doomed now with only one more day of asbestos removal on the inside. The driveway can't be finished until the rain stops. Day 2: Half the house appears to have gone! It seems there isn't much to it that isn't rotten. Another view of of the half-a-bungalow. Skipping a day to day 4: All the house down with the wood awaiting collection. All the asbestos roofing felt has been stripped and removed from site. The pine floor (front of frame) is retained because I can see uses in the future. Day 5: Site graded and ready for building the new house. The tall house in the background is a neigbour's self build from 10 years ago.