Solar Power and Battery Storage


Roof top solar power installations are becoming a truly viable option for domestic households as prices tumble. Millions of homes across the UK, Europe, and around the world have already had systems installed providing them with clean and free electrical power from the great nuclear fusion reactor in the sky.

Here’s a step by step guide to how to get started and a bit of detail about the system I chose for my own home.

Here’s the link to the cost document :-!AnTrBJbiiu1NlFbWi92G8A3KdmOu

This one is the EV Opinion Programme

And this one is Fully Charged

Finally, this one is for ISO Energy

49 replies
  1. pasoundman
    pasoundman says:

    So, basically you're relying on the grid for your winter (and much of your spring and autumn) energy needs. What powers your space heating ? I'm assuming it's gas. 3kW is tiny compared to a typical central heating boiler's output. Your batteries are most likely undersized btw.

  2. Purplefox99
    Purplefox99 says:

    Great video, it answered a couple of questions I had about the economics. It's August 2019 and I have a quote of £9.5k including VAT for a 3.5kw panel systems with 6.3kw battery storage. This'll be in before the VAT hike on renewables to 20% in October. I've got my eye on a Smart Export Guarantee tariff as well, with your formulae I'm looking at an RoI of 16 years. I'm having Sunpower 21.5% efficient 350w panels with 25 year warranty and Solax battery with 10 year warranty, I'm also installing a MyEnergi Eddi, Harvi and Hub so should be able to make further savings by heating my hot water with solar power instead of gas. 🤞

  3. Paul Edel
    Paul Edel says:

    I wonder which of the current worldwide fossil energy giants will become the Nokia of the energy world. With all the denying going on, in spite of everything being right in front of their eyes, that might make for a very interesting YouTube episode. I bet there will be more than one.

    The same thing can be said for the major auto manufacturers. It could be a separate episode or combined into one long one.

  4. Raz Patnaik
    Raz Patnaik says:

    I am concerned about the no. of Solar Batteries I may need & Back-up capacity.

    My house has electronic appliances which in total consume 8.5 KVA.

    For a backup of say 5 hours how many batteries do I need?
    And is the backup hours calculated by assuming that we will be using 8.5 KVA during the period?

    We know that the the length of the backup depends greatly on how many appliances we are using. Does this mean if I switch on just 3 Fans and 5 Lights, the batteries will give me hours and hours of backup?

    Can you please enlighten me on this matter?

  5. Fortnite Vids
    Fortnite Vids says:

    The losses due to age and deterioration…pv panels are only what, 20% efficient in the conversion of available solar energy? So its downhill from that, not 100% down to 90 something I should think.

  6. Tom Eli
    Tom Eli says:

    Great video and well presented, reading the comments of minor corrections by others is frustrating People eh? Nowt as strange as folk. I also have adopted solar and battery storage and point to note that I did not realise at time of install is the stated battery capacity, the 4.8kw system is not a true storage capacity as the charge controller will not allow the battery to charge over 90% and discharge below 10% leaving only 80% of the advertised capacity it’s called Depth of Discharge (DOD) and protects the battery from over and under charging. I find now that my usage is matched and complemented by the battery system of 9.6kw giving 7.68kw of true storage. On fair days the battery is satisfied between 1130-1400hrs and will provide power throughout the evening for 3 adults. So for approx 3-6hrs per day I have surplus energy and have calculated that the greatest return of investment will be to replace the fossil fuel car with electric if I can afford one but not at the moment so the next user of energy is hot water and planning to fit a storage (15kw) tank to heat domestic hot water and offset my gas bill by utilising my excess PV. If any of you reading this and have an immersion heater system even if it is primarily heated by a gas boiler closed circuit then consider fitting an Immersun controller or any similar device as soon as you can as it diverts any excess PV up to 3 kwh to your immersion element, for me this should satisfy my families need for hot water for approx 8 months of the year.

  7. Keeping It Real
    Keeping It Real says:

    I think the post install is still 5% vat theres a reason for it but cant remember.
    I am having a powervault 3 added and that's showing 5%.
    Btw I got a 4kw solar In roof installed for £5985 inc vat in April.

    I have a 30kw Leaf and that has reduced our commute fuel cost from £250 a month to around £40 .
    By changing to octopus agile and a Ohme cable, I expect to nearly halve the electricity cost .

  8. Doug Mcdonell
    Doug Mcdonell says:

    The cost per kilowatt of storage is much cheaper with a hot water tank. Spending three thousand pounds to store 67 pence(4.8×14) worth of electricity in a battery is not a good idea.

  9. stefflmrk
    stefflmrk says:

    LOVE IT and don't we all wish those lying global players (incl. Governments and others making BIG $£¥€ on fossil energy ) on what renewable energy will mean to us all in the future would get there big payback for NOT saying what the plane truth is!! Love this Video 👍🏻👍🏻👍🏻 Well illustrated, so the last ones would understand to re-think in many ways!

  10. Pavel Fedosejev
    Pavel Fedosejev says:

    Unfortunately, the ROI on solar in the UK is crazy long. I was very excited initially about installing a solar, however, looking at installation prices it is just not worth it. It worth only if you DIY it, which is not possible for the house unless you're certified etc. And if someone says it is to reduce his carbon footprint – there are more effective and cheaper ways, which will actually save you money like a used electric car and use green energy supplier…

  11. grindupBaker
    grindupBaker says:

    This is good because a "Lorne Mccuaig" who has studied the Arctic Ocean energy balance for years and has expert calculations has promised to give me 2 sets of his calculations so we can finally figure out this Blue-Ocean-Event (BOE) thing and stop just babbling about it. Isn't that great. Several of you (certainly Mister Think) might likely have done these 2 following simple calculations yourself so you could let me know your 2 resulots please. I need +/- 5% or better to be any use as mine is all +/- 3% uncertainty. Thanks.
    Actually, you've clearly thought about this so you'll be able to answer 2 questions I can't get quantified since I been pondering it since August 2018. The 1st I might resolve but the 2nd looks really intractable. I computed +5 degrees for the Arctic Ocean surface (so -1.8 degrees late June warms to +3 degrees late September) if all ice is gone but I'm thinking maybe closer to 6 degrees. Questions for you to answer are:
    1) Did you use August 1996 Overview of Arctic Cloud and Radiation Characteristics by Judith Curry, William Russow, David Randall, Julie Schramm for clouds or did you use Trenberth's global average 23% ? and how did you change these clouds with open water ? I've been pondering that for months. Give me your own calculations & I'll plug them in. As you know that's a massive 33 w/m**2 difference for the 180 days summer average insolation at 76N.
    2) The big one. As you know the entire Arctic Ocean is a massive 92 w/m**2 short on its solar radiation for the 180 days summer (when Sun is above horizon) to hold temperature as high as 0 degrees through those peak 6 months of warmth so the lower latitudes provide that 92 w/m**2 to make up the difference to hold Arctic summer temperature at 0 degrees (else it would plummet to -33 degrees through the Arctic summer. So how much of that 92 w/m**2 did you compute will be held back by the tropics to warm the tropics when the Arctic Ocean surface has warmed by a massive 6 degrees in a few decades ? That's the one I'm really struggling with so just give me your own calculations that you've done for that & I'll plug them in. Thanks.
    ps: I assume you used 20 m and Hadley mixing. Did you used 20 m and Hadley mixing ?

  12. MondoTV
    MondoTV says:

    If I told you that adding a battery was actually increasing your carbon footprint in a grid-tied system would you believe me? (and that’s even ignoring the carbon footprint in manufacturing the battery). Check out this article frim SolarQuotes which cites a US peer reviewed study on home battery systems.
    Bottom line – unless the solar is export limited or would have gone to waste anyway it’s less efficient to store it in a battery and use it later. Something to think about eh?

  13. Jon Beale
    Jon Beale says:

    Thanks for a nice video. Have you calculated what the battery bank payback would be on its own? I have solar panels and the payback is about 7 years. I feel that 'subsidising' the batteries from the solar PV RHI payments isn't showing the true battery bank viability (or not).

  14. Veronica Harris
    Veronica Harris says:

    Hi, Thanks for your video. I live in SW France. and have tried to find installers and suppliers. was even thinking of going the EDF way. feed in tarrif. But would rather be off grid. Do you have any info for well renowned companies that install in France?

  15. Paul Djerassi
    Paul Djerassi says:

    Excellent video covering all aspects of home electricity generation at one point you mentioned Photovoltaic panels why ?,your panels look very like Monocrysteline units to me or am i wrong ,Paul

  16. Willoughby 1888
    Willoughby 1888 says:

    Another aspect regarding the 'pay-off' time thing. Lets say you install this system and pay it off in fourteen years. It's yours now and free energy for awhile. But if you don't install solar then for 14 years you're paying the electric company and getting nothing but more bills after. Why isn't everybody installing solar! It's just not sane not to.

  17. Tim Tam
    Tim Tam says:

    Nice video though I'm rather jealous. We have 2 EVs and it would be great to be able to charge them via solar. We're on a 100% renewable tariff, so the end result is the same, just no payback. We still save a fortune compared to paying for petrol and I haven't been on a forecourt for over 3 years now :-). Btw, I have an idea for a related video – why are new houses in the UK, still built without solar? 450 houses have just gone up near where I used to live and not a single one of them has solar. With a proportion of the cost of retrofitting a system being the installation and the benefits of bulk buying, the additional cost to these properties would have been minimal. I can guess why this still happens but have you ever thought of doing a thorough investigation and a video on your findings?

  18. Ted Rees
    Ted Rees says:

    The orientation of panels is more complex than just south side. The good thing about south side panels is that the production in winter is maximized. But in summer, the sun rotates from NE to S to NW. In this case having west or east facing panels gives a long day of solar production. Unfortunately, E and W panels don't produce well in the winter. Except if the slope of the roof is low. Panels level to the ground have no seasonal preference, because they are not sloped. …. It is a good idea to consult with a website that calculates the monthly output for your area and panel orientation.

  19. David Armstrong
    David Armstrong says:

    I think your videos are really well done and I bet you will have 25k subs by the end of this year! I built my own hybrid solar power system about 2 years ago and I have been learning how to get the most out of it over that time. What I have found is that it's best to USE (not store or sell) the power when it is generated (primarily from 10am to 4pm). Try to run everything during these hours and nothing outside of these hours. In your case, your not home during the day but your appliances are. Use the built in timers or put them on timmers so they run when the sun is shining. Just heating your water during these hours can burn 2-8kWh/day. A 50 gallon water tank is equivalent to a 4 kWh battery that is 100% usable or a 20kWh battery that is 20% usable (FLA). Washers, dryers, dishwashers, water heaters, AC units, heaters, pool pumps, ect. can all run on timers only when the sun is shining. Ooops, gotta go, it's getting dark… 🙂

  20. Colin. 1
    Colin. 1 says:

    I’ve had a system fitted about 5 months ago by a brilliant small company in the south east. My system comprises of 12 east, 6 west and 4 south facing panels the panels are 290 watt Spanish panels and a Solar Edge inverter, I also had fitted an Zappi charge point for our car and an Eddi which converts solar energi to heat our water through the existing emersion heater Zappi & Eddi are manufactured by a British company called A brilliant company .
    The installation in total that’s 22 panels, inverter, zappi car charger and Eddi hot water heater. Came to £ 9,000 plus £500 grant from the government for fitting the car charge point. Which I thought was brilliant value. Since installation I’ve heated all our water and in the last three weeks charged our new Hyundai Kona Battery electric vehicle. That as well as receiving our fist payment from our electricity company of about £38. That amount was for the winter period when there’s not a lot of sun about. Now I’m beginning to see move power from our solar panels I’m going to have a lithium battery pack fitted so I can use more of the electrons of an evening. Oh I’ve also fitted to our 2 bathroom towel rails 300 watt conversion elements that use spare energy from Eddi once the HW tank is heated. Our total investment in solar mean for us a reasonable return on money, that otherwise in the bank was getting 0-5% interest.

  21. markdelej
    markdelej says:

    Surely the batteries don’t last 15 years? So if say the batteries last 10 years then it will be another £3000 every 10 years, so how will you ever make your money back?

  22. Stephen Palmer
    Stephen Palmer says:

    Very interesting presentation. Wonder if anyone can advise how they view battery storage and consumption data on the app. For some reason our app is only showing generation data. Any feedback gratefully received.

  23. David Brettell
    David Brettell says:

    Shell..Hmm.. Maybe they are going green now because they know their profit making fossil fuel days are numbered, rather than for any altruistic planet saving reasons. They didn't seem to think any change was necessary in the 80's (Shell Knew Fossil Fuels Created Climate Change Risks Back in 1980s, Internal Documents Show – Shell to me is synonymous with "Spill". Think Shell, think Spill.


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