I switched to Agile in early March and bought a 9.5 Givenergy battery - no solar. Costs: December: 26p per kWh (on Octopus Flexible), Mar/April: 11p per kWh. For me in winter, that's a saving of £115 per month. And in the last week, with all the negative charges, this dropped to 5p per kWh. It's a no-brainer.
Great video! I'm currently trying to work out if adding a battery to our solar install will be worth the extra costs, but with the prices changing so much right now it's hard to make any accurate calculations. One thing most people seem to be missing out though is the lost interest from keeping £7500 (or whatever sum) in the bank, especially with some banks now offering around 5% interest. Of course if one needs to take out a loan then interest payments also need to be factored in instead. Hopefully with more home batteries coming to market we'll see the prices come down in the not so distant future, so I'm probably going to hold off on a battery for now, even though I'll miss out on the VAT saving from having it all installed at the same time which does suck a little!
An absolutely brilliant video! Thank you Sam. You've simply justified why I went with this exact solution. It makes total sense today, especially if the electricity tariffs continue to increase in the coming years. You've nailed it in the video though, really great presentation.
Octupus go tariffs as of today would give even better payback. What surprises me is that you did not mention that if the customer had both solar and battery installed at the same time there would be no VAT to pay and there for a further big saving. Thanks for the content :)
Look around the Octopus website carefully. There is at least one better domestic tariff than Go. Our Octopus tariff was negotiated in September, giving us 5 hours at 8.25p at night and 39.6p for the standard tariff. we could have arranged for a lower price for a shorter off peak time, but the 5 hours suits us far better. We recharge our EV and home storage batteries at night and hardly touch the mains supply during the remaining 19 hours. Our daily Winter spending has plummeted, compared to our September expenditure and, based upon that very unfavourable comparison, we're saving over £4 per day; about £1,500 per year. Assuming that prices of electricity remain constant (they will not, of course), we'll have saved the cost of the battery installation within about 5 years. If prices rise, as expected, then I anticipate that the installation would have paid for itself long before 2028. We'll be adding PV during that time.
Excellent vid, very useful and informative. £7.5k for 11kW battery is about £680/kw installed inc vat which is a great price/kW. As always oval’s installations are completed to the highest levels of professionalism, a joy to see such craftsmanship. Small matter on the blackboard you got the numbers the wrong way round 😉 bulb “ev” tariff is 10.1p/kWh 2-6am, 39.63p/kWh and standing charge goes up to 44.5p/day. Just need a smart meter. 20% vat on the £7500 is £1500!! 0% vat if solar and battery done at same time. Surely could have put a couple of panels up top for 1500 ready to expand and put that 1500 to better use?? Many thanks for your vid chaps👍
@@philware1546 and not be able to get MCS for export and no warranty on the product / installation? Unless of course you have all the certificates to install yourself
@@MrLegend139 why do you need to export when it's all going into the battery? Warranty comes with the products. Pylontech is 7+ years. Getting some MCS guy to bolt a battery to the wall and connect up a few cables costs thousands and thousands more. You're not going to repay that from the "export" for years. Or if you do, you've got a way too small battery for the PV system.
@@philware1546 Without certification (as required by the electricity suppliers) how do you stop the battery from feeding back into the mains when power cuts occur?
Nice video Sam. You emphasised that one assumption is the battery must deplete fully every day for these calculations. The other critical factor is the difference between peak and off peak costs. Octopus have just announced that new contracts will have a 12p off peak and ~40p peak rate on the GO tariff. There's no doubt in my mind that batteries have faster payback than solar PV, and if people are working to a restricted budget they should consider battery only.
The critical factor isn't whole battery capacity depletion, it's meeting your home's daily consumption from the battery. If the battery only provides 50% of the daily requirement then you'd need to adjust the calculations - saving less. Is you are comparing system capacities then you'd run the calls for each system based on how much they could supply. There will be a sweet-spot between capacity and payback period. BTW our presenter got the last two payback calcs wrong, it's always system cost divided by annual saving, the graphics and his narration showed the opposite.
James is right. You can use a bigger capacity battery, and it is not fully depleted each day, but that battery will cost more which increases the pay back time.
@@terryjimfletcher Our modelling here showed the best ROI occurs when the usable battery capacity was just over half the daily usage. The reason is that it allows you to go onto a cheap off-peak tariff. During spring and autumn you can charge the battery of both grid and solar and summer you charge off just the sun. Winter sucks, but it's still cheaper than not having a battery, and you don't have to buy twice as much battery, they are NOT cheap.
@@TOM-TOM-TOMIt depends on the rate differences. For solar it will depend on what net-metering deal you can get. If your power is only from the gov't options are limited. With a battery, you know you can charge every day so it doesn't need to be more than 80% of daily use. With off grid, the battery has to be much bigger due to lack of sun and winter. My primary concern is that you invest in this and then some oil loving retro-politician wrecks the arrangements upon which you based your investment.
It seems to me that if you can reduce the charging current at night it will last longer. It seems you said there is a four hour low rate charge window that you charge in two hours. Batteries last longer if you charge them more slowly.
Excellent video and a great install. I'd need a 15kwh solution to meet 100% of our household needs each day. The user interface and the data make for a very intuitive system. This seems to be an attractive option for energy storage.
Thank you for this video it was simply and clearly delivered and I have learnt a lot from it, there is no doubt that all property owners will have give serious thought to installing such systems. If we all go this route will the energy suppliers continue to provide the cheap overnight tariffs and we do not want their high cost daytime energy.
Fantastic - you're explanation was great - thanks. Also, as someone at college learning to be an electrician, the quality of your work is clearly exceptional. Well done and all the best. Connor
Your calculations assume 100% efficiency for charge/discharge. What is the efficiency of the charge discharge cycle? Also what is the allowed capacity loss for the 10 year warranty? Should the capacity used for the calculation should be the average guaranteed capacity?
Agree, AC-DC-AC will incur losses of at least 20%. 11KW battery wont be able to discharge the full 11KW. There's also an assumption in the calculations that all of the battery capacity will be used everyday of the year, this is unlikely especially during summer months. And owner is likely to go on holiday for a few weeks, ect. I have PV and would love a battery, but even with that I cant make the sums add up
There’s also the 20% of the 11 KW which is reserved for the UPS just in case of a power cut - so only 8.8 KW is usable, not the full 11Kw. But I like the idea & principle. Atm the Octopus Agile Tariff is not available for new customers because electricity prices have been consistently high but they are becoming more erratic again - so those without an EV maybe it’s one to watch as this system would work very well with a tariff like Octopus, particularly if Octopus start paying the customer £1.00 for every kWh offset from the peak period 4-8pm (not every day though 😉, just on selected days - I guess as an experiment).
If that battery is really fully charging and discharging every day, it's likely to have a horrible lifespan. Lithium ion batteries are normally only supposed to do 80-90% discharge to get full life. The other thing you haven't included is the charging and discharging efficiency. That's normally about 95% or so in each direction. So really you're having to put more than another kilowatt hour into the battery to charge that you don't get back.
Good idea, but be conservative with payback period. Add typical 20% to that payback period to account for battery storage/conversion losses; also after 5 years expect to have lost 20% storage capacity due to battery degradation.
People thought I was mad when I told them the payback on my system. However, the sums are stacking on favour to get a set up like this or even better with some solar which the feed in will also improve. Another great video Sam 👍🏻
It surprises me how folk never compare battery payback with car purchase which will never pay them back (unless they're a taxi driver) We all have different outlooks on life. Cheaper night time electricity is *generally* greener. After 5 (or 7) years, what other investment would yield you 20% payback (after the capital had been paid back)?
@@terryjimfletcher The problem is it doesn't yield you 20% return after 5 or 7 years. The calculations fail to include battery degradation which is currently claimed at ~2% per year for EV lithium batteries. Which is probably based on the fact that most people don't discharge their 60+WHr EV battery fully every day(that's over 150 miles per day or 50K miles per year, the average is only ~10K miles per year). If you take it at 2%(likely more but no data) then after 5 years you're down to 90% usable capacity. It also doesn't take into account that batteries have a cycle of charge and discharge rating. Currently up to ~4k for realistic 70% deep discharge and maybe 2.5k for a 100% depth of discharge. In 5 years you exhausted 1800 of your 2.5k rated cycles. Your battery after year 5(break even) is rated to last another 700 cycles of about 2 years. 10 Warranty does not likely include exhaustion due to wear and tear from over use. That is 18%(90% usable battery capacity so it's not 20% return) return in both years 6 and 7 after which the battery will likely give up. So 36% return after 7 years or ~5% average annual return for 7 years. And that's using the 5 year figures and assuming that the inverter and all other components keeps on going reliably after 5 years. You take the risk that if it takes 6 years to payback then your return drops to 2.5% and you lose money if payback takes longer than 7 years.
That sounds more plausible. The battery costs haven’t significantly changed and I’m not sure where the confidence comes from that the technology will improve. I’m buying an electric van and this is because all my work is local and I have a reasonable chance of powering it on Eco7. I could boast that I am an early adopter like these young enthusiastic people. Or I could recall how my milk was delivered 50 years ago on a float with a pile of lead acid batteries under the floor. Load a modern electric van with heavy milk and see how you far you get? How far we’ve come.
Thanks for the video! I’ve been tempted to look into a setup like this for a while now. Here in Australia I pay 13c/kWh overnight but 47.5c/kWh during the day so that makes it even more attractive. We have solar as well but get limit benefit from the panels as we’re surrounded by tall trees that cast a lot of shade.
Another excellent video. 15p daytime rate and 5p overnight is very low. Lucky customer. Still nice to see the calculation and all anyone needs do is substitute their own tariff.
Good stuff, the maths evolve around the elec companys charges therefore you are held over a barrel as to the financial success. I like the full package; that is with solar to a greater level of independence and kick petrol into touch with a charging point!
worth considering not everyone is solely focused on immediate ROI. The increased stability in pricing against future rises is important to me for example even if payback isn’t super fast. Current high peak rates is helping payback time though but without solar relies on low ToU rates hanging around
Agree. I opted for a 6kwh solar and 8.2kwh battery. On the Go tariff, and it's a nice to have, but like yourself, don't count on those cheap rates being around forever
@@stuartburns8657 its not necessarily about the cheap rates, it's about the difference between the day and night time rates that gives you the savings and therefore the impetus to have the system. If the difference was 1p then it'd be crazy to consider, but if it was 50p, then even if the day time price was £1/kWh you'd still be quids in within 4 years.
Good stuff. I'm sure I'm not the first to point out the maths error in the blackboard graphic though, It should show 7500 / 1062.15 You have this the other way round. The answer though is fine. 7 years. You do this twice. The second time it shows 1405.25 / 7500. As I said, this is good stuff, but going through the trouble of showing the workings-out, then writing it out the wrong way round - that's worse than useless. (not wanting to sound rude).
Good video, there are a lot of people currently having this sort of set up installed due to the energy prices we are currently seeing and I think it will it will pay a huge part in the future in the U.K. Surely though even with a 10 year warranty on the battery system over a period of time the battery will become less efficient and not charge and discharge as well as it should. As the EV market continues to develop new batteries technology such as solid state batteries that can charge quicker and hold charge over great distances, I will be interested to see potentially a solid state home battery system. I think that could really be the future if it becomes cheap enough and readily affordable.
I think the Sodium-Ion batteries coming out next year will be more interesting for fixed storage. They should be a lot cheaper than the Lithium batteries.
@@edc1569 yeah, had a DIY LiFePO4 battery powering my house in the day time, charged via Octopus Go, for over a year now. I was paying £20/month until the price change in Oct.
Excellent video. Have been considering both batteries and solar for some time. Currently have Go for the EV, so to know we just add battery now and solar later is great. Thank you.
Interesting video and echoes my situation. Much though I would love to install solar my property is leasehold and the freeholder won't allow it. I've got a GivE All-in-one with 13.5 kwh battery and now rarely use any peak rate electricity at all! My house is all electric with storage heating and hot water plus I have a Tesla which also charges off peak. Unsurprisingly I can get close to the main fuse (100a) limit if I'm not careful but so far things have worked well. I'll soon be on the same tariff as your customer . The other benefit of such a system is the mains backup. In the event of a grid failure my setup can support house load up to 6kW with a switchover so fast that even my WiFi router stays online!
This now makes sense to me. I currently have 3.2 Kw solar with 6.4 battery, 2x3.2 and although this has saved me money the winter is another issue. My solar would not be enough to charge extra batteries, So charging up on the low rate would make sense
It'd be really interesting on a video like this to see some of the design considerations around the choices made for that equipment. 11kWh/day as a system constraint seems odd if they're having a full 100% discharge every day per your illustration. The other limitation of the charge/discharge rate... I'm assuming that's something which is optional and based on a pattern of household consumption? All new to me - so content like this is fascinating and thought provoking. Good stuff!
These batteries come in units of 5.5 kWh, so it might not be worth it (to this customer) to add another 5.5 kWh (capital cost) and charge it from the mains (current cost). Although they might save a little extra on days when the 11 kWh is not enough.
Octopus Go is four hours of cheap electricity so if the max charge rate is 4.6kW then 4 x 4.6 = 18.4kWh so that would he as large as you would want to go in terms of storage.
I have Economy 7, (7 hours of cheaper electricity) but hard to shift usage to those hours. The consumption during night hours hardly comes to 3kW. Where daytime is 8-9 kW. That's why this this installation looks lucrative. The difference between tariffs is 30p . So that brings payback down to 7 years.
By putting the battery on a floor isn’t it in danger of introducing damp or possible exposure to water ingress if the floor is washed? I’d prefer it sitting on a kind of rubber riser blocks, just an idea.
Nicely done. However, show the true finished results. The customer’s utility bill is what’s needed to see “actual” results. That’s the final proof of concept. Cheers. Bang on job!
15p daytime tariff… how long ago was this shot 😅 still very informative, I love seeing that stats on all this, been trying to work out what I’ve saved so far with solar battery and EV to work out payback but it’s a little hard when the EV is chucked into the mix. Also got to rememebr these figures are for EV tariffs so if you don’t have an EV you can’t get the tariff, or that applies for Octopus go now anyway
And a small UPS in any home office will ensure absolutely no chance of any "very sensitive" electronics staying on during switchover - I still like to protect PC Towers / Workstations from grid events.
Like me you were probably originally annoyed that Alpha only allowed hourly intervals for start/stop charging. But after a year of nagging they finally changed it to 15min intervals! Click my name to see my videos on it.
was the usage off peak deducted from overall daily usage? doesn't make sense to use the battery off peak but use directly, I use about 15kWh a day but the majority is in that off peak period. Can't see any batteries these days at sensible prices, looking at 10+ years breakeven. Good video, should have jumped on the bandwagon earlier when they were cheaper.
At least here in California the difference between peak and base electricity rates aren’t enough to ever pay off the cost of battery storage. The efficiency eats up all the potential savings. I have a Powerwall with solar and it makes more sense. As I sell power to the Utility for $0.05/kwh and buy it back for $0.39/kwh peak or $0.37/kwh off peak. So it makes sense for me to save my own generation for my own use.
Very interesting video. I am installing Solar and was thinking about a propane backup generator as for equal to or less the cost of two 3KW batteries I can provide backup power day or night, sun or no sun etc.......... However I didnt factor in comparing the savings if using grid power at night to store energy (daytime light used to provide power and some storage). We currently dont have an available electric incentive for night time but it may be coming and then your video is very germane! Thanks.
Interesting video, been thinking about installing batteries but at around £10k install and at the mercy of tarrifs it could take long time and there's no guarantee of the rates getting better every year which is putting me off.
Great video and very nice work, any idea about the power losses from charging and discharging batteries, it is not ideal and there should be charging/discharging losses due to copper, heat... Etc.
Well produced video. Shame your maths division got muddled up on the third chalk board though. (25:00) Keep up the good work but keep an eye on the detail. 🙂
I would. I have been with Octopus for a few years now and cannot fault them. Others also follow their lead. So other companies are now also offering simalar products. Also shortly Octopus will allow export from battery systems into the grid. So you can charge on cheap over night and sell for more money when demand is high if you do not have solar. So it is a win win situation that really pays for itself.
@@williamarmstrong7199that's exactly what I am doing but I have a small 4kw solar system and 10kw batteries and it works great with octopus flux. Got £250 back after only three months just on export alone. Going on intelligent soon so saving will be bigger.
@@andrewparkeruk I did not assume I did a massive amount of homework and data analysis, and now with my wife's electric works car and a 4kw solar system and 10kw batteries my bills are half of what I would be paying and I will pay back everything I had fitted in 4.5-5 years not 10 years like pretty much everyone tells you. Personally a lot of people on the internet get it wrong because so many personal factors come into it.
Great skills! But please update soon for 2023 (nonEV) tariffs. Won't most of your customers oversize for longer life and allow up to 14% losses without PV?
Hi brilliantly delivered video, with the inverter, couldn’t you install a larger kWh or is that the max I can imagine everyone getting this type of system, the the energy supplier is going to think ,right we are not making enough money then crank the cheap rate up ,tbh the system you have supplied and installed is a great price , kind of makes you think why have solar panels 🤷♂️
Interesting video, but I am currently paying £0.16 night and £0.42 daytime , £0.26 per kWh difference. Prices are due to go up again in the new year. I use 30 kWh per 24 hours in October. The repayment time on the investment will shorten when more electricity is used.
Excellent video just like the rest! I would be really interested in adding the back up facility to my system given the general uncertainty regarding potential outages. I went looking for the Alpha Back up distribution board but could not identify it. Can you help?
Hi, this all looks very nice, but what happens after 5 or 10 years when the inverter and/or battery does go, I imagine at the moment they are easy to source and replace, but will this be the case in years to come, can you use a differnt inverter/battery, or retro fit in this case (I expect battery technologic to improve)? As I understand it givenergy batteries you cna force feed back to the grid (i guess at a preferential rate), is this advisable or do you prefer the alpha (which is no exportable)?
Exactly 💯 I have thought about this 🤔. I try to go woth universal batteries like pylontech that way I can get most inverters to work with that 🔋 battery
Very interesting. What is the expected life of the Battery Pack? And how does the Alpha compare to others - Tesla Powerwall and SolarEdge for example. And what does the end of life look like, - The battery stores less or is slower to charge and discharge or both. This should impact the ROI calculations. If it was a linear decrease in storage of say 1% / year you could add that into the calculation. We are looking at adding a battery to do exactly the same on Octopus Go rate that we use to charge a Tesla Model 3 every night.
If you've got the cash, then the real business case is - do the savings you get from cheaper electricity more than offset the interest earned by keeping the money in the bank? Payback period isn't what matters under these circumstances.
It certainly isn't beating stock market returns over those periods. Nowhere near it. Also I'm curious what the warranty periods are for the batteries etc? Probably a combination of age and charging throughput. Potentially a lot of expensive repairs needed over these kind of time periods.
Hi Sam. Was that £7500 installed or +? Very interesting vid. I've got PV but looking for battery storage (around 10kwh). What would you recommend from your experience (solar edge PV)?
I'm not good at sums so forgive me if I put a spanner in the works here... If you get this using a loan then interest payments and the period of the loan will skew those figures a bit, won't they? Then I'm trying to work out what happens to the figures near the end of the battery life...or are the batteries, like car batteries, likely to last much longer than their guarantee? I guess the price of replacement is wholely speculative but is it just the batteries or the rest of the system that has a limited lifespan? I am seriously contemplating going this route, I have an ev but not sure if I can get the car close enough to charge from home so don't know if the tariff available would work. Having said that the removal of power insecurity would probably be worth the price. If there's a power cut at night will the system switch to output and back to re-charging if there is time left on cheap rate...and what happens if there isn't time left on cheap rate? Can it be set to re-charge itself anyway as a contingency for power cuts? Sorry, lots of questions! Glad you made this video though, it's been really helpful in prompting which questions to ask.👍😅🤯
What a great solution. Is the UPS solution only available with this battery and inverter system or can it be added to say a Solar edge PV and Battery set up?
Isn't this system wholly dependent on the price difference between different tariffs? The companies (via the Govt.) could royally stitch up customers in the future just as the Spanish Govt. did with people buying solar panels? I also didn't understand how your circuits that were removed to the other control panel could only deliver 4.8kW? This presumably excludes any kitchen (freezer) outlets. How is the system daily providing say the use of a kettle, a toaster, an induction hob and washing machine and a water heater? Surely this is outside the capabilities of that inverter and an 11kW battery pack, so it must draw off the grid when this situation occurs?
Like the install, just one question. I was under the impression there is always energy losses with inverters and battery. So does this setup have zero losses or have you overlooked adding in that cost?
roundtrip efficiency is supposed to be 90% so 5% loss each way. Siting the system in a utility room and the losses are converted to heat and you get a bit of free heating! So then the losses are not so bad.
@@markyates5744 so why wasn't that stated and used in your calculations? I am aware of these loses but many are not. Lact of information is as bad as miss information especially from an expert working in the industry.
@@moo4rich I this isn't my video so you're asking the wrong person! But 10% loss (and the loss is to heat so if battery Inverter are in a utility room, then it's not a bad thing in winter) is fairly small in the scheme of things. But a year for each 10 approx.
Well explained, and got to say, I’m surprised more don’t go down this route. I’m looking at the MG4 car, which has V2L. Surely it’s a matter of time before V2G is the norm, and we use the car battery capacity instead of the home battery? Would it not be wise to hold off installing large home batteries, and use the EV battery, if practical? Looks like good kit though.
Won't you need to errr drive your car around so it won't be there to provide power to the house? Or are you going to spend 30k upwards just to have a battery on wheels powering your house and not drive it anywhere?
how do you get such cheap night tariffs? this year, the night tariff has gone from 0.71€ in January to 0.39€ coming June the difference between day an night tariff went from 16 €cents to just HALF a €cent This would be viable in the start of the year, but not anymore
I've now watched all of the vid and have a few thoughts/comments....don't get me wrong I'm not knocking the product and installation and I would dearly love to have one myself but.......my very broad reservations.....1. Putin's war has caused energy costs to increase and so on the assumption that if it ends, prices will come down and so surely you can't use those increased costs for the WHOLE period of your calculation. In other words the more those prices reduce WILL result in an increase in the system payback time. 2. In very broad terms, every solar PV or battery installation I've looked into (both for myself and a few for colleagues) have resulted in, give or take, a 10yr payback. The problem with batteries is that they have a 10yr warranty and so you'd be lucky to ever hit profit! Add onto this a potential investor replacement and that payback period increase. 3. I have PV (at the mo payback is just over 9yrs) and (having monitored it) the only real periods when the house WOULD benefit from battery would be the obvious darker winter months where the PV produces very little per day (compared to a lot in the brighter, longer-day months). My point is that we would NOT get the required daily charge/discharge rates as required by the battery in order for it to work at its optimum level. Less battery efficiency = a reduction in the battery's 10yr operational lifetime. 4. On a similar theme to '3', if you add PV to an existing battery system you would be saving the 'cheap' nighttime charging BUT this would be offset by the cost of the PV itself.....plus, unless you want to run heavy machinery or heat a swimming pool 24/7, what's the point of having all of that stored energy?......remember the battery has to discharge daily. 5. In general terms when costs rise so do interest rates and so how much would that £7.5k be worth in 10yrs if you locked it away?.....ie those interest 'profits' will offset some outgoings. As noted earlier, we have PV and it's on track to payback after ~9/10yrs. In years 10-20 we should be in profit and so I'm very happy to recommend PV to anyone. Unless battery costs reduce significantly I cannot get the maths to work for our situation (ie adding onto existing PV) or for the house shown in your vid, based on my comments above. I'm very happy to be proven wrong with anything written here as I've no axe to grind. 👍🙂
Just on point 2, a lot of people seem to think that the batteries are suddenly going to be stone dead the day the warranty expires. There is a risk that performance might be marginally down after that, but it's generally going to keep working the same as a power tool or a car or a washing machine does when they're out of warranty. It just wont be replaced for new by the manufacturer when at some point later on it stops working quite as well.
Nice: Q1 - is the UPS board still limited to 4.6kW during non-UPS mode? Or is the inverter diverted when not in UPS mode? Q2 - how are the two earthing systems separated? You have one CU on a PME and one on a TT? Both within touching distance of one another.
There is a slight loss yes. However to keep the idea of the video clear and easy to follow we omitted it on this instance. We may do a more detailed one in the future
£7500 invested in the S&P 500 18 years ago would be worth roughly £41,000 today. To claim that night time tarrifs will continue to fall is HIGHLY speculative. If nightime charging for housing/cars is adopted on a large scale as is being pushed then thats a substantial increase in demand for electric during the night. NEVER has a demand for a product/commodity increased and the price not increased. £400 per year (£33 per month) saving is nothing to be excited about. Food for thought people.l
Thanks for this informative video, very professional presentation! Our roof is not ideal for solar PV, but a home battery might be a good option for us. You mentioned no export on several occasions in the video, but presumably this system can be used for energy arbitrage on a tariff like Octopus Flux?
The earthing arrangement of these systems is not very clear. Earth connection on appliances provides a fault route back to the supply hence causing protection devices to cut the supply. When in inverter mode, an earth rod outside doesn't make sense when the system is running on the battery because the inverter is the supply and you need a fault path back to there, not a rod in the ground....??? Earth rods normally provide a ground route back to the supply transformer outside of your property....Anyone explain.
Suppliers aren’t taking new customers until after the Jan April price rises coming in 2023 so if you’re not already on a tariff with Octopus or similar you’d have just bought a big useless battery without solar! Let’s hope the charger can also deal with charging that much power in in a 3-4 hour period to otherwise they will never fill up before tariff ends at 4am.
Liked your video, how difficult will it be to install batteries into my home, which has a 32amp ground source heat pump, and 24 Sanyo photovoltaic panels. I guess we would need to isolate the heat pump from the batteries. I would like to have a conversation to check the feasibility.
Great video Sam. Do you have or can you do a dummies guide on what the earthing is for? I see electricians and yourself talking about but I don't know what it is, how it helps, etc. Cheers, Shez.
Thinking of same thing myself. Can these units be installed outside. In sheltered shed type unit attached to the house as the garage isn't an option in my case
This video was a cross between looking at a concept of battery only and a real life install. We haven’t taken into account those things as we wanted to make this more entry level and not over complicate it. We may do another soon in more depth
HOWdy O-R, does the OWNER plan on "PV" anytime in the future ? It seems to be leaving so So SO MUCH on the table NOT to have any SOLAR planned COOP ...
