How effective is my solar station and which months are not NET zero consumption still
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- Опубліковано 30 кві 2024
- @ModernUkrainianHomestead
Let's quickly talk about solar efficiency.
In my specific case, I am selling back to the grid up to 30kW per hour when I have excess power produced against what the household consumes.
And it appears that the only months where I lack production are December and January, and I have to buy electricity from the grid.
Well, that is an amazing result actually, given that everything is electric in the house - heating, cooker and oven, water heating, and everything else. The only things that are not electric yet - are the cars, but that may change at some point later. - Наука та технологія
That is fantastic! You are lucky you can sell so much to the grid.
In the uk I can only sell 3.6kwh on a G98 contract, the rest of my solar I have I don't get paid for but I charge with it and with an ev we use it all.
yep, your regulations are more strict.
We have a 30kW limit now, it used to be 50 just 4 years ago...
And I wonder - there are only about 60000 solar installations across my country, and in your country I bet every second roof has got panels on it.
@@ModernUkrainianHomestead its not that common, I am also in the UK and an installer told me its not worth doing it if its an investment, he told me I should only do it if I care about the environment. Has it been a good investment for you?
Yes it is. Full 100% ROI for my system, together with the batteries (400 AH, LiFePO4 for 48v system) and a combo of grid-tie and hybrid inverter (20+10 kW), is going to happen in just 5.5 years. The secret is - the bigger you go - the faster the ROI is. If I'd go for 5 kW system only, ROI would've been about 15 years or so.
@@ModernUkrainianHomestead In UK most people live in terraced houses with not enough land to put solar panels on the floor. to put them on the roof is a lot more expensive, I was told it can be an investment if i own a field but the installation cost is the main cost, and its much more on a tall roof.
hm. In our case, it's way cheaper to put on the roof. typically the mounts cost about $45-55 per panel if on the roof (depends a bit on the type of the roof, metal roof, ceramic roof, flat roof, there are systems for each roof type). to put on the land - the construction to be built adds a couple of grands in general. so atop to $45 per panel, you have to generally add about $2000 for a set of 20 panels for example.
I'm not putting labor cost in that numbers, just the materials, since labor differs a lot from country to country. In my case, I generally end up paying $12-15 per hour for some skilled assistance (unlike it's commonly thought that labor is cheap in Ukraine), that is why I try to do a lot of stuff on my own since you can save a lot.
What about storing the excess electricity as heat to help get through December and January?
you can't store heat for more than 2-3 days I think, it will naturally dissipate... regardless, whatever heat tank you will use, sand, earth, water or anything else. you can store energy though for a much longer period, however, it will cost enormously high, so it's easier and way cheaper at the moment of need to either buy some (if you have grid) or if you don't have grid - to produce some with high-maneurable power source (petrol or diesel generator)
@@ModernUkrainianHomestead There are relatively inexpensive methods to store annualized geothermal solar using a separate solar collector to capture heat either direct solar or using PV and resistance heaters. The collected heat is delivered to an insulated storage device (soil, gravel bed or water tank) either passively by the convection of the heat transfer medium (e.g. air or water) or actively by pumping it.
I heat up the crushed glass in my insulated cistern with a biochar pyrolysis equipment outfitted with a heat exchanger so I can pump the heat into it and pull the heat out using a separate circuit of piping in the glass to feed into my hydronic underfloor heating and cooling system.
well, that is useful if you use liquid-based heating system, which I refused of due to enormously high price.
I've been getting quotations for about $15-17k for the liquid-based heating for my house (175 sqm, without balconies and underroof). and in the end I managed to spend only $2.5k for the entire house heating via ceramic heaters (which are low-consumption by the way), but that sum is true for the house including balconies and underroof space...
So well, for me the storing element is electricity now, and for $13-15 k saved on the heating I just got the batteries. And now my system is very easy-maintenance one, easy replacement of the failed unit, and well, it consumes max 5.7 kW once all the elements are on (and this is for almost 300sqm heated space). This is insanely low, and allows me to not worry about power outages.
You should use the surplus electricity to mine cryptocurrency, it will work out as a much better price per kwh.
Thanks, I thought about that. Don't have the prepared place for it yet, but likely will get one ready after I'm done with the house internal works and with the yard (there is still tons of work left to be done).