This is an excellent presentation! I've just watched a couple of your videos, and a corollary I am seeing is the return of dirt-cheap energy. What an excellent opportunity!
I was working at the end of the world for an NGO as tech support. Everybody kept telling me that diesel generators are the safest solution, because solar panels are stolen. Within a year, we had plenty of near-disasters from stolen fuel and interrupted fuel supply chains. Within the same year, we had not a single solar panel stolen.
Great ideas, excellent presentation. Your comment about "batteries getting cheaper" triggered me a bit - until I checked local reseller and found out that 5kWh battery went from 1600 CHF to 1300 CHF. I might be extending my storage ;)
living in an Apartment, you could install a plug in pv system - in Germany they are now dirt cheap and you are allowed to just plug it in your socket for
kWp does have a standardized definition; it's the output when the module is exposed to 1,000 W per square meter of irradiance at 25 degrees C and an air mass equivalent to 1.5 times the vertical atmospheric air mass.
Good primer for high latitudes. We closer to the tropics folks are blessed. It doesn’t cost much to add PV to size your system to meet winter needs, IF you have the roof space. We designed the house for PV with pitched equator facing roof. We’re 27 degrees south and with a 10kW inverter, 14kW PV, we can charge the car and water heat in mid winter. System cost was $12k Australian. In US dollars it would be less, but in the US red tape increases costs, so about the same.
6:50 - There are point of use electrical shower heads, invented and extremely common in Brazil… idk about EU regulations, but they exist, eliminating the need for a central water heater
I’ve been saying for ages that if we got rid of the standing charge in the uk we could use heat pumps for heating for the 95% of the year when they make sense and the rest of the time use gas. The problem is that the energy companies in the uk would use this as an excuse to put the price of gas units to be about the same as electricity units. Then there’s no point in having gas. All the while the government regulator is colluding with the companies.
A big problem for Ukraine is their Soviet legacy of centralised district heating which provide heating to homes, which I think is crazy particularly as Russia is directly targeting heating plants in winter. It should be a matter of priority for the Ukr govt to begin large scale rollout of home solar. District heating isn't particularly common in Europe and America but I've seen a few examples of data centers beginning to export excess heat to surrounding neighbourhoods for a nominal fee. I get why some might advocate for this but they're a terrible idea if we're talking about energy resiliency and I hope the war in Ukraine will prove to policy makers not to go down that road.
You forgot to mention heat pump water cylinder (heater) with most of them with COP above 4 so thats gonna help a lot , or the other route is instead of sizing the system for water heating to go directly to solar water panels
I've been running on solar and batteries for about 6 months. Adapting an efficient lifestyle, I'm at about 1 kWh/day for traditional and cooking. I'm not sure why people need 2kWh. My best guess is induction cooking and upright refrigeration. While the induction hob is better than previous alternatives, the insulated electric pressure cooker is much more efficient as radiant, convective, conductive and vapour losses tend towards zero. Add on a hot air fryer top and you have an electric oven with superior thermal insulation for less total capital and operational expenditures. Using chest freezer and refrigerator probsbly saves a decent amount vs the upright versions and their cold losses when opened. But still 2kWh/day seems like a lot. One could easily run several room based HRV/ERVs and a bit of atmospheric water generation or heat pump drying and stay under that limit. Maybe it's that you can't manage what you can't measure, and if you setup your own system you start paying attention. That attention by itself seems to drop usage.
I think its a mistake to match the inverter-power with the kwp of the modules. Inverters should ALWAYS be overbuild with modules at least 1,5X, better 2X.
Isn't matching inverter power with peak kwp of the panels already enabling overbuilding it? I mean, they are going to rarely reach that power anyway, so you should be safe. Sure, overbuilding by say 1.1-1.2 factor seems reasonable just in case, to prevent potential overheating, but why should you overbuild by a factor 1.5-2?
@milospavlovic7520 Because panels are cheap. And gridwork is expensive. And you don't need the peak power anyway (if you do, you don't have enough panels) Its perfectly save, our balcony solar systems very often come with 2kW panels and 800W inverter.
@@thiesclausen4868 Oh, sorry, I understood that you were saying inverter should be more powerful, but you were actually saying panels should always be more powerful precisely because they won't be at peak most of the time. That makes much more sense to me
sure and make the story complete your electric meter is a joule meter how the woke left turn things try to make from a kwh meter a joule meter why for fame sorry but it will stay a kwh meter, so sad that you need the son of a brewer to learn that a hour have 3600 seconds x 1 watt just faik know first what volts is a second 230 V x 50 hz is in fact 50 x 4,6 V in one second the same you can do with 60 hz and the hz have nothing to do with rpm but with poles on the rotor. knowing electricity is more than using a word joule in a storry. unbreakable again fake info you are using they can break milions know that
If solar panels are so cheap and getting cheaper, why could we not dimension the inverter and battery to our peak monthly needs (January in cold climates, and rather July in hot climate, where A/C is prevalent), AND dimension the solar panel peak power to the second lowest production day in the entire year (the first lowest being covered by the battery) ? Sure, most household would not have a roof big enough... but a lot would have a garden big enough on top! Furthermore, ground-based installations are cheaper and easier to maintain. In my case, I have 3.6 ha... so, no sweat! I 100% agree it is not financially optimum, but a) the surplus might not be that huge, and b) boy, is it tempting to be independent from the grid! O! I forgot to say... let's factor in the variable of owning an EV with V2H capability!
This is an excellent presentation!
I've just watched a couple of your videos, and a corollary I am seeing is the return of dirt-cheap energy. What an excellent opportunity!
I was working at the end of the world for an NGO as tech support. Everybody kept telling me that diesel generators are the safest solution, because solar panels are stolen. Within a year, we had plenty of near-disasters from stolen fuel and interrupted fuel supply chains. Within the same year, we had not a single solar panel stolen.
Great ideas, excellent presentation. Your comment about "batteries getting cheaper" triggered me a bit - until I checked local reseller and found out that 5kWh battery went from 1600 CHF to 1300 CHF. I might be extending my storage ;)
The biggest obstacle to solar in the US are HOA who usually do not allow solar.
living in an Apartment, you could install a plug in pv system - in Germany they are now dirt cheap and you are allowed to just plug it in your socket for
kWp does have a standardized definition; it's the output when the module is exposed to 1,000 W per square meter of irradiance at 25 degrees C and an air mass equivalent to 1.5 times the vertical atmospheric air mass.
You could increase the ratio of winter to solar sun by having south facing vertical solar panels, like a fence.
Good primer for high latitudes. We closer to the tropics folks are blessed. It doesn’t cost much to add PV to size your system to meet winter needs, IF you have the roof space. We designed the house for PV with pitched equator facing roof. We’re 27 degrees south and with a 10kW inverter, 14kW PV, we can charge the car and water heat in mid winter. System cost was $12k Australian. In US dollars it would be less, but in the US red tape increases costs, so about the same.
6:50 - There are point of use electrical shower heads, invented and extremely common in Brazil… idk about EU regulations, but they exist, eliminating the need for a central water heater
I’ve been saying for ages that if we got rid of the standing charge in the uk we could use heat pumps for heating for the 95% of the year when they make sense and the rest of the time use gas. The problem is that the energy companies in the uk would use this as an excuse to put the price of gas units to be about the same as electricity units. Then there’s no point in having gas.
All the while the government regulator is colluding with the companies.
A big problem for Ukraine is their Soviet legacy of centralised district heating which provide heating to homes, which I think is crazy particularly as Russia is directly targeting heating plants in winter. It should be a matter of priority for the Ukr govt to begin large scale rollout of home solar.
District heating isn't particularly common in Europe and America but I've seen a few examples of data centers beginning to export excess heat to surrounding neighbourhoods for a nominal fee.
I get why some might advocate for this but they're a terrible idea if we're talking about energy resiliency and I hope the war in Ukraine will prove to policy makers not to go down that road.
The positive side of district heating is that you can burn anything in the furnace, however your point about centralisation is valid.
At least in Finland district heating is the most common type of heating.
You forgot to mention heat pump water cylinder (heater) with most of them with COP above 4 so thats gonna help a lot , or the other route is instead of sizing the system for water heating to go directly to solar water panels
I've been running on solar and batteries for about 6 months. Adapting an efficient lifestyle, I'm at about 1 kWh/day for traditional and cooking.
I'm not sure why people need 2kWh. My best guess is induction cooking and upright refrigeration.
While the induction hob is better than previous alternatives, the insulated electric pressure cooker is much more efficient as radiant, convective, conductive and vapour losses tend towards zero. Add on a hot air fryer top and you have an electric oven with superior thermal insulation for less total capital and operational expenditures.
Using chest freezer and refrigerator probsbly saves a decent amount vs the upright versions and their cold losses when opened.
But still 2kWh/day seems like a lot. One could easily run several room based HRV/ERVs and a bit of atmospheric water generation or heat pump drying and stay under that limit.
Maybe it's that you can't manage what you can't measure, and if you setup your own system you start paying attention. That attention by itself seems to drop usage.
Excellent presentation once again!!
I think its a mistake to match the inverter-power with the kwp of the modules.
Inverters should ALWAYS be overbuild with modules at least 1,5X, better 2X.
Isn't matching inverter power with peak kwp of the panels already enabling overbuilding it? I mean, they are going to rarely reach that power anyway, so you should be safe. Sure, overbuilding by say 1.1-1.2 factor seems reasonable just in case, to prevent potential overheating, but why should you overbuild by a factor 1.5-2?
@milospavlovic7520 Because panels are cheap. And gridwork is expensive. And you don't need the peak power anyway (if you do, you don't have enough panels)
Its perfectly save, our balcony solar systems very often come with 2kW panels and 800W inverter.
@@thiesclausen4868 Oh, sorry, I understood that you were saying inverter should be more powerful, but you were actually saying panels should always be more powerful precisely because they won't be at peak most of the time. That makes much more sense to me
Micro-Inverters can do 0.3 kW
yep a left social picture that shows how they lie.
sure and make the story complete your electric meter is a joule meter
how the woke left turn things try to make from a kwh meter a joule meter
why for fame sorry but it will stay a kwh meter, so sad that you need the son of a brewer
to learn that a hour have 3600 seconds x 1 watt just faik know first what volts is a second
230 V x 50 hz is in fact 50 x 4,6 V in one second the same you can do with 60 hz
and the hz have nothing to do with rpm but with poles on the rotor.
knowing electricity is more than using a word joule in a storry.
unbreakable again fake info you are using they can break milions know that
If solar panels are so cheap and getting cheaper, why could we not dimension the inverter and battery to our peak monthly needs (January in cold climates, and rather July in hot climate, where A/C is prevalent), AND dimension the solar panel peak power to the second lowest production day in the entire year (the first lowest being covered by the battery) ? Sure, most household would not have a roof big enough... but a lot would have a garden big enough on top! Furthermore, ground-based installations are cheaper and easier to maintain. In my case, I have 3.6 ha... so, no sweat!
I 100% agree it is not financially optimum, but a) the surplus might not be that huge, and b) boy, is it tempting to be independent from the grid!
O! I forgot to say... let's factor in the variable of owning an EV with V2H capability!