They are not designed for deep daily discharge like is needed in my case.
At 8min, if 19.95MWh was produced and 7.238MWh consumed, how is that 24.7% of solar produced was used?
dave why you dont build your own battery,to store all that electricity generated by solar panels?
you could use old smartphones batteries sent by your viewers,laptop batteries
or cheap lithium batteries made in china.
it would be any intresting video,if you decided to make it your own instead..It would takes many months of almost full time work to design and build such a solution for a video.
The problem with people seeing what others have done in videos and say "why don't you do that", is they don't realise the massive amount of work these people have done behind the scenes in order to do that. HBpowerwall is one such example, he's been working on that system for a couple of years.
It would takes many months of almost full time work to design and build such a solution for a video.
The problem with people seeing what others have done in videos and say "why don't you do that", is they don't realise the massive amount of work these people have done behind the scenes in order to do that. HBpowerwall is one such example, he's been working on that system for a couple of years.
QuoteAt 8min, if 19.95MWh was produced and 7.238MWh consumed, how is that 24.7% of solar produced was used?Easy.
100% of the power produced was used : 24,7% by Dave, 75,6% by someone else
Dave consumed 4.9 MWh of his own production only. The rest 2.31 MWh was consumed by dave off the grid when he didn't produce (at night)
Different chemistries, different battery management. If you limit depth of discharge and charging voltage, you can significantly increase the number of cycles a cell is good for. If you use the full capacity, they're only good for a few hundred cycles.
https://www.powerstream.com/lithium-ion-charge-voltage.htm
-R C
Although a power wall to buffer solar production is almost certainly going to be a deep cycle application.
dave why you dont build your own battery,to store all that electricity generated by solar panels?
you could use old smartphones batteries sent by your viewers,laptop batteries
or cheap lithium batteries made in china.
it would be any intresting video,if you decided to make it your own instead..It would takes many months of almost full time work to design and build such a solution for a video.
The problem with people seeing what others have done in videos and say "why don't you do that", is they don't realise the massive amount of work these people have done behind the scenes in order to do that. HBpowerwall is one such example, he's been working on that system for a couple of years.Besides that using random cells is asking for trouble. The idea of using discarded cells isn't new but it will take carefull matching and measuring of the cells to see from which ones you can built a reliable and (more important) safe battery pack. However I'm quite sure we will see batteries for residential (I'm avoiding the word home here because the batteries could also be located at a nearby sub station) storage of electricity becoming more affordable in the future. If a larger part of the electricity supply is going to depend on wind and solar some kind of storage is a requirement to make it all work.
I think you also need to look at how many people keep their homes =>10yrs. If most move under that, there is little sense in installing it.
That logic seems a bit flawed. Presumably, having a lower expected electricity bill would be a value add for the new owner as well, so it should increase the resell value of the home.Property agents say few buyers see value in solar panels, so why would they see value in battery packs?
Yea that's going to be a massive amount of SLAs to get to 5K cycles.
Yea that's going to be a massive amount of SLAs to get to 5K cycles.There are also more premium lead acid batteries out there. Like Trojan industrial solar line as in the graph below. About 3600 cycles at 50% DoD.
If the feed-in tariff is high, then no battery technology is viable, because it is too expensive.
There are two use cases where batteries sometimes make sense :
1) If the price of electricity for the consumer is high, and the feed in tariff is low, and your daily average is quite stable, like Dave's past situation you can consume your production in shift. You approach autarcy then.
2) If the feed in tariff is highly variable, with a "smart" meter, you can shift your feed in to the most interesting time. You help to regulate the grid at that point.
There are two use cases where batteries sometimes make sense :
1) If the price of electricity for the consumer is high, and the feed in tariff is low, and your daily average is quite stable, like Dave's past situation you can consume your production in shift. You approach autarcy then.
2) If the feed in tariff is highly variable, with a "smart" meter, you can shift your feed in to the most interesting time. You help to regulate the grid at that point.
And maybe (3) If you own an electric car that needs charging at night.