I believe that each Power Wall maxes out at about 11 KwH. You want to get enough Power Walls to run your house first and foremost. You can then decide how many of those you would want to have to charge your Cybertruck (etc.) and how much charging you need for the Cybertruck. If, for example, what you want is enough to get to a supercharger then you calculate out at a guess for the number of KwH/mile the Cybertruck gets and how many miles you need to go and divide that into 11 KwH/Power Wall.
This really depends on your use case, for which we would have to know more details.
You're assuming the OP does not have room for a ground mount on their property
Doesn't sound enough by far for 4 EVs. Barely enough for your house and one EV for 80miles a day.
Yep I'm assuming he wants t9 know how much solar he wants to put on his house. If he has space on the ground he could do that too, but it will cost more, or at a minimum take up yard space.You're assuming the OP does not have room for a ground mount on their property
But how much does it cost to use it? It's fairly easy to use GE to get some decent info on a site performance, together with SAM from NREL. But simulation is only as good as the weather.
I live in sun city TX with around 300days of sunshine. I drive about 18 miles a day. I was instructed to charge my EVs during day time and use the stored energy for my house at night. I'm the only driver.
This really depends on your use case, for which we would have to know more details.
Are you planning on charging your CT at home during the day directly from solar, or at night when the sun doesn't shine from the Powerwalls or grid? What type of feed-in arrangements can you get with the network supplier, because using the grid to store power is much cheaper than a powerwall, and then you can just install more solar instead of more batteries at home which is much more cost effective.
For calculating how much solar you can use this free calculator that does all the hard work for you: https://pvwatts.nrel.gov/pvwatts.php
Just plug in your location, and then the amount of solar and orientation you have space for on your roof and it will work out how much you can expect to get per month in Colorado Springs from 10kW of solar panels:
You can then divide each monthly value by the days in the month to get a daily kWh average output. In June that's 52kWh or about 130miles per day, in winter 35kWh or 87miles. (Just times kWh by 2.5 to get miles)
Note if you are building a house you will need a significant amount of roof space facing south at the right roof angle to capture this amount of power from a 10kW system, so this needs to included in your house plan stage, as it's nigh impossible to change after the house is built.
As a rule you can never have to much solar, and installing solar panels is cheap in comparison to batteries. Having more PV panels means you will also still get some power when it rains or is cloudy, and more importantly for a longer period of the day because you have more exposed area in the morning and evening periods when the sun is low, which works out to a much better average gain. Batteries on the other hand do NOT make any power at all, they can only store it, meaning the power has to come from somewhere else, like the grid, which costs money, if you don't have enough solar. Also use the winter months as a guide and worst case scenario, in summer you will then have excess, but on average you will then have enough.
You obviously need to allow for enough energy for your household use as well. The easy way to do this is to look at your last utility bill for how many kWh you use per month, adapt that to your expected consumption in your new house, and size a solar system to cover what you need using PV watts.
Let us know if you get stuck, or feel free to elaborate here what goals you have.
JBee, I may have to buy you lunch and we can talk about all things EV and solar power. And the when we both get our Cybertrucks we should definitely have a have our Cybertrucks side by side to blow peoples minds!This really depends on your use case, for which we would have to know more details.
Are you planning on charging your CT at home during the day directly from solar, or at night when the sun doesn't shine from the Powerwalls or grid? What type of feed-in arrangements can you get with the network supplier, because using the grid to store power is much cheaper than a powerwall, and then you can just install more solar instead of more batteries at home which is much more cost effective.
For calculating how much solar you can use this free calculator that does all the hard work for you: https://pvwatts.nrel.gov/pvwatts.php
Just plug in your location, and then the amount of solar and orientation you have space for on your roof and it will work out how much you can expect to get per month in Colorado Springs from 10kW of solar panels:
You can then divide each monthly value by the days in the month to get a daily kWh average output. In June that's 52kWh or about 130miles per day, in winter 35kWh or 87miles. (Just times kWh by 2.5 to get miles)
Note if you are building a house you will need a significant amount of roof space facing south at the right roof angle to capture this amount of power from a 10kW system, so this needs to included in your house plan stage, as it's nigh impossible to change after the house is built.
As a rule you can never have to much solar, and installing solar panels is cheap in comparison to batteries. Having more PV panels means you will also still get some power when it rains or is cloudy, and more importantly for a longer period of the day because you have more exposed area in the morning and evening periods when the sun is low, which works out to a much better average gain. Batteries on the other hand do NOT make any power at all, they can only store it, meaning the power has to come from somewhere else, like the grid, which costs money, if you don't have enough solar. Also use the winter months as a guide and worst case scenario, in summer you will then have excess, but on average you will then have enough.
You obviously need to allow for enough energy for your household use as well. The easy way to do this is to look at your last utility bill for how many kWh you use per month, adapt that to your expected consumption in your new house, and size a solar system to cover what you need using PV watts.
Let us know if you get stuck, or feel free to elaborate here what goals you have.
Nice, so room for at least 8 passengersJBee, I may have to buy you lunch and we can talk about all things EV and solar power. And the when we both get our Cybertrucks we should definitely have a have our Cybertrucks side by side to blow peoples minds!
