25 Responses to “solar panel systems -Sizing Your Solar System”
2:40 You are actually using electricity directly from the solar panels and
if some difference is needed is taken from the battery.
Lead Acid are actually expensive compared to Lithium when used for energy
I also live offgrid and use about 2kWh/Day in average maybe a bit more in
the summer just because there is more produced.
I have 3x 240W solar panels as main solar panels and a small 300W wind
turbine to help in winter and cloudy days so I only need a 100Ah 24V
LiFePO4 battery that can be discharged down to 20% for a few thousand
cycles so I can use as much as 2kWh from the battery from the total
capacity of about 2.5kWh
I usually use way less just because I use most of the energy during the day
directly from the sun.
If you have say 800W from the solar panels going to battery and you connect
a 1000W load your battery will discharge at a rate of 200W the rest of 800W
will come directly from the solar panels and in that way much cheaper.
At 1$/Watt for solar panels and say just 25years life the kWh will cost
just under 3cent/kWh depending on how much sun you have where you live.
Battery on the other hand even the cheapest that is Lithium will cost
I need to make a video soon explaining and demonstrating this.
There is one problem and that is that you can not find a charge controller
for Lithium so I designed my own and I will have soon on Kickstarter.
+Wick3DPimP thing is, its not a matter of “just stay on the grid” he
mentioned building an earthship house, which means hes in the middle of
nowhere, and the design of the house reduces the need for temperature
control. and lots of natural light use. there are also a lot of low power
alternatives to a lot of things. its really not as big an adjustment as you
you also priced it at $15, but forgot the “delivery” charge they bill you
for each month.
Earthship houses are actually cheaper in both construction and maintenance.
also you are forgetting the whole rv and boating thing.
I have 1 120 watt pannel, Would a 200 amp hour AGM battery work ( 12 volts
x 200 amp hour = 2,400 watt hours ie 2.4 kw/hrs right? What
converter/invrter do i need to take 12v dc to turn it into 110v AC? any
I’m using a Nedap Powerrouter. That invertor makes it possible to use
direct power from the solar panels without using the batteries. Even
without batteries, on a sunny day I can let my home running on direct
Thank you, Thank you, Thank you!!! I have been searching for a simple
explanation on how to size a solar system for my needs, and this is
perfect! Awesome video! I subscribed as well. Keep up the good work =)
Great explanation! Your system looks to be real pro. Let me ask you, is
there a battery that you can use that you do not have to remove the caps
like you do? Gell cell or? I don’t know how much time I would have
service like this. Why did you choose the type of batteries that you did?