Diy solar battery backup1/9/2024 But we reached out to Juan from Beginning From This Morning to help us work through the transition from a 12V system to a 48V system. Based on our goals out here, and the fact that we’d been living low power in our Airstream for years, we already had a pretty good idea of how much power we’d need. Let’s talk big picture setup before we get super nerdy. Should we get in a situation where we need 220V power, we can always switch out the inverter or add more batteries. Our stove would be gas or wood, and a we really don’t need a clothes dryer out here with our endless sun and low humidity. This meant we could setup our power system at 120V power instead of 220V. And by building with earthbags we took advantage of thermal mass transfer and passive solar heating. For heating and cooking we would supplement as much as we could with propane, gas, or wood. This setup needed to power some large appliances - air conditioners, power tools, transfer pumps, and kitchen gadgets like a blender and instant pot.īut we also wanted to be smart about our usage, especially in the cold months. Inverting from 48V to 120V is so much more efficient than 12V or 24V, but still low voltage enough to work with safely. And we also knew that a 48V lithium battery bank was the way to go. We knew this off-grid solar system needed to be large enough to power our Airstream, Solar Shed, and eventually our house. So not only did our resolve to stay off-grid send us down the road of building our own system - it turned out we could build the whole thing cheaper than it would’ve cost to run the power to our property anyway. Like $35,000! And then we’d get the pleasure of paying the power company every month for our usage. Like we mentioned, running off grid power wasn’t really part of our dreams or goals - but turns out it’s really expensive to run a power line half a mile. We can see our closest power pole about half a mile up the road, so theoretically it could’ve be possible to run those lines to us. While our property was completely off-grid, connecting to the the power company wasn’t out of the question. Let’s start by talking quickly about our situation.
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