AutisticMorty1111
New Member
- Joined
- Nov 8, 2021
- Messages
- 4
I've been looking at building a 48v emergency back-up power system, with hopes to add panels and batteries in the future.
My intention was to build a temporary emergency back-up, and then in a year or so I'll be moving the system to power an off-grid tiny house that I'll be building, where I'll be adding more panels and batteries.
I wanted to start with:
So that means I should only connect 312 Watts of solar panels (48v x 6.5a), correct?
So having 1360 watt of panels is pointless...?
I wanted to start with a 48v system, so when I upgrade in the future, I can continue using the inverter and charge controller.
I'm in Europe and LifePO4 is too expensive right now, so I don't want to buy 4 lithium batteries needed for the 48v system, I wanted to wait another year or two for prices to fall before getting lithium.
I was hoping I could oversize the system, so I could use the electricity generated during the day to ie. run laundry, using the energy before it was fed into the battery. But I guess that won't be possible unless I get an all-in-one system that will let me set a max. charge current, while being able to consume the higher generated current as needed...?
Thoughts? I think I'm back to square-one on the drawing board. Not sure what to do now.
My intention was to build a temporary emergency back-up, and then in a year or so I'll be moving the system to power an off-grid tiny house that I'll be building, where I'll be adding more panels and batteries.
I wanted to start with:
- 4x 340W panels (40v/10a each, in formation of 2S2P)
- 48v 2000W inverter (peak 4000W)
- 48v 30amp charge controller
- 4x 12v 65ah AGM batteries
So that means I should only connect 312 Watts of solar panels (48v x 6.5a), correct?
So having 1360 watt of panels is pointless...?
I wanted to start with a 48v system, so when I upgrade in the future, I can continue using the inverter and charge controller.
I'm in Europe and LifePO4 is too expensive right now, so I don't want to buy 4 lithium batteries needed for the 48v system, I wanted to wait another year or two for prices to fall before getting lithium.
I was hoping I could oversize the system, so I could use the electricity generated during the day to ie. run laundry, using the energy before it was fed into the battery. But I guess that won't be possible unless I get an all-in-one system that will let me set a max. charge current, while being able to consume the higher generated current as needed...?
Thoughts? I think I'm back to square-one on the drawing board. Not sure what to do now.