Brucey
Solar Wizard
Ok, so if you doubled use of your battery and left say 10kWh of reserve, you'd be at 10 cents per kW.
Prices dropping, will this continue?
- Thread starter DouglasPaul
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Ampster
Renewable Energy Hobbyist
Yes 10 cents per kWh for storing energy that cost 5 cents to produce with solar. If you were arbitraging the grid that cost would be higher plus in my case Non Bypassable Charges of 2.5 cents have to be added because I am on NEM 2.0.
Dave911
Solar Enthusiast
Good thing I don't have a Priest! Ha ha......
“I spent half my money on gambling, alcohol and wild women. The other half I wasted.”
― WC Fields
Hedges
I See Electromagnetic Fields!
- Joined
- Mar 28, 2020
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Your $0.20/kWh is more likely to match reality.
My figures are bottoms up best case. But including my expectation it will go down in flames after 25% of claimed life, we arrive a exactly the same figure (well, not quite; you included inverter and PV.)
I expect PV to last 25 to 40 years (but some bad panels die young.)
Quality inverter to last 20 years.
Battery to last 16 years of 1 cycle/day (if 6000 cycles is to be believed).
My alternate way to determine cost is 10% of purchase price per year for long-lived assets. That bakes in some interest rate. So exactly what you did, except I apply it to things not expected to wear out.
And I've said 5 cents to store a kWh that cost 2.5 cents to produce (only if same inverter supports battery.)
I recently paid $2000 for 3x SBS 5.0, $3000 for 2x LG RESU-10H. Those batteries have about half the cycle life of LiFePO4, works out to $0.085/kWh if no other costs to install.
Marginally worth using to arbitrage my $0.20/kWh spread between on/off peak. If they served me for occasional backup, using for arbitrage would let them pay for themselves, backup is free. Except first night of a power failure would be spent in the dark, because they would be drained every evening when peak rates ended.
I was primarily interested in AC coupling them to SI + AGM, keeping AGM at float thereby extending life. Not sure they will respond to frequency shift for both charge and discharge. SMA denies "off-grid 60" applies to SBS, says that is an SB thing. I have a screenshot from their instructions indicating otherwise.
My figures are bottoms up best case. But including my expectation it will go down in flames after 25% of claimed life, we arrive a exactly the same figure (well, not quite; you included inverter and PV.)
I expect PV to last 25 to 40 years (but some bad panels die young.)
Quality inverter to last 20 years.
Battery to last 16 years of 1 cycle/day (if 6000 cycles is to be believed).
My alternate way to determine cost is 10% of purchase price per year for long-lived assets. That bakes in some interest rate. So exactly what you did, except I apply it to things not expected to wear out.
And I've said 5 cents to store a kWh that cost 2.5 cents to produce (only if same inverter supports battery.)
I recently paid $2000 for 3x SBS 5.0, $3000 for 2x LG RESU-10H. Those batteries have about half the cycle life of LiFePO4, works out to $0.085/kWh if no other costs to install.
Marginally worth using to arbitrage my $0.20/kWh spread between on/off peak. If they served me for occasional backup, using for arbitrage would let them pay for themselves, backup is free. Except first night of a power failure would be spent in the dark, because they would be drained every evening when peak rates ended.
I was primarily interested in AC coupling them to SI + AGM, keeping AGM at float thereby extending life. Not sure they will respond to frequency shift for both charge and discharge. SMA denies "off-grid 60" applies to SBS, says that is an SB thing. I have a screenshot from their instructions indicating otherwise.
...........I just received 16 Batterotech 280Ah cells from GobelPower today......this is rather..........unexpected..........
Havent got the time to install it yet. Still very surprised with the delivery......
Exciting news! Let us know if the cells check out plz!
Except the part where I am in Singapore right now and not in Malaysia. Gonna take some annual leaves to go back home as soon as possible.
From the pictures and videos sent by my parent at hometown, all 16 Batterotech cells are in pristine condition.
Now then.....where is my other cells order from Seplos? Hmm.......
Uh oh.......Do I need to prepare something for the small contact points? Any guide is appreciated.
I don't know. I'm no expert. I just look at it and go hmm.
They are probably just fine for the 0.5C rate and I'm simply being stupid
ArthurEld
Solar Wizard
Make sure the busbars are flat with no burrs. They are stamped and some aren't flat.
Clean everything with acetone. Put a thin layer of Ox-Gard or NoAlox on the terminals.
Clean everything with acetone. Put a thin layer of Ox-Gard or NoAlox on the terminals.
Hedges
I See Electromagnetic Fields!
- Joined
- Mar 28, 2020
- Messages
- 20,795
Links or it didn't happen.
How many ah is this one? Looks beefy
Same, 280Ah
Giantkiller
New Member
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