Is it still worth exporting your home battery?

It would make more sense to me, theyre charging more for electricity at those times therefore they can afford to pay more.

That's what I thought. If they gave me a better export price at these times I'd just set the battery to routinely discharge then, and it would be easier for me too.

(y) but they do exactly that on Octopus Agile.... paying nearly 17p in the next 30 mins from now.. and you'd get 19.44p / kWh for export between 18:30 and 19:00 today :)

 
(y) but they do exactly that on Octopus Agile.... paying nearly 17p in the next 30 mins from now.. and you'd get 19.44p / kWh for export between 18:30 and 19:00 today :)

Can you go on agile for export only remaining on intelligent for import?
 
@Rolfe - will you consider moving to Intelligent Flux over the Summer?

You get great export rates then. Though miss out on cheap overnight, sadly.

Worth doing as long as you are generating a certain multiple of what you use over 24 hours. Tim from Tim and Kat YT channel does calculations of when it is worth switching.
 
It would make more sense to me, theyre charging more for electricity at those times therefore they can afford to pay more.
Yes, you will see battery degradation at those voltages. It cost me $10,000 in cells to perfect my BMS setting and that has paid off in spades.
I would mind betting you can't get 100% capacity at a 2C discharge rate, at the end of 2 hrs they cell voltages must still be better than 3v under load ....

T1 Terry
 
I do
Yes, you will see battery degradation at those voltages. It cost me $10,000 in cells to perfect my BMS setting and that has paid off in spades.
I would mind betting you can't get 100% capacity at a 2C discharge rate, at the end of 2 hrs they cell voltages must still be better than 3v under load ....

T1 Terry
nt have the equipment to do a 560A discharge on them, capacity does still seem to be good, the BMS is reporting 100% SOH and the voltages I used were specified by the cell manufacturer? Which aspect do you feel is wrong in my system?
 
I used the figures that EVE supplied and keyed them straight into my active balancer. The active balancer shows SOH 100% and this is it's 5th year of operation.

View attachment 44650
The high voltage charge cut at 3.65v is good
recovery could be a little higher
High voltage alarm 3.5v, not point in having an alarm set higher the charge cut
High recovery reset to 3.45v
Low voltage alarm 3.0v
Low voltage alarm reset 3.1v
Low voltage cut 2.85v
Recover 3.0v
Low voltage forbidden charge 2.5v
Recharge restricted to under 1 amp until the cell voltage hold 3v with no load or charging, then full current charging can be applied

The reason for the higher low cell voltage cut is the drop off after 2.8v is very fast.
Even set for 2.7v, the cell will see close to 2v before the action takes affect if the discharge current is high.
If the discharge current is a trickle and the cell voltage is approaching the 2.7v mark, then a high current load is applied, there is a very real possibility of the cell being pulled below 0V resulting in a reverse current flow .... close enough to instantaneous death for an LFP cell, just getting below 1.5v results in internal material sacrifice in the attempt to maintain better than 2v ...... the result is always increased internal resistance and loss of capacity ....
LFP cells are more susceptible to low voltage damage than high voltage damage, but neither is good for long cycle life

T1 Terry
 
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