whereswally606
100 kW
So I have had this idea that I would like a powerwall which serves many purposes.
I bought into quite heavily one type of 40v toolpack battery, which I also can power a mower, strimmer and mine and my wife's ebikes.
Kind of irrelevant which battery it is but it comes in 2.6ah and 4ah at 40v nominal 10s2p inside.
They were sold by b&q in their Macallister brand (blue and grey, then later black and blue)
homebase under qualcast (green and black)
and now argos under spear and Jackson (black and red)
Ive been buying these 2nd hand off ebay whenever ive seen them for cheap with the idea of putting new cells in failing ones but mainly using them on my ebikes until they do fail and they have been great.
So I already have a plastic printable design to hold the battery to the bike (or anything else)
So I plan to make a structure that I can pull the batteries out of when I need them for mowing or cycling.
This will have the ability to charge and discharge the batteries on rules so that
no battery is trying to charge or discharge at the same time
the fullest battery charging to full (to ensure I always have one I can take out when I need it) (maybe 2)
It will know my solar output (3kw array) and will know if my car (leaf24) is plugged in and will charge if there is excess solar but only if the car isn't charging.
please let me know of any potential worries people can think of here and I will try to post some build photos as I go.
in the 4ah flavour I have 24ah.
in the 2.6ah type I have 10.4ah
this is approx. 1.2kwh so far
I also have about 8 empty cases with the bms' that I intend to put new cells in too.
I have plenty of chargers and simplistically I am going to go with simple double throw relays hopefully will ensure they are never short circuited. (also they will be fused on the dc side)
Later I would like to investigate whether the batteries could be charged by a non-oem charger so more slowly, or turn down the oem charger. My aim is to never have to open the toolpacks up. The chargers I am not so precious about.
I bought into quite heavily one type of 40v toolpack battery, which I also can power a mower, strimmer and mine and my wife's ebikes.
Kind of irrelevant which battery it is but it comes in 2.6ah and 4ah at 40v nominal 10s2p inside.
They were sold by b&q in their Macallister brand (blue and grey, then later black and blue)
homebase under qualcast (green and black)
and now argos under spear and Jackson (black and red)
Ive been buying these 2nd hand off ebay whenever ive seen them for cheap with the idea of putting new cells in failing ones but mainly using them on my ebikes until they do fail and they have been great.
So I already have a plastic printable design to hold the battery to the bike (or anything else)
So I plan to make a structure that I can pull the batteries out of when I need them for mowing or cycling.
This will have the ability to charge and discharge the batteries on rules so that
no battery is trying to charge or discharge at the same time
the fullest battery charging to full (to ensure I always have one I can take out when I need it) (maybe 2)
It will know my solar output (3kw array) and will know if my car (leaf24) is plugged in and will charge if there is excess solar but only if the car isn't charging.
please let me know of any potential worries people can think of here and I will try to post some build photos as I go.
in the 4ah flavour I have 24ah.
in the 2.6ah type I have 10.4ah
this is approx. 1.2kwh so far
I also have about 8 empty cases with the bms' that I intend to put new cells in too.
I have plenty of chargers and simplistically I am going to go with simple double throw relays hopefully will ensure they are never short circuited. (also they will be fused on the dc side)
Later I would like to investigate whether the batteries could be charged by a non-oem charger so more slowly, or turn down the oem charger. My aim is to never have to open the toolpacks up. The chargers I am not so precious about.