Waynemarlow
E*POWAH Master
Guys its the battery itself that’s limiting the charge current, you could have the potential of 100 amps at the cables but a lead acid gel leisure battery is simply not going to pull that current. Nowhere does he talk about running anything other than charging the one battery.
Lets put this in the realms of something EBikers can relate to. I stress test any battery I build for my EBikes with a draw off of 650Watts as that’s what most modern EBikes are capable of pulling for short periods of time. Now at 12 volts ( car battery volts ) x 20 amps ( size of maximum current allowed by the inline fuse ) = 240 Watts ( Watts used is the real thing we need to use as that is the Power used ) so the Van set up is using about 1/3 rd of the power of an EBike. Now have a look at the size of the connectors between your bike motor and the battery, they are not very big and nothing like the mains cables going to your fuse board which on older houses were 10mmsq and more modern 16mmsq, which is being suggested that should be used nor the size of the main wire in your car going to the starter motor which is typically a 16mmsq wire, sometimes less.
Where am I going with this, well it just so happens that my battery stress rig is connected with 79 strand speaker wire, yes it’s only one metre long but never the less I’m running 2 1/2 times the load than that on the vans cables. Do my wires get hot, yes after about 30 minutes of constant 650watts they get luke warm to the touch, do they melt, nope that’s one of the advantages of speaker wire, very low resistance wire and huge cooling surface areas.
Lets put this in the realms of something EBikers can relate to. I stress test any battery I build for my EBikes with a draw off of 650Watts as that’s what most modern EBikes are capable of pulling for short periods of time. Now at 12 volts ( car battery volts ) x 20 amps ( size of maximum current allowed by the inline fuse ) = 240 Watts ( Watts used is the real thing we need to use as that is the Power used ) so the Van set up is using about 1/3 rd of the power of an EBike. Now have a look at the size of the connectors between your bike motor and the battery, they are not very big and nothing like the mains cables going to your fuse board which on older houses were 10mmsq and more modern 16mmsq, which is being suggested that should be used nor the size of the main wire in your car going to the starter motor which is typically a 16mmsq wire, sometimes less.
Where am I going with this, well it just so happens that my battery stress rig is connected with 79 strand speaker wire, yes it’s only one metre long but never the less I’m running 2 1/2 times the load than that on the vans cables. Do my wires get hot, yes after about 30 minutes of constant 650watts they get luke warm to the touch, do they melt, nope that’s one of the advantages of speaker wire, very low resistance wire and huge cooling surface areas.
