SWW
Guest
Think I mean 36V!!
terrydactyll
Guest
Look on the power adapter than came with the bikes - this will be a mains charger and written on will be a number of Amps. This will be the number of Amps required at the mains voltage of 240 volts. Your inverter will receive power at 12 volts (nominally) and convert this to power at 240 volts. To supply the same power at 240 volts as the inverter receives at 12 volts will require a stepup in current (Amps) of 240/12 = 20 to 1
For example, if your charger requires 2 Amps at 240 volts then your inverter will draw 20*2 = 40 Amps from the battery. Multiplying 40*12 volts gives 480 watts. Give yourself a margin of error for the inverter inefficiency and the battery being less than 12 volts gives an inverter of 600 watts. If the current written on power adapter is greater than 2 amps will you will need a larger inverter and vice versa
Bear in mind that that you do not need an expensive true sine wave inverter, the pseudo version will do as you are not powering sensitive equipment here so the cost should not be too painful
Hope this helps
Terry
For example, if your charger requires 2 Amps at 240 volts then your inverter will draw 20*2 = 40 Amps from the battery. Multiplying 40*12 volts gives 480 watts. Give yourself a margin of error for the inverter inefficiency and the battery being less than 12 volts gives an inverter of 600 watts. If the current written on power adapter is greater than 2 amps will you will need a larger inverter and vice versa
Bear in mind that that you do not need an expensive true sine wave inverter, the pseudo version will do as you are not powering sensitive equipment here so the cost should not be too painful
Hope this helps
Terry