@kezo I know yr da man to ask. Just come across this thread. I’ve had my ePod installed just last week & my Ohme app is reporting the same as Phaedra. load limit 60A – max charge 32A – & national grid dropped in a 80A fuse the day before the charger was installed. Are these not the optimal settings? on a side note, national grid didn’t replace the seal on the cut-out after replacing the new fuse! is this going to cause issues at a later date? Tia Tom…
By default installers must assume that the cut-out fuse is rated at 60A, (not what it says on the fuse carrier, which states the maimum fuse size of the carrierand not the fuse inside) if the service head is 1940’s onwards and in good condition. Providing the installer maximum demand calculation is not >60A installation of the charger can go ahead without contacting the DNO for a cut-out fuse upgrade.
Where the cut-out fuse size is known, the load limit should be set to match that of the cut-out fuse rating, which in your case is 80A. However installers often forget or couldn’t be bothered to go int the chargers menu to change it!
When Ohme carried out the maximum demand calculation, it was deemed appropiate for an 80A fuse needed to be fitted. There is a simple method to calculating maximum demand based on the 18th edition wiring regs onsit guide. To do this take 100% of the largest rated MCB in your consumer unit, then add all the other MCB sizes together and find 40% of the total, you then add this number to the largest MCB rating to get your maximum demand.
Does it matter all depends on what apliances you are using at the same time as charging your car. If you get near to the set 60A load limit, the charger will throttle and slow down the speed in which it is charging your car untill household load decreases and the charger then speeds back up to maximum charge. However, if the load limit was set to 80A this would not happen, as its at optimal settings 🙂