Phil56
Free Member
Thus far, all my numpty questions have been answered with good humour and kindness. This one may really test your patience!
I am trying to get my head round batteries and power consumption. As I understand it (and that's probably overstating things) you look at all the things you are running and add up the combined wattage. Then you divide that by the voltage you are running on (12 or 230) and that will give you the amps you are burning. The batteries are rated in Ah, telling you for how many hours they will produce 1 amp. So if you are burning 5 amps, then divide the figure by 5 and that will tell you how long the battery will last. IF (big if) I have got that right, then three questions, please:
1. We have been advised to buy a TV for the MH that runs of 12 or 230v. If the formula above is right, then running something off a 12v battery (eg the leisure battery) will draw a lot more amps, than running it off 230. That sounds wrong to me - but that's what the figures suggest. Is that right?
2. If you were running an inverter off the leisure battery, converting 12v to 230v, what effect does that have on battery consumption. I'm sure it gets worse, but how do you calculate the Amps being consumed?
3. So - having done all this I then read somewhere that you should only run a leisure battery down to 50% capacity before recharging. If that is so it suggests to me that a 100Ah battery is, in reality, a 50Ah battery. Can that be right?
Forgive me if these questions have been answered before. I have trawled the forum, but couldn't find anything.
Thanks all,
Phil
I am trying to get my head round batteries and power consumption. As I understand it (and that's probably overstating things) you look at all the things you are running and add up the combined wattage. Then you divide that by the voltage you are running on (12 or 230) and that will give you the amps you are burning. The batteries are rated in Ah, telling you for how many hours they will produce 1 amp. So if you are burning 5 amps, then divide the figure by 5 and that will tell you how long the battery will last. IF (big if) I have got that right, then three questions, please:
1. We have been advised to buy a TV for the MH that runs of 12 or 230v. If the formula above is right, then running something off a 12v battery (eg the leisure battery) will draw a lot more amps, than running it off 230. That sounds wrong to me - but that's what the figures suggest. Is that right?
2. If you were running an inverter off the leisure battery, converting 12v to 230v, what effect does that have on battery consumption. I'm sure it gets worse, but how do you calculate the Amps being consumed?
3. So - having done all this I then read somewhere that you should only run a leisure battery down to 50% capacity before recharging. If that is so it suggests to me that a 100Ah battery is, in reality, a 50Ah battery. Can that be right?
Forgive me if these questions have been answered before. I have trawled the forum, but couldn't find anything.
Thanks all,
Phil