Hello,
I want to install a bank of batteries in my motorhome to provide about 300-350Ah of capacity. I intend to use it to power a 350W aircon unit via an inverter. I want to be able to run the cooler for up to four hours so by my calculations, the above should be ok.
AC unit - 350W @ 240V
Inverter @ say 75% efficiency = 467W
Therefore draw from battery = 38.9A say 40A
40A for 4hours = 160A which is about 50% of the total 350Ah capacity.
So, does that look right?
Next, I have a question about the battery bank.
The motorhome has installed as standard an 80Ah leisure battery all wired in to the vehicle alternator. In order to get to my 350Ah target would it be best to install a single 250Ah leisure battery (wired in parallel with the original of course) or three 80Ah leisure batteries again in parallel with the original? (I know this gives 320Ah total not 350 but that is double the 160A requirement.)
Hope that all makes sense.
Thanks in advance for your advice.
Jon
I want to install a bank of batteries in my motorhome to provide about 300-350Ah of capacity. I intend to use it to power a 350W aircon unit via an inverter. I want to be able to run the cooler for up to four hours so by my calculations, the above should be ok.
AC unit - 350W @ 240V
Inverter @ say 75% efficiency = 467W
Therefore draw from battery = 38.9A say 40A
40A for 4hours = 160A which is about 50% of the total 350Ah capacity.
So, does that look right?
Next, I have a question about the battery bank.
The motorhome has installed as standard an 80Ah leisure battery all wired in to the vehicle alternator. In order to get to my 350Ah target would it be best to install a single 250Ah leisure battery (wired in parallel with the original of course) or three 80Ah leisure batteries again in parallel with the original? (I know this gives 320Ah total not 350 but that is double the 160A requirement.)
Hope that all makes sense.
Thanks in advance for your advice.
Jon