Battery for nmea

[Frantic]

so how small can i get away with for a stand alone battery that will only power nmea backbone at the moment anyway ,how many AMPS/HRs size for the battery ,i'll only have memory module,etec interface,hds7 touch and power tee connected

in the network im looking @ the remco batteries as it will be fitted in cabin .And it will be recharged most days. would 30amps/24hr size be enougth ?

[Testlab]

You will need to know if any of those devices are powered by the NMEA2K network and if so the power they draw.The HDS7 is not but I don't know if the ETec interfaces are.

Why do you need to keep it powered? The network and connected devices are intended to be powered down and each device will remember its own data and pass that to other devices when the they are switched back on.