Backup DC power standardization with Photovoltiac battery systems?
Mark Tinka
mark at tinka.africa
Wed Apr 19 13:56:28 UTC 2023
On 4/15/23 03:06, Sean Donelan wrote:
> If both PV battery walls and broadband CPE supported
> Power-Over-Ethernet as a backup power source, that would work too.
> POE supports greater distances than USB-C.
Well, you generally want to only power your devices off the battery if
you are unable to generate power from PV, or if you have a grid outage.
The other issue is if you also want to use the grid as a charge source
for the battery, you are going to need an inverter, in which case
attaching DC loads to a DC bus that contains both the battery and a
standard, el-cheapo hybrid inverter makes things tricky.
If you don't want to use the grid for anything, then your main source of
charge current would be PV. If it's a 48V battery, you will need
something else to step that voltage down for devices on the DC bus that
require less than 48VDC.
Mark.
More information about the NANOG
mailing list