I have a small dilemma
I have a 24vdc batt powered system. some stuff runs off of 24v, some 12v, and some I need to inverter up to 120vac60Hz. I have all the components but ran into a situation that I am not sure what the best approach is.
One item is a MiniX PC that runs on 12vdc. It came with its own 120vac to 12vdc power supply. But I also have a 24v-to-12v DC DC converter module. This module however will burn 20mA with no load.
So, what's my best option, use the 120vac/12vdc that came with the PC, plugged into a true sine 89% efficient inverter, of just go all dc and burn the 20mA.
I assume these tiny power supplies that come with devices like this are crude dc-dc converters too, so they too probably burn some mA w/ no load.
As a side note, the 24vdc I have are two big 100AH 12v batts in series. The idea to use only 24vdc is so that the batts drain off at about the same rate. An option I have is to wire the PC to just one batt. The PC power supply is rated 12v 36watt, but I do not think the PC pulls 3A (its a tiny fanless PC) . Online posts say this PC is approx 10w, but with my two cameras the total is around 12w, so lets say 1A. I can test later as needed, but 1A sounds about right from the data I have.
With wiring direct to one batt I then have one less component to worry about, but then the batts will not discharge at same rates. The whole system runs on batts for about 8hrs a day, and after that it goes back onto a batt charger.
Or yet another option, LM7812 linear, I just not sure how much power this wastes.
Any suggestions?
I have a 24vdc batt powered system. some stuff runs off of 24v, some 12v, and some I need to inverter up to 120vac60Hz. I have all the components but ran into a situation that I am not sure what the best approach is.
One item is a MiniX PC that runs on 12vdc. It came with its own 120vac to 12vdc power supply. But I also have a 24v-to-12v DC DC converter module. This module however will burn 20mA with no load.
So, what's my best option, use the 120vac/12vdc that came with the PC, plugged into a true sine 89% efficient inverter, of just go all dc and burn the 20mA.
I assume these tiny power supplies that come with devices like this are crude dc-dc converters too, so they too probably burn some mA w/ no load.
As a side note, the 24vdc I have are two big 100AH 12v batts in series. The idea to use only 24vdc is so that the batts drain off at about the same rate. An option I have is to wire the PC to just one batt. The PC power supply is rated 12v 36watt, but I do not think the PC pulls 3A (its a tiny fanless PC) . Online posts say this PC is approx 10w, but with my two cameras the total is around 12w, so lets say 1A. I can test later as needed, but 1A sounds about right from the data I have.
With wiring direct to one batt I then have one less component to worry about, but then the batts will not discharge at same rates. The whole system runs on batts for about 8hrs a day, and after that it goes back onto a batt charger.
Or yet another option, LM7812 linear, I just not sure how much power this wastes.
Any suggestions?
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