24 volt battery bank?
Other than needing to use a DC-DC converter for the 12 volt system, what problems would there be in going with a 24 volt battery bank for a custom rig? The reason for this is that Magnum Energy has...
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I tried a 24v bank with solar as a test. Worked great. The MPPT controller was more efficient doing 24-24 instead of 24-12 and it also allowed the PWM controller (no buck converter in those) to run a 24v panel which is a lot cheaper per watt than the 12v panels.
Since usually, the PWM controller is much cheaper than the MPPT, the advantage in money was to go 24v panels and PWM controller, but this requires a 24v battery bank. You have to offset that by the cost of your 24-12 converter, unless you use your existing converter as PT suggests, from that big inverter the OP wants.
In another test, running the existing converter from an inverter had about a 4 to 6 amp draw (at 12v not 24v) so that would need some solar to keep up with. AFAIK, the simpler kind of buck converter you can get for that job would be more efficient by using the 24v battery bank as source instead of 120v from inverter.
Since usually, the PWM controller is much cheaper than the MPPT, the advantage in money was to go 24v panels and PWM controller, but this requires a 24v battery bank. You have to offset that by the cost of your 24-12 converter, unless you use your existing converter as PT suggests, from that big inverter the OP wants.
In another test, running the existing converter from an inverter had about a 4 to 6 amp draw (at 12v not 24v) so that would need some solar to keep up with. AFAIK, the simpler kind of buck converter you can get for that job would be more efficient by using the 24v battery bank as source instead of 120v from inverter.
