Expanding AC distribution panel
I'm looking at options for expanding the AC dist. on a Parallax 6300 dist. panel.
Forum Discussion
"The 75 amp converter will pull approx. 1690VA from 120 input when doing 75 amps/14.x output. (that converter has PF of 0.73) So sharing a circuit with the fridge on electric is dubious..>> It would work if the converter were only doing regular 13.6v work at low amps output <<.
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14.075 amps? I would need to ask how often is a 75 watt converter going to pull ~14 amps from AC when connect to no batteries and only used for 12 volt lighting and an absorption refrigerator?
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To clarify as needed---
I have a 75 amp PowerMax(ADJ.) same specs as unit you are getting. Running it set at 14.8vDC from a 3000w Honda inverter gen, and using a Kill-a-Watt meter, I got:
123.8v, 13.64a, 1693VA, 1241w, PF 0.73 as 120v input, with DC output
75.0 a, battery v 14.08 rising. So 1056w output using the 14.08 or else 1110w using the set 14.8.
1056w out for 1241w in is 85% efficiency, similar to other converters' spec efficiencies.
EDIT-BTW, IMO that way to measure efficiency is self-serving by ignoring the PF. I think it should use the output with the DC voltage set (14.8) and not the battery voltage at the time, but also should use the actual draw from the power source as the input, so that would make it 1110/1693 = 65.6%
On inverter efficiency, there is no advantage for PSW over MSW when running resistive loads like a toaster, but there is when running inductive loads like a microwave or a motor. But there are MSW inverters rated to run motors--they get it done. The PSW ones cost way more, so there is the usual trade-off.
I don't mind running the microwave on MSW with a motor rated inverter. Takes a little longer to cook something but so what? Actually it uses less battery in AH even though it takes longer, because the PSW would draw 1500w, (150 DC amps) while the MSW draws more like 120 DC amps for say two minutes longer.
The main reason to have the inverter is to make proper toast in the early morning before generator or noise hours. If you sleep in till generator noise hours are in effect, then make your toast, that's different. :)
--------
14.075 amps? I would need to ask how often is a 75 watt converter going to pull ~14 amps from AC when connect to no batteries and only used for 12 volt lighting and an absorption refrigerator?
______
To clarify as needed---
I have a 75 amp PowerMax(ADJ.) same specs as unit you are getting. Running it set at 14.8vDC from a 3000w Honda inverter gen, and using a Kill-a-Watt meter, I got:
123.8v, 13.64a, 1693VA, 1241w, PF 0.73 as 120v input, with DC output
75.0 a, battery v 14.08 rising. So 1056w output using the 14.08 or else 1110w using the set 14.8.
1056w out for 1241w in is 85% efficiency, similar to other converters' spec efficiencies.
EDIT-BTW, IMO that way to measure efficiency is self-serving by ignoring the PF. I think it should use the output with the DC voltage set (14.8) and not the battery voltage at the time, but also should use the actual draw from the power source as the input, so that would make it 1110/1693 = 65.6%
On inverter efficiency, there is no advantage for PSW over MSW when running resistive loads like a toaster, but there is when running inductive loads like a microwave or a motor. But there are MSW inverters rated to run motors--they get it done. The PSW ones cost way more, so there is the usual trade-off.
I don't mind running the microwave on MSW with a motor rated inverter. Takes a little longer to cook something but so what? Actually it uses less battery in AH even though it takes longer, because the PSW would draw 1500w, (150 DC amps) while the MSW draws more like 120 DC amps for say two minutes longer.
The main reason to have the inverter is to make proper toast in the early morning before generator or noise hours. If you sleep in till generator noise hours are in effect, then make your toast, that's different. :)
