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 > Minimizing inverter usage overnight

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Mike77mastro

Salinas, Ca

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Posted: 05/28/20 04:25pm Link  |  Quote  |  Print  |  Notify Moderator

I have an Allegro RED and want to minimize late night and overnight generator usage when boondocking. I would like to be able to use the entertainment system overnight but don't need the 120vac only fridge or microwave. I set the inverter to cut off at 11.8vdc. Is there anything wrong with popping the breakers that control the micro and fridge overnight and then resetting them in the morning?

GordonThree

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Posted: 05/28/20 04:28pm Link  |  Quote  |  Print  |  Notify Moderator

What is the entertainment system? Might just need a 12v power cord for your television and you can turn the 120v off completely. Turning off the microwave clock isn't going to save you much power, but the fridge certainly will.


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time2roll

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Posted: 05/28/20 04:54pm Link  |  Quote  |  Print  |  Notify Moderator

Yes flip the breakers off and on as needed.

If your battery is in good shape you should not get to 11.8 volts unless there is a heavy load. Or does the generator auto start at 11.8 volts? If your battery voltage seems to sag more than expected maybe you need to update the charging system so you are closer to 100% as you go into the evening.


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Lwiddis

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Posted: 05/28/20 04:58pm Link  |  Quote  |  Print  |  Notify Moderator

Minimize (zero) generator use with a adequate solar system...panels, controller and batteries. Fix your issue, don’t apply a bandaid. Without a need for A/C running a generator at night isn’t my cup of tea.

* This post was edited 05/28/20 05:04pm by Lwiddis *


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ajriding

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Posted: 05/28/20 04:59pm Link  |  Quote  |  Print  |  Notify Moderator

No, nothing wrong to do this; flipping the circuit breakers is the correct way to keep fridge from trying to run off your 120 volt alternating current (AC) inverter. The fridge should stay on propane, the ACond has no power, and you can use your outlets for 120v AC. I assume you have the inverter wired into the electrical panel? Not everyone wires the inverter in as it is usually just one or two items that need inverter power.

Keep the inverter off when not in use, it draws a lot of power just being on.

I once had mine wired so the inverter could not feed the ACond or the fridge.
The fridge and ACond ran off the panel.
The panel fed the outlets but first went through a 3-way switch that selected either panel electricity or inverter electricity (or off).
The inverter was not able to back-feed the panel, and either way the switch was tossed presented no danger. I could be plugged into shore power and have the inverter on and still there was no danger, because the 3-way switch only selected one. Way complicated for me to come up with this the first time btw, but much safer than trying to remember circuit breakers and if I was plugged into shore or or not.

On my 3 wire electrical AC system both ground and neutral were grounded, so I had the switch control the hot lead from the panel.

pianotuna

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Posted: 05/28/20 05:16pm Link  |  Quote  |  Print  |  Notify Moderator

I'd set the cut off a little higher unless you are using an LI battery bank.

Consider running a dedicated power outlet from the inverter to the entertainment system.


Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp hours of AGM in two battery banks 12 volt batteries, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.

BFL13

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Posted: 05/28/20 06:20pm Link  |  Quote  |  Print  |  Notify Moderator

Yes, you can shut off the 120v fridge overnight. It will stay cold enough when you don't open the doors.

You can unplug the television when not in use. If you just turn it off it stays on in standby and draws a little power. It is convenient to have the TV and DVD plugged into a power bar with its own shut off switch.

No idea why you would make the inverter shut off at a higher voltage. You have a "loaded voltage" which is lower when running things. If the battery is getting down, but still ok, you might be getting a low loaded voltage and have the inverter shut off and kill the movie just before you find out "who done it".


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pianotuna

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Posted: 05/28/20 06:43pm Link  |  Quote  |  Print  |  Notify Moderator

BFL13,

Because 11.8 is way below 50% state of charge.

DownTheAvenue

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Posted: 05/28/20 07:00pm Link  |  Quote  |  Print  |  Notify Moderator

ajriding wrote:

The fridge should stay on propane,


The OP stated his refrigerator was 120 volt only.

BFL13

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Posted: 05/28/20 07:03pm Link  |  Quote  |  Print  |  Notify Moderator

pianotuna wrote:

BFL13,

Because 11.8 is way below 50% state of charge.


11.8 loaded voltage can be anything more than that resting, depending on the wiring to the inverter and the load.

Even then, watching the movie, the furnace comes on and drops the voltage even more. Who wants the movie to shut off every time the furnace comes on? It's bad enough having to turn the sound up until the furnace cycles off!

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