Two inverters?

Discussion about any electrical topic except 240 volts. Solar, converters, inverters, lights, battery chargers, etc
grizzzman
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Re: Two inverters?

Post by grizzzman »

Barboots wrote: Sat Nov 18, 2017 3:38 pm You also need to consider the type of 240V equipment you need (want) to run off each inverter supply, and whether you are provided adequate protection when doing so. Multiple Class 1 (three pin) devices should not be used off the same inverter supply unless either the inverter or its installation provides suitable protection.

We run a BitDeals W7 to the whole of the van via an RVD. When economising low level, long duration consumption we run a little Waeco 300W, and only use it for Class 2 (two pin) equipment.

Cheers, Steve
I'm in the USA Steve so I'm powering 120V from 12V. We do have 3 prong and two prong. I'm thinking about a dedicated receptacle as for now. The big inverter will be used for a kureg coffee maker and short runs on the microwave. That way I could use the small unit on the receptacle's throughout the trailer.
Thanks Steve
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grizzzman
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Re: Two inverters?

Post by grizzzman »

Swisslulu wrote: Sat Nov 18, 2017 12:45 pm We also run two inverters in our van. Not by design but when we bought this van it had a 300w inverter wired to 50% of the outlets, the rest were wired for 240v. As we were installing Lithium we wanted a more powerful inverter to run the big ticket items - hot water system, coffee machine etc. so we had an 1800w Xantrex, which has an automatic transfer switch, wired to the “non-inverter” points. When camped, the 300w is on all the time for charging phones, laptops etc. We only turn on the large inverter when we need to run a heavy duty appliance. As soon as the job is done, it’s turned off. Apologies if I have stuffed up any of the terminology but hopefully you get the drift.
Ya I wish I had LFP. Just have FLA for now. I was gifted 2 GP 31s . So I have decided to run them tell there toast. Perhaps then I will go with LFP. The separate plugs idea has merit,as does an auto transfer switch.
Thanks Swisslulu
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grizzzman
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Re: Two inverters?

Post by grizzzman »

bagmaker wrote: Sat Nov 18, 2017 4:47 pm I am a bit of an electrical nufnuff but would it be possible to run a little PSW AND then a grid-tie inverter like is typical in household solar setups?
These are usually 24 or 48VDC but often cheaper than the equal output in watts for a mobile inverter.
I am thinking the larger inverter would sense the smaller signal and match the sinewave
Or am I missing something as usual :D
Hum... I will look into that but I already have the inverter's.
Thanks' bagmaker
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grizzzman
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Re: Two inverters?

Post by grizzzman »

dapope wrote: Sat Nov 18, 2017 10:32 pm Have a 350w inverter for all the small stuff and a 3000w w7 to do the heavy lifting. I do have to pug out one to use the other
That would be the simplest solution.
Thanks dapope
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Barboots
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Re: Two inverters?

Post by Barboots »

I thought everyone was videoing themselves smashing their Kureg machines and uploading it to social media 🤣

Just bear in mind that an inverter wired to multiple power outlets can pose a safety risk if more than one three pin device is plugged in (and the outlet switched on). Also, don't forget to turn off your battery charger if it's plugged in.

Cheers, Steve
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Re: Two inverters?

Post by Busman »

Why is that Steve ?
We use a dozen things at once wih no problems, aircons, elec oven, induction cooktop, 240 rangehood, elec kettle etc etc
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Barboots
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Re: Two inverters?

Post by Barboots »

It's to do with isolation. I'm not an electrician, so I'll probably use the wrong terms if I try to explain it technically.

The crux is... it's not that you can't practically use multiple Class 1 appliances from an inverter supply, it's a safety issue in doing so. If you wish to be afforded the same electrical protection you have when connected to mains via an RCD, your RV must be fitted with an RVD. These do a similar task, but monitor for fault conditions in different ways.

Hopefully Mr T1 comes in to save me from drowning here 🤣

Cheers, Steve
grizzzman
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Re: Two inverters?

Post by grizzzman »

Could you explain what RCD and RVD mean.
Thanks Barboots
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Re: Two inverters?

Post by BruceS »

RCD = residual current device
RVD = residual voltage device

RCD's are compulsory on all houses and other electrical installations.
https://www.electricalsafetyfirst.org.u ... explained/
RVD's are more like snake oil. (just my opinion)
https://www.rvdsafe.com.au/product/resi ... evice-rvd/

Not many people got electrocuted even before BOTH of these devices were invented.
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Vik351
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Re: Two inverters?

Post by Vik351 »

BruceS wrote: Mon Nov 20, 2017 9:50 am RCD = residual current device
RVD = residual voltage device

RCD's are compulsory on all houses and other electrical installations.
https://www.electricalsafetyfirst.org.u ... explained/
RVD's are more like snake oil. (just my opinion)
https://www.rvdsafe.com.au/product/resi ... evice-rvd/

Not many people got electrocuted even before BOTH of these devices were invented.
Like tempering valves on your hot water system... Spent 1/2 me days disabling the things so folk with a instantaneous heater could get hot water ...!!!

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vik... But leave the Murray...
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