Induction cooktop run off an inverter

Rob Mueller schrieb/wrote
> I see no reason to remove the LPG system from the GMC.

for me it means that I do not have to invest roughly 2500EUR into my GMC
to make it street legal in Germany. German authorities do not like ASME
certified stuff in a motorhome, it has to be TüV certified. Also, quiet
a few tunnels do not allow LPG carrying vehicles. I do not want to
repeat the endeavour I had in front of the Boston tunnel where I had to
manoeuvre the GMC away from the toll collector in the middle of rush
hour ;-)

I do like LPG for the fridge in the 26', but the 23' will be
all-electric, current plans call for ~400Ah of LiFePO4 battery, plus
utilizing a gasoline powered heater for the cooling water plus some fan
powered water-to-air heating solution.

--

Best regards

Peer Oliver Schmidt
PGP Key ID: 0x83E1C2EA

'76a Eleganza II 26', VA
'73 Sequoia 23', Germany, SH
 
Peer,

I guess I should have noted that I was talking about a GMC in the USA.

As far as tunnels go the same rule goes for the Holland and Lincoln tunnels between New Jersey and New York, the only legal way to enter or leave Manhattan in a vehicle that has an LPG or other flammable gas container on board is on the upper deck of the George Washington Bridge.

Regards,
Rob M.
The Pedantic Mechanic
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808

-----Original Message-----
From: Gmclist [mailto:gmclist-bounces] On Behalf Of Peer Oliver Schmidt GMC
Sent: Wednesday, October 18, 2017 2:30 PM
To: gmclist
Subject: Re: [GMCnet] Induction cooktop run off an inverter

Rob Mueller schrieb/wrote
> I see no reason to remove the LPG system from the GMC.

for me it means that I do not have to invest roughly 2500EUR into my GMC to make it street legal in Germany. German authorities do not like ASME certified stuff in a motorhome, it has to be TüV certified. Also, quiet
a few tunnels do not allow LPG carrying vehicles. I do not want to repeat the endeavour I had in front of the Boston tunnel where I had to manoeuvre the GMC away from the toll collector in the middle of rush hour ;-)

I do like LPG for the fridge in the 26', but the 23' will be all-electric, current plans call for ~400Ah of LiFePO4 battery, plus utilizing a gasoline powered heater for the cooling water plus some fan powered water-to-air heating solution.

Best regards
Peer Oliver Schmidt
 
> Hi Jerry I am an ex truck driver and have used inverters of every size to power my 110v stuff I went to 110 after going through loads of 12v
> things got tired of burning up coffee pots the inverter opened up a whole new world with me living on the road when my wife and me saw the
> advertisement for the NU WAVE induction cook top I thought this would work great so we got the deal for two of them when we got them we tried it at
> home and it works like a dream but when I put the other one on the truck it would not work so I got a bigger inverter still nothing I then got the
> other one from home and tried it still nothing so I called the company and asked them about it and was told that because of the way they are made
> that they will not work with inverters the nu wave is only 1300 watts and I was pushing it with 2500 and 3000 watt inverters so it must be something
> with the circuitry.

An apology before the start. The below has a lot of things that non-E-freindly people may not get. The problem is that I don't know other ways to
describe some things. If you can form a specific question in normal English, I will do my best to answer it, but that may take so doing.

Until the depression shut us down, I earned a lot of money converting racing sloops to performance cruisers. This involved mainly three things,
comfortable living spaces, workable house electrics and civilized plumbing. These are all things that are absent on race ready boats. The
comfortable living spaces was largely plywood cut to shape, tabbed in and then a final assembly with screws into cleats, the civilized plumbing was
always to include H&C pressure water in both the galley and the head. Adding a shower was difficult and expensive as zero discharge made things
tough. The house electrics was always a big thing because owner never envisioned the complications.

The occasion of running microwaves and a few other things from an inverter was always an issue such that I began to refuse to write a quote to do it.
Anything that used the juice for direct heat or to run a real motor was never any problem, but anything else was an open issue. The real unexpected
gotchya was a color laser printer that the owner needed for business. That would sort of work, but it would periodically go crazy. There was no
indication of why except that it was flawless on shore power. Nothing could tell me what the problem was. Then I put it on a split (that allowed me
access to the individual conductors) and watched the current with a Bell probe. These are an analog device with effectively high frequency response.
When watching the current with my 87, the flying spot would periodically jump. The numeric display would maybe shuffle a last digit. So, I borrowed
a little digital O-scope and looked again. At first it looked good, then it looked like nothing and then it was ragged again as the digital signal
aliased in and out of sync with the scope. Then (from the same tech collector), I borrowed a an old glass Tecktonics. Completely Analog. It showed
me that the power consumption of the printer was all over the place when it tried to run from the inverter because the two were close to the same
switching frequency. I have forgotten the actual model but the inverter was supposed to be a pure sine. Needless to say, it really was not it was
just better than the modified square wave versions. The glass scope confirmed that. It looked pretty good until one expanded the wave form. It was
only a close approximation to a sine with big steps at both ends where it zero switched.

Do I have an answer?
Sorry, I don't. I never saw the issue with the old Heart inverters that had an iron core transformer and a 1.5KVA was most 50# or a rotating machine
that runs a synchronous speed. So I would guess that those are your choices if you want fancy electronics to work reliably.

Matt - Almost glad that he was put out of business
--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan
OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit
 
You can buy an inverter which does in fact produce a good sine wave. Actually, if you look at the Onan waveform, it gets up around 5 - 10% distortion
when it's heavily loaded. Be sitting down when you see what such an inverter is going to cost you. If it's producing a true sine wave, not something
assembled fro a bunch of steps, it doesn't matter what speed the power supply switches. The estimate price of Peer's propane conversion to German
spec might buy one.
I have an old UPS which came out of a transmitter plane when we upgraded to run the whole place sans utility power. This thing kept some of the
computers alive until the genset took load and restarted the transmitters. I put a 35KVA 3 phase UPS in place with about 6 - 7 minutes of batteries
which was more than enough to start the genset. It actually made a better waveform that Ga Power at the location. I run the little one off the house
batteries if I need 5 minutes of A/C for something. One outlet, suitable for my soldering gun or iron or the like.

--johnny
--
76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
"I forgive them all, save those who hurt the dogs. They must answer to me in hell" - ol Andy, paraphrased
 
I wonder if an isolation transformer in 2 in series would kill the
high-frequency component filling in the gaps of the switching inverter. The
key would be to have energy stored in the iron core.

On Wed, Oct 18, 2017 at 7:06 AM, Johnny Bridges via Gmclist <

> You can buy an inverter which does in fact produce a good sine wave.
> Actually, if you look at the Onan waveform, it gets up around 5 - 10%
> distortion
> when it's heavily loaded. Be sitting down when you see what such an
> inverter is going to cost you. If it's producing a true sine wave, not
> something
> assembled fro a bunch of steps, it doesn't matter what speed the power
> supply switches. The estimate price of Peer's propane conversion to German
> spec might buy one.
> I have an old UPS which came out of a transmitter plane when we upgraded
> to run the whole place sans utility power. This thing kept some of the
> computers alive until the genset took load and restarted the
> transmitters. I put a 35KVA 3 phase UPS in place with about 6 - 7 minutes
> of batteries
> which was more than enough to start the genset. It actually made a better
> waveform that Ga Power at the location. I run the little one off the house
> batteries if I need 5 minutes of A/C for something. One outlet, suitable
> for my soldering gun or iron or the like.
>
> --johnny
> --
> 76 26' Eleganza(?) with beaucoup mods and add - ons.
> Braselton, Ga.
> "I forgive them all, save those who hurt the dogs. They must answer to me
> in hell" - ol Andy, paraphrased
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--

*John Phillips*
 
A good line conditioner should be able to convert a modified sine inverter
to a good pure sine inverter.
After thinking about it I would try a unit like
https://www.zoro.com/tripp-lite-power-conditioner-small-tower-18kva-lc-1800/i/G2208823/#tech-specs
and see how it works before I invested in inverter shopping looking for
just the one that works.

On Wed, Oct 18, 2017 at 9:33 AM, John Phillips
wrote:

> I wonder if an isolation transformer in 2 in series would kill the
> high-frequency component filling in the gaps of the switching inverter. The
> key would be to have energy stored in the iron core.
>
> On Wed, Oct 18, 2017 at 7:06 AM, Johnny Bridges via Gmclist <

>
>> You can buy an inverter which does in fact produce a good sine wave.
>> Actually, if you look at the Onan waveform, it gets up around 5 - 10%
>> distortion
>> when it's heavily loaded. Be sitting down when you see what such an
>> inverter is going to cost you. If it's producing a true sine wave, not
>> something
>> assembled fro a bunch of steps, it doesn't matter what speed the power
>> supply switches. The estimate price of Peer's propane conversion to German
>> spec might buy one.
>> I have an old UPS which came out of a transmitter plane when we upgraded
>> to run the whole place sans utility power. This thing kept some of the
>> computers alive until the genset took load and restarted the
>> transmitters. I put a 35KVA 3 phase UPS in place with about 6 - 7 minutes
>> of batteries
>> which was more than enough to start the genset. It actually made a
>> better waveform that Ga Power at the location. I run the little one off
>> the house
>> batteries if I need 5 minutes of A/C for something. One outlet, suitable
>> for my soldering gun or iron or the like.
>>
>> --johnny
>> --
>> 76 26' Eleganza(?) with beaucoup mods and add - ons.
>> Braselton, Ga.
>> "I forgive them all, save those who hurt the dogs. They must answer to
>> me in hell" - ol Andy, paraphrased
>>
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
>
>
> --
>
> *John Phillips*
>

--

*John Phillips*
 
I was trying to ask a similar question on Facebook a couple of weeks ago,
but i think I just confused everyone. What about using two of those small
generators on for your induction cooktop and one for your AC?

> The inverter in this small generator powers the NuWave induction cooktop.
> I wish I could use it to power the roof A/C and leave Onan at home.
> http://www.gmcmhphotos.com/photos/nocat-pics/p63789-
> champion-generator.html
>
> --
> Terry Kelpien
>
> ASE Master Technician
>
> 73 Glacier 260
>
> Smithfield, Va.
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
 
I wasn't even dreaming of using both A/C and cooktop at the same time from any inverter I could afford. I could connect 2 of those units and probably
run a good A/C unit with some lighter duty components than the 44 year old unit up there now, which cools great but takes too much current to start
the compressor. I really need a new roof A/C unit that would start and run on the small and quiet inverter generator. Then of course have to get one
with electric start...didn't see a good way to take the 3500 from HF apart.
--
Terry Kelpien

ASE Master Technician

73 Glacier 260

Smithfield, Va.
 
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