Powering Van 230V From On Board Inverter

[homeless]

Gee Norman hancy accusing me of having FLAT BATTERIES.

Does not happen in my bus as all my batteries start with Li*****

From crank to dinghy and torches in between AHHH except camera as the Nikon's only have the old technology and I wont be replacing them in the near future I think. I give them a hard time as I take lots of photos but they should last a while.

Regards
Brian

[norman]

You mean you ain,t got lipos in yer camera... What are yer a woose or someat

[homeless]

Would if I could Norman.
Regards
Brian

[TigerMK1]

Just ordered replacment batteries for our Olympic camera. Yup, they are lithium.
Steven

[nut17]

Welcome to the exclusive club

Cheers Chris

[dapope]

but, are they LIFeP04.....

[TigerMK1]

but, are they LIFeP04.....

Don't want to crack the little battery open, sure to bugger it. Similar, won't fit the cell checker to them.

[oldtrack123]

[1]Thanks Peter, that was the way I saw it, this was going to be my original system before the combo RVD/RCD came along, it was the only way I could see to get around the multiple class 1 appliance issues and needing to switch neutral links. The neutral link issue was the main concern, if connected to the mains the neutral link would have to be a the supply side, but if the supply failed the UPS side of the inverter would kick in, but now there would be no neutral link, virtually unprotected circuits with multiple class 1 appliances connected.

[2] It appears that this how the Victron Multiplus units operate, if they sense an earth/neutral link on the supply line they automatically open the link they make internally, but if the supply fails or is insufficient they supplement the supply, as far as I see it, this supplemented supply is not protected, if there was a fault and the supply RCD tripped, the Victron inverter would immediately take over all the supply.
[3] As far as I can follow from the schematics, supply power is required to close the double pole relay on the supply line. When the supply failed the relay should open, once the line was broken to the supply neutral the earth neutral would be broken, this should be sensed by the Victron and an internal link made, this would then make the on board RCD’s functional. The issues I have is the whole system relies the supply relay opening both contacts, that circuit sensing there is no longer a link and making the link internally, otherwise the neutral link would remain open, no protection at all offered by the on board RCD’s as there in no earth neutral link at the supply, the inverter.
What happens when the supply comes back on, would it sense the neutral link at the inverter as a short to ground and trip immediately?
[4]There are a lot of very well known brand motorhomes set up exactly this way I believe the owners and the people responsible for setting them up don't see the same potential problems. I think Rich make a copy unit sold via the Jay Car outlets, no idea just how complete the copy is, maybe this is copied as well.

T1 Terry

Hi Terry
I'll give it a try now , just come back if any point is a problem or I have not put it clear enough
[1]AS 3001 actually gives the approved method of permanently wiring
[a]a source that has an earthed neutral
A source that automatically creates an earthed neutral
[c]in both cases the one main RCD should work under an earth fault condition after it
[d]As 3001 also gives the approved method to permanently wire an unearthed neutral power source for the RCD to be fully operational

[2]Those & similar units need to be very carefully, Permanently installed & wired , to ensure safe operation & RCD protection
I am aware of several that were not [shocks resulted ]& I fear many more out there that are in the same boat
That is one of the reasons You will have seen my constant posts suggestingthat anyone with such,check ALL the power OUTLETS for correct RCD operation

It would be better put that "they create an internal earth neutral bond when NO mains power is available"
The main supply sensing relay is the key to the whole operation & is claimed to be fail safe
if the relay sticks "on"[ closed ]you simply do not get the transfer,result no inverter output.
like wise in the other direction the relay senses mains power & pulls in in either case the supply will have an E.N
Electronic do the load sharing job.
A very,very remote possabilty that the transfer would give any problems,IF ALL is correctly wired.....

[4]See [2]
TWO CMCA members have had such installations ,wirecd incorrectly . RCD by passed .
BOTH cases a popular brand

With the RVD combo in the right location, you really do not need RCDs anywhere in the bus /van
Fault dtection could be done by a simple olcb or isolating switch on each circuit
An E >N supply with out a fully functional RCD

Off to bed now, another long day ahead tomorrow

Peter

[nut17]

Just ordered replacment batteries for our Olympic camera. Yup, they are lithium.
Steven

Damn it, when I said welcome to the club, I had read your post as "Olympic Caravan", not "Olympic Camera" I think I may have to get some new reading glasses

Cheers Chris

[T1 Terry]

Just ordered replacment batteries for our Olympic camera. Yup, they are lithium.
Steven

Damn it, when I said welcome to the club, I had read your post as "Olympic Caravan", not "Olympic Camera" I think I may have to get some new reading glasses

Cheers Chris

Was that the Olympic caravan club or the lithium batteries club, Steven has been a lithium battery convert for some time now. There are quite few of them out there, they just stay quite about it, not like us noisy buggers