cherod
Well-known member
thats a pretty good price ,,, how could you tell if it not a pure ?
Any Recommendations for a 1000/2000w pure sign wave inverter
- Thread starter Andrew_Trayfoot
- Start date
Concerto
Well-known member
Before I bought this one I did a lot of checking and remember seeing a test report confirming it was a pure sign wave not a modified sign wave. They do also manufacture modified sign wave inverters at a much lower price. They are not resellers but manufacturers selling their own products.
PaulRainbow
Well-known member
It's entirely your choice, but using unfused croc clip cables is asking for trouble.
Can i ask, how do you use it ? Do you just plug the microwave into it, or does it connect to you onboard 3 pin sockets ?
Concerto
Well-known member
At present I do not have a microwave. Anything is plugged directly into the inverter. I will investigate the Anderson clips and an inline fuse. Thank you for you advice.
PaulRainbow
Well-known member
You're welcome.
CLB
Well-known member
I bought one of these, mainly cos it had a wired remote, and can confirm, after putting it on a scope, that it is pure sine wave.
Edecoa Inverter
Edecoa Inverter
Andrew_Trayfoot
Active member
Thank you all.
HunterWanderer
Member
Just to say I run my 700w microwave with this £37 inverter without any problems
eBay item number:
353116763220
Andrew_Trayfoot
Active member
Do you have a link to the hard wired version?
duncan99210
Well-known member
Sorry, but no I don’t. I identified on eBay, told my friend that the one you need to order and he then got it via his account.
However, this one has terminals as well as a socket, so will do the same job Power Inverter 3000 Watt Pure Sine Wave 12V & Wired Remote Switch C Series | eBay .
Andrew_Trayfoot
Active member
Thanks, think the other one is closer to my budget ?
duncan99210
Well-known member
Car Power Inverter 2000W Pure Sine Wave Inverter 24V DC TO 240V AC LED DISPLAY 714686713412 | eBay this one is a bit cheaper but also has mains output terminals. Search for “hard wired 2000 watt inverter” on eBay.
pvb
Well-known member
Maybe I'm missing something, but why not just wire it to a 13A plug which goes in to the inverter?
PaulRainbow
Well-known member
It's getting late, so i'll be brief, not aimed at anyone in particular and at risk of repeating myself:
Do not underestimate how dangerous an inverter can be. Just because it's a little box connected to your batteries does not mean it cannot kill you. The 240v AC current from an inverter is the same stuff that comes down the fat cables to your house. If not treated with due respect it can kill you stone dead.
Inverters with 3 pin sockets. These are generally best used stand alone. Plug your appliances directly into the sockets, or use an extension lead. Possibly fit a socket or two and connect to the inverter with a suitable cable, plugged into the inverter (basically a posh extension lead). It is possible to connect some of these to the boats onboard consumer unit, via an appropriate changeover switch, but it must be remembered that to do so, the neutral and earth must be bonded at the inverter or the RCD will not work. This would mean bridging the connections in the plug that's plugged into the inverter, but a great many of this type of inverter cannot have this connection made.
If the inverter has screw/bolt on terminals it may be possible to use it as stand alone (as above0 or hard wired to the boat consumer unit, via a suitable changeover switch. As with any inverter (indeed, any AC power source) the neutral and earth must be bonded at the inverter or the RCD will not work. But do not assume that just because it has bolt on terminals the neutral/earth are bonded (or can be bonded).
So the golden rule here (and this really is a golden rule, absolutely set in stone) is that if the inverter cannot have the neutral and earth bonded at the inverter, you absolutely must not, under any circumstances, connect it to the boats consumer unit and that includes making leads up to plug it into the incoming shore power inlet.
Also, the cables from the battery to the inverter must be fused at the battery.
Please, stay safe.
Do not underestimate how dangerous an inverter can be. Just because it's a little box connected to your batteries does not mean it cannot kill you. The 240v AC current from an inverter is the same stuff that comes down the fat cables to your house. If not treated with due respect it can kill you stone dead.
Inverters with 3 pin sockets. These are generally best used stand alone. Plug your appliances directly into the sockets, or use an extension lead. Possibly fit a socket or two and connect to the inverter with a suitable cable, plugged into the inverter (basically a posh extension lead). It is possible to connect some of these to the boats onboard consumer unit, via an appropriate changeover switch, but it must be remembered that to do so, the neutral and earth must be bonded at the inverter or the RCD will not work. This would mean bridging the connections in the plug that's plugged into the inverter, but a great many of this type of inverter cannot have this connection made.
If the inverter has screw/bolt on terminals it may be possible to use it as stand alone (as above0 or hard wired to the boat consumer unit, via a suitable changeover switch. As with any inverter (indeed, any AC power source) the neutral and earth must be bonded at the inverter or the RCD will not work. But do not assume that just because it has bolt on terminals the neutral/earth are bonded (or can be bonded).
So the golden rule here (and this really is a golden rule, absolutely set in stone) is that if the inverter cannot have the neutral and earth bonded at the inverter, you absolutely must not, under any circumstances, connect it to the boats consumer unit and that includes making leads up to plug it into the incoming shore power inlet.
Also, the cables from the battery to the inverter must be fused at the battery.
Please, stay safe.
FlyingGoose
Well-known member
MAny thanks for that much appreciated
Can I ask a wee question to tax your brain,
If the inverter is not earth bonded is it ok to use a double pole RCD I might have that mixed up , but I assume the cheaper models have a floating earth.
Or I’m of the button .
Had a wee whisky , anyways will a double pole RCD unit help to what you were explaining
PaulRainbow
Well-known member
If the inverter is not neutral/earth bonded it should not be connected to the boat systems.
Andrew_Trayfoot
Active member
Is there a way to test a particular inverter to see if it will support bridging the earth/neutral?
PS thanks for your very detail and informative post.
PaulRainbow
Well-known member
There are ways, but it's not something i'd want to give advice about.
Inverter threads on here are the most dangerous ones by far, even more dangerous than the recent 3-phase thread. People fit them and wire them up in the most peculiar ways and just because they seem to power the appliances they they plug into them they assume they are working properly. It seems a lot of people consider price before safety.
So my advice is, if it has a 3 pin plug, plug your appliances into it, with or without an extension lead. If you want an inverter to power onboard electrical systems, buy a decent one with bolt on cable connections, that can have neutral/earth bonding.
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CLB
Well-known member
Seems awfully cheap for a 2KW pure sine wave. I suspect maybe it's really modified sine wave.
Andrew_Trayfoot
Active member
I'd be interested to know what the issues are... without any advice on what to do.
As of now I have no shore power system at all. My current plan is something very simple:
Shore power cable to a galvonic islator then garage type consumer unit.
Bond earth to boat negative.
2 single sockets in gally area (safely away from the sink) for a kettle and a microwave.
Double socket with usb charging ports for other stuff if required.
That will all work fine when away on holiday in marinas. Boat lives on a swinging mooring so would not normally be connected to mains.
I would also like to power the 600w microwave (1000w input) to heat the odd pasty etc (2 to 3 mins max) when out for the day. I will run the engine to mitigate the demand on the battery.
So what is the issue with connecting the very limited shore power system into an inverter when not in a marina?
Potentially I could just have a second socket on an 'extension lead' for use with the inverter/microwave as there is no space in the gally area for the microwave.
I have no other need for 240v when not in a marina...