Solar immersion device capable of running 6kW immersion

[SolarCity]

I have a customer with a 6kW immersion heater and we are trying to find a device which will cope with this size. All the ones I've seen so far are rated at 13A maximum. Anyone know of a device which could do 6kW?

 

[Steve_rutland]

Could you not run it with a standard Immersun type device but using a suitable external relay to take the load?

 

[SolarCity]

We could, but we have a 10kWp three phase system so we'd never be exporting 6kW of power.

 

[SibertSolar]

A single 6kW element?

 

[SolarCity]

Sounds like it is 3 individual elements but the current supply is 30A so I am assuming that they are connected together in series.

 

[Leesparkykent]

Put it through a contactor and get the solar device to switch the coil

 

[Gavin A]

Sounds like it is 3 individual elements but the current supply is 30A so I am assuming that they are connected together in series.

is it possible to rewire it as a single 2kW?

 

[SolarCity]

Put it through a contactor and get the solar device to switch the coil

It would work ok. But we wouldn't get the proportional control of the immersion heater.

 

[SolarCity]

is it possible to rewire it as a single 2kW?

I've not seen it, but I'd imagine so. This will probably be the route we go down if we can't get a 30A device.

 

[Leesparkykent]

Immer sun? Think these be linked together through the wireless interface up to 5 separate units

 

[SibertSolar]

If 3 separate elements then it can be done easily enough, even if on a single phase, with a bit of rewiring.

 

[davesparks]

Is it a 3 phase immersion heater by any chance? The ones I've fitted in the past were all 6KW.

And there was no option to convert to 3x single phase one end of each element was commoned by a bar brazed across them with a single terminal on the end.

 

[SolarCity]

If 3 separate elements then it can be done easily enough, even if on a single phase, with a bit of rewiring.

The rewiring would be the issue. It'd be a nightmare if not impossible without a bit of destruction.

 

[SolarCity]

Is it a 3 phase immersion heater by any chance? The ones I've fitted in the past were all 6KW.

And there was no option to convert to 3x single phase one end of each element was commoned by a bar brazed across them with a single terminal on the end.

I've only briefly looked at it but I can say that it is certainly only a single phase supply.

 

[davesparks]

I've only briefly looked at it but I can say that it is certainly only a single phase supply.

But is it a single phase immersion?

 

[jason121]

3 x 2kw star at neutral

 

[davesparks]

3 x 2kw star at neutral

All three elements in parallel then i assume?

In theory you could break the star point links and connect as 3 seperate elements.
You'd want an isolator that will cut all of the supplies before it though

 

[7029 dave]

Stick an other 100 panels on the roof.

 

[SolarCity]

3 x 2kw star at neutral

Could be, but if it is then it must have been adapted to single phase. The supply is certainly only single phase.

 

[bxman]

Are there 3 phase diversion devices ?

All the ones I have come accross have been single phase .

When they are switched to diversion load I do not think it matters what the load is . as it is only the surplus PV output that is being diverted I have frequently had a 5 kw load on my I2 diverter and it does not seem to worry it .

While I have it on a big heatsink I am not sure I would want it to regulary do so when switched to bypass mode ; but it has done on the odd occasion when I have forgotten to switch off one of the loads . (2 x 2kw night storage units + 1 x 1200w fire )

If you have 10 Kw across 3 phases the output on any single phase would not overload a single phase diverter on any one of those phases .

If the imersion is running of a single 30amp fuse it must be a single phase load .
So would run of a single phase diverter and not take any more than the diverter decided was surplus energy on the phase to which it was connected IMO.

hope it makes sense and may be of help.