Lux hybrid 3.6 and 2x4.8 storage. Only using 3.2kw of discharge.

Solarchaser

I'd say that I'd expect about 3.4kw, as that's what I get with 4x 2.4, so you should get the same with 2x 4.8kw

It's interesting that the hybrid only says 66A though, I'm sure my acs says 70A and that may be the difference. 

Mine used to do 3.6kw, but at some point that went to 3.4kw and its never came back up, I assumed lux decided 68a was safer than 70A

Reed_Richards

arms said:
... Looks like I'll need to swap out the immersion element to something smaller.

In principle you could get the high-power equivalent of a dimmer switch and install that externally, then just dial down the power being drawn by your immersion heater.  I have thought about doing that for winter but the ones I have found have exposed terminals, a feature I don't like.  All solar diverters like the iBoost incorporate the electrical component that will do the "dimming".

arms

Reed_Richards said:

arms said:
... Looks like I'll need to swap out the immersion element to something smaller.

In principle you could get the high-power equivalent of a dimmer switch and install that externally, then just dial down the power being drawn by your immersion heater.  I have thought about doing that for winter but the ones I have found have exposed terminals, a feature I don't like.  All solar diverters like the iBoost incorporate the electrical component that will do the "dimming".

Diverters are in the £350 to £450 range which seems which seems expensive. I’ve bought a sonoff 25a powr3 smart energy monitor and switch for £33 and it’s goin in an enclosure so could add something like you discribed.

Reed_Richards

I have no idea if this product is good or safe but it seems to be an example of the sort of thing I referred to: https://www.amazon.co.uk/WINGONEER-Electronic-Regulator-Thermostat-Controller/dp/B01LXLU3SD/

QrizB

Reed_Richards said:

I have no idea if this product is good or safe but it seems to be an example of the sort of thing I referred to: https://www.amazon.co.uk/WINGONEER-Electronic-Regulator-Thermostat-Controller/dp/B01LXLU3SD/

If anyone is tempted, I suggest you spend the extra couple of quid for one with a fan. They run very hot otherwise.

(Also, all the ones I've seen are fused at 10A so don't turn the wick up to max on a 3kW immersion heater or you'll blow it.)

Reed_Richards

If it's based on a Silicon Controller Rectifier it should be 99.5% efficient so that would be 15 W at 3 kW drawn.  I would not have thought 15 W would require a fan.  Some of the solar diverters seem to require a fan but I assumed that was just bad electronic design.  If you get one that is rated up to 3 kW then it really ought to come with a 13 A fuse.

QrizB

Reed_Richards said:

If it's based on a Silicon Controller Rectifier it should be 99.5% efficient so that would be 15 W at 3 kW drawn.  I would not have thought 15 W would require a fan.  Some of the solar diverters seem to require a fan but I assumed that was just bad electronic design.  If you get one that is rated up to 3 kW then it really ought to come with a 13 A fuse.

Here's a Big Clive teardown of one, if you're interested.

https://www.youtube.com/watch?v=_4PwYm_7HKg

Reed_Richards

Ideally it would incorporate a zero crossing SCR so you don't get the current surge and the potential for radio interference.