Solar Panel installation

pinnks

I guess I am a bit of a fan, whatever that means, as I think the product is well thought through.

If you read the manual, available on their website, you will see that each immerSUN has three outputs. Each is switched consecutively and each can have a max 3,200W resistive load. That could be 1, 3kW element on each output or 3, 1kW elements on each.

You can then cascade up to 5 immerSUNs, with one acting as the primary, attached to the sensor, and the others as slaves, hanging off the primary and controlled by it.

The slave is switched on when there is excess power over and above that being used by the primary. So, if you have a very large system, or only one heater on the primary, then a slave or slaves may make sense but if you have all necessary heaters on the one unit, or a 4kWh system then a second unit is probably not worth the expense.

I could have run a cable downstairs on output 2 or 3 to where I have my space heaters but that would have been fiddly or expensive or both, so I opted for a slave unit that is portable and can be used wherever.

My 5.25kWh system is big enough to power hot water plus heater in the autumn/spring but this week has not done much at all.

I you were to go, say 10kWp, then two or even three units could make sense but for a 4kWp system hot water and one or two heaters could hang off a single unit unless like me you don't want visible wires running up and down the stairs and in and out of rooms for 6 months a year...

At the end of the day a 4kWp system will only produce a certain amount of leccy- perhaps 30kWh on a brilliant summer day but only 0.5kWh on a grey winter day - and you have your house's base load and immersion heater requirements (about 3kWh per day for us) to service before there is anything left for other diversion.

Heedtheadvice

Thanks for that explanation. It all seems quite logical to me. Having also now read another of your posts on the subject it shows a good bit of lateral thinking to have a 'portable' system!:T