solar heating and second cylinder

[DeltaT2]

£400 pounds for the tubes alone before any installation.

Ouch that's an awful lot of hot water to pay that back.

It will never happen.

Get real son!! Have you seen the price of gas, oil & leccy??!!!
Are you saying washing a family of 4 all Summer, will not show a substantial saving??!!! Mate, you must be a clueless armchair expert

 

[DeltaT2]

Solar thermal hot water is a complete waste of money in this country
and will never pay for itself.

Might be worth it if you are rigging up something yourself from an old
radiator but otherwise forget the idea.

Save your money and buy more insulation.

What a load of rubbish!! We've been fitting Thermal Solar for the last 25 years here in Scotland, most of these systems have never, ever needed any repair of any kind!! Unlike your £13K+ PV systems pish poor performance & an inverter that'll pack in 5 years. Many homes with TS systems do not heat any water during Summer months and will pre-heat hot water all year round.

EV tube panels can be bought for under £400, it's as cheap as chips to install & a system that'll last a lifetime..............ROI is the best of any of the Greenwash products.

A thermal siphoning system has no moving parts, so nothing to break done, so only a poorly informed idoit would say 'it's a waste of money in this country'!!

So how much would your average installation into an unvented (with solar coil pre-plumbed already) be?

Sorry, but I would not share that type of information on a DIY open forum.
We are a Bona Fide Plumbing & Heating Engineers, plus, we would not cover your area.

 

[mysteryman]

If you wish to add an extra solar cylinder it needs to be a preheat to the main, existing, cylinder. You should double the DHW storage when you go solar anyway. If you can, fit the preheat below the existing cyl, so that heat can thermo-syphon into the main cyl. If you can't fit it below, the solar controls can be organised so as to pump heat between them as required. This will need an extra sensor or two. You should be aware of the risks of legionella. It is not really worthwhile linking in to the central heating in the UK climate - you don't need CH in summer, and solar gain drops by a factor of 20 in the winter compared with summer.