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The ebay listing states "Our Solar Panels have a high energy conversion of 15% + and a 18 V operating voltage, which makes it ideal to charge 24V batteries." I would be very sceptical. I am not aware of any commercially available monocrystalline pv that will generate at efficiencies of...

Hello, I would suggest you try posting this query on the Navitron forum (www.navitron.org.uk/forum). You will find that it is one of the best repositories for information on all the renewable technologies, including photovoltaics. I agree with previously posted comments about battery...

Thanks, The level in the larger header tank is above that of the F&E tank. We do have iron water pipes at the entry point up to the stop cock, but after draining the tank and cylinder the header tank was clear without sludge in the bottom. The CH system has been flushed through and has had...

Hello, I have just had a new gas boiler installed (Vaillant ecoTec plus 428). This has been connected up to the old s-plan system and HW cylinder. However the hot water is now coming out with a nasty yellowish/brownish stain. I have drained the header tank and cylinder completely and...

Thanks Dave, that's very clear. Much obliged

Thanks Simon, I'd appreciate it if someone could elaborate on your 'pump overrun' comment, as I think I'll need to understand it a bit more before I have this conversation with my installer. regrds Justin

Hello, Installing a wood or multi fuel stove with back boiler should be a very practical option. However the main issue you will come across will be the drop in efficiency of combustion that occurs as the CH takes heat away from the stove. Some stoves are better than others at coping with...

Hello, Existing central heating/DHW system is an vented S-plan supplied by a clapped out gas boiler which is to be replaced. I am considering having it replaced with a Vaillant ecoTec plus 428 open vent boiler. I would like the existing programmer and S-plan wiring to be reused for the...