I live in Ireland. I'm a bit of a handyman and can turn my hand to various things including a bit of plumbing. But we have a complicated system involving a boiler and PV panels as heat sources, a 500 litre thermal store (buffer tank?), underfloor heating and a complex controller. All very good equipment installed by a local guy who is German. Problem is he now often works away and finding somebody who can help can be difficult. This forum looks great. So thanks in advance for any help.