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Waiting to hear which companies are interested to buy Ripple out of administration. I think Ripple had the right concept, just Sarah and crew were a bit out of their depth and the concept needs scaling up. I hope the coops can be kept under one management and move forward together with a better reso...

We got to 1 air change/hour and left it at that. Passiv haus standard of 0.6 is not expected for refurbs/retrofits. For MVHR consider small in-the-wall room units - Fresh-r, DUCO, Renson make these in Netherlands. Well-suited to refrbishment projects - require no ducting - come with humidity/Co2 sen...

Air tightness is hard to achieve, especially with a revovation project (passive haus accept a lower standard for refurbs). Mine is a 1950s bungalow with brick cavity walls. For air tightness we replastered one coat externally, before 200mm insulation and acrylic render and connected the extenal wall...

Consider small in-the-wall room units - Fresh-r, DUCO, Renson make these in Netherlands. Well-suited to refrbishment projects - require no ducting - come with humidity/Co2 sensors. Try to attend a trade exhibition in Netherlands (they lead with small MVHR) eg. VSK Utrecht. Consider accessibility for...

Sounds like a project! Make the plan how to get the whole building to net zero (a passiv haus envelope) before you start any work. Consult with others on the draft plabn or hire a consultant before finalising the plan. Implement in one or more stages - dont be tempted to start with half-measures. En...

Again Joeboy!

4kw PV installed UK approx cost £5k for approx 3.4kw annual production (sample installation, most common in UK)
Ripple investment to get 3.4kw annual production would be approx £4k (Ripple investment to achieve the same amount)

Looking good for Ripple, I would say

Ah well, you know where you're heading! Cheers. :D Although, knowing how far cash can be stretched in the secondhand market I'd be pricing out as diy at about £450 per 1kW PV install and I'd groundmount it then use the money saved once live to roll over into further RE projects. Ripple being one ca...

Hello Joeboy, I'm focused on quantity of renewable generation towards nett zero, not current ROI. PV will generate over 25 years (beyond my life, but I have children) and many changes/tech improvements/Gov.interventions can be expected over that period which can upset current ROI calculations - just...

4kw PV installed UK approx cost £5k for approx 3.4kw annual production
Ripple investment to get 3.4kw annual production would be approx £4k
Is that a reasonable comparison? - can you please correct my figures?
Just trying to see the wood for the trees.

It appears to me that more PV and an export contract via mcs certification on at least part of the array removes most obstacles and stacks the account with cash for when there is no solar. Although and to be transparent, I'm not as much of a fan of Ripple as i once was. Too many potential fault pat...