@XVGN It's not that PW3 isn't in the frame - it's obviously more advanced - it's just the additional cost which I think is about an extra £2k - not sure yet as I haven't got any full quotes yet - my annual usage is only 1800kWhrs so a low usage makes it hard enough to break even and I'm already pushing the price in the wrong direction with the monocrystalline panels. Part of the problem for me is that I have no south facing roof, no one is interested in mounting anything on my flat roof extension but I have a huge, but shallow angled west facing roof - it's not ideal.
Re:Tesla/USA - I am a Starlink user - and I'm concerned about anything Musk is involved with ATM - Starlink is fantastic in those situations where there's no mobile signal - which is more common that you might imagine - I use it on my campervan and in the past 2 months I've been away for over 5 weeks - Norfolk, Cambridge, Cotswold's, Lancashire - it ticks me off that they increased the price after years of suggesting prices would come down as uptake increased. How will Tesla do long term? I don't know. He's a rich guy but he's lost a lot of money - Q1 profits down 71%, share price down 40% since Dec 24, brand/reputation damage. Trump's tariffs are affecting Tesla's own supply chains.
I worked in several areas of the electrical power industry (generation, protection, distribution, metering) for many years - writing software for power stations, electricity meters, etc - and worked for 2 US companies - I'm not sure at all how working with US supplied kit is going to work out - frankly China seems like a more reliable long term business partner ATM (I worked on systems for the 3 Gorges Project and on power projects in India and South Korea). Experience teaches me to be wary of over specifying a system - e.g. buying flexibility or capacity that I really may not need.
The PW3 provides more storage capacity than I actually need - according to my calculations - but other factors, costs, benefits/break even may decide otherwise - my investments in the stock market are 8-18% down since Feb so going to sit tight on that for who knows how long - but I've got money sat in the bank - just numbers on a page - doing next to nothing - 3-4% - and interest rates are possibly heading downwards so I was just looking at putting the money to some use seeing as we might have decided not to move again in the foreseeable future.
I've looked at solar several times in the past and written it off as hard to justify - solar panel and battery prices - although lower - and unit prices for electricity although higher - still don't make it easy to justify imho - especially if you might want to put your money into other projects.