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Maybe this? https://www.farnell.com/datasheets/4377942.pdf With capacitors built in. Needs a din rail box to put it in and some start stop switches.

It's a long shot but just possible one or both capacitors are faulty. Capacitors especially electrolytic are normally the first to suspect as they look of a certain age. Could be just enough to start but not quite enough to run? Alternative if the fault cannot be found, of course is replace with...

Unpolarised electolytics are just made up from back to back polarised electrolytics in one can, one of them is always reversed biased so no additional current flows over the normal capacitative current. You can use two ordinary polarised electrolytics and back to back them. One acts as a sort of...

Happened to me too. Not surprising as gas obviously does not run on electricity, Thus its a system designed to fail as soon as the internal battery dies. Assuming there are for arguments sake 10 million installations and the average battery life is say 5 years that means an average failure rate...

Yes, what Binky and UNG said. 100% go hybrid., plus you can add batteries in stages as funds allow, even a small battery is hugely beneficial as the Sun is not very consistent frequently hiding behind clouds! a small battery will cover those events, a bigger one could cover overnight too.

I assume you have a string of batteries and they are not all at the same charge level, maybe you added a new one to an existing set and they where not charged to the same level. The documentation I think says how to add a new battery to an existing set, viz charge/ discharge the existing set to...

Yes, hybrid inverters are like retrofit AC battery inverters but with added PV inputs. I have used them with direct PV and AC inverters. Also you can add them to existing AC PV inverters with the possibility to expand by adding DC PV later. Just watch the total inverter loading is not exceeded...

Your previous ones 20 years ago were probably around 15% efficient, current ones although bigger are also nearer 22% efficient, so you will need less panels and less total area for the same output,

Home assistant has integrations for most Solar systems, I use it on our Solax inverters and batteries. Mine does run on a raspberry pi 4 but could run on any virtual server computer if permanently powered. My interface is via modbus, but there may be wireless or ethernet options. Home assistant...

I would try to maximise the PV power from the south facing roof. Maybe use more efficient pv panels (450 watts +?), mix portrait and landscape, use different aspect ratio panels, get as close to the edges as regulations allow. East/west only gives a half or less PV power at best more like one...

The alternative is an indirect hot water system. We have that, although it's a GHSP. Hot water is confined to a closed system heat store. Domestic hot water is then drawn direct from the cold water mains passing through a heat exchanger. It does away with the need for a domestic hot water tank...

I have two identical systems except that on in south facing and one is split EW (2mppts). I can compare the two systems directly and on sunny days the south facing one peaks at around 50% more power in the middle of the day, and the EW one just beats the S first thing and last thing, but the...

100ma TD Works fine on my inverter system on TT. Whereas 30ma RCD's previously were causing problems.

Of course the way to ensure electricity is totally decoupled is to generate it oneself from PV.

So you only have two batteries. First get the total battery voltage of the two from the system status menu. Then isolate the batteries if you have a DC isolator, if not switch off the inverter and or master battery, and disconnect the two leads connecting the two batteries together, and measure...

In my experience these batteries can take a long time to correct any imbalance, think weeks vs days. But once balanced all should be good. It's not too difficult to measure each individual battery voltage with a meter on DC by disconnecting them, I think you need to put the short jumper link...

I have a Solax system and find sometimes anomalous battery states, but they seem to sort themselves out after a while, probably BMS working. Just interested though how did you get into battery balance mode?

You can add a completely separate system (with own inverter) as long as it does not alter the existing FIT system, and of course you must not feed into the FIT meter! Just may need DNO approval

Check in settings that the meter is correctly set, ie CT or Modbus, also that the meter is enabled in settings. Check wiring to CT.

Always wondered why they chose 50/60 Hz go AC transmission. What if you upped the frequency? Marine and aircraft used to use 400Hz enabling smaller transformers. switched mode power supplies are kHz. I think the problem is not in the transformers but the reactive losses in the lines and cables...