Dillsue

With batteries storing energy in a way that produces DC voltage, it's not possible to connect batteries directly to the AC grid. The energy from the battery has to go through an inverter to convert from DC to AC. It maybe that theres an inverter built into the battery pack or it maybe theres a discrete separate inverter, but there will be an inverter between batteries and the grid

So long as youve got an approved export limitation set up.......16amp for G98 OR whatever your DNO gives consent for under G99.

But only 50% of the population understand that principle

SPEN told us informally within a few days we were ok to double export from 16A to 32A. Formal G99 application was £300. Be concious that once youve got approval its unlikely to be withdrawn so youve got the "right" to export for ever. I'm sure it's been said in the past that some DNOs havent charged for a G99 application??

If discharge to the house from your 6.3kwh battery is limited by your 3kw inverter then doubling the battery capacity wont make any difference to the discharge rate of 3kw, if the second battery is connected up in the same way as the first. What's the objection to a G99 application for a bigger inverter?

You can have as much PV installed as you want. The DNO is only interested in what can potentially discharge to the grid which is limited by the inverter.

If its the one Ive just looked at its described as used and I'm fairly sure ebay expects a used item to be fully working unless any defects are stated. Andover is a long way from Preston so that would be a concern for me if I wasnt happy and wanted to return it.

If its an eBay auction, ebay will reimburse you if its not as described. The key is how is it being described?

To get export payments, I beleive you need the MCS installation cert and the installer to register the install on the MCS database. I beleive some or all SEG payers want a letter from the DNO confirming the grid connection is accepted. On top of those you want elec test cert, warranty details, operation guide. Details of any non standard settings theyve made together within any usernames and passwords. A list of component model/part numbers would be useful in the future for getting spares sorted.

Unless you specifically asked them to sort out a SEG contract for you, and I dont think thats the norm, it would be you that would sort out an export payment contract, as you are doing now with Octopus. If you'd asked for the MCS certificate when the system was installed, but they didn't supply it, then you might have an argument that the loss of export payment was their fault. If they're an MCS acreddited installer then you'd likely be able to make a complaint to MCS but not sure you'd get your lost export payments reimbursed???

What's the model number of the Emlite unit with flashing lights(probably a meter) and how many wires are connected to it? Whats the model number of the solar inverter? Might be able to guess a bit more accurately how your system is set up, but if its a single phase inverter with the 3 phase supply configured as you remember, you might not be using any of the solar generation!

Yep, winter generation is nothing like summer but a 46 panel array could be quite sizeable in kwp

I've no experience with in roof trays but would have thought it feasible to buy the trays and get your roofer to fit and flash them. Sort out the solar installer in your own time

Maybe from a current perspective, but voltage rise could be an issue for the garage inverter. From a previous post the OP already has a 6.3kw PV system on the house pushing the voltage up. The new 5kw inverter is at the end of a circa 30m cable so theres going to be a bit of a rise on top of a house voltage that may already be elevated on a sunny day. OPs spark probably needs to be looking at the install detail and design

Cant say how your inverters/batteries would interact, but Id be fairly sure you'd need to beef up your 2.5mm cable to 6 or 10mm if you want to be able to push 5kw into the house.

Without knowing the specifics of the spill youre referring to, theres a fair chance the St Agnes resident was partly right in that the surface water from the new housing is helping to inundate the the local sewers when rains heavily. What theyre likely missing is that their surface water is doing the same and would likely cause the same problem without any new housing or holidaymakers. Everyone turning the shoe on the bottom of their downspouts 90 degrees could likely keep an awful lot of s**t where it belongs.

Its a G98 notification that you should be using as G83 was superseded a few years ago!! The drawing they likely want is a single line diagram showing how the principle components in your house are connected. If you get an A4 sheet of gridded paper its easy enough to draw showing each component as a box with a description in the box or next to it. Show the cabling between each box as a single line. One of the principle things they want to know is the location of the PV isolators so add a note next to the isolator boxes stating where the isolators are. Google "PV single line diagram" for some examples, but keep it simple!

Google "Orbital marine". Up and running in the Orkneys. I think this is something of a test bed with the intent to install more.

Sorry to seem a big negative but if your builders solar installer is offering 268w panels, then you probably want to use a different installer, or fully understand why such a seemingly dated spec of panels is being offered.

I think the "could not manage" should be replaced with "cant be bothered". Unless youve got home generation, batteries or on a TOU tariff, for most people would see no reason to load shift.

But the need to have gas generation isnt going to go away. It will just be paid to be on standby for longer periods to cover for times the wind isnt blowing. Last BEIS forecasts I looked at showed circa 20% gas generation in 2040 and 14% in 2050. Hopefully all with working CCS by then

There could well be. Canadian solar do 450w panels at 2100mm tall so fair chance theres 2000mm panels out there at 400-450w

If youre relying on the advice of others I think you need to be cautious with gas boiler lifetime as its not uncommon for plumbers to advise on replacement prematurely. A friend had his boiler condemed with a replacement quote for £2500. With the cover off in 2 mins it was quite obvious the fan impeller had failed. It was £80 for a replacement OEM fan delivered the next day and 15 mins to fit. Not sure if this was revenue generating or lack of ability, but its not good. My wifes uncle had a similar instance with a leaking condensate drain.

Dont underestimate the potential complexity of ST. Youll almost certainly have an electronic solar controller that needs configuring in the same way as a PV controller/inverter does. Therell likely be at least 2 temperature sensors needing wiring back to the controller and wiring for a pump. If youve got a sealed system youll likely have a pressure releif valve, expansion vessel, auto air vent valve, non return valve, mains top up valve. Installation is more involved running insulated(special hi temp insulation) pipes from the roof through the house versus PV cable. Insulated roof penetrations are more involved than those for a couple of PV cables . You need to find space within the heated envelope for all the bits mentioned above whereas a PV inverter can go more or less anywhere. If youre strapped for roof space then evac tube ST may give more kwh than PV for the same area, but if youve got the space then PV is a more flexible option

Unless youre in a conservation area or listed building, Im fairly sure pitched roof mounted panels are permitted development