Dillsue

Our solaredge inverters run way beyond that at default settings:) Grid can be up to 253v so you'd need to legitimately run higher than that to export anything.

If you're paralleling the inverters and they are grid tied to the house AC, then you can connect multiple inverters, subject to the usual DNO restrictions. Unless there's some quirk of the inverter, they just autonomously pump power into your house/grid. We've got 2 PV inverters and soon to have a battery inverter all running in parallel with no control between them. Just watch out for voltage rise in the house if you're producing alot of power. The DNOs obligation is to limit the voltage at your service fuse to 253v. If you're trying to push alot of power into the grid through undersized cabling within the house, then you might find the house voltage rising significantly!!!

Solis confirmed you need a DC input from either or both the PV or the batteries....will have to get the batteries charged and assembled!

If you look on the ENA Connect Direct type test register there's a few grid compliant V2x chargers listed. Octopus and Indra have a few and one or 2 others but not many.....nothing from Sigenergy. If your car has V2L with 240vac outlets for camping/power tools, I beleive you can wire these to the generator inputs of Victron inverters fitted with genny inputs. Could get you up to 3kw out of the car??

Thanks for that. It adds more confusion as within the setup options you can configure the inverter to run without a battery!!! Did you have any PV input when the battery failed? I'm wondering if it needs a DC input from either PV or battery to power up??

Anyone know if a solis S5 EH1P 5K-L hybrid inverter needs to have active PV connected to start up? I want to test the comms to its export meter and don't have any PV or battery connected but the unit is dead with just the grid AC connected and the on/off switch in the On position. Anyone know if these units will power up with only the grid AC connected??

You'd need to ask the manufacturer

I think the building control specs I posted earlier are based on 25kg/m2. 10-11kg/m2 sounds quite light ??

Building control tables for C16 floor joists suggest 5x2" at 400mm centres will span 2.5m and 6x2" at 600mm centres will do similar. The 4x2" you've already got will likely carry several tons at the ends where they bear on the walls so bolting slightly deeper joists to the existing would likely be fine to prevent sag without bearing the new joists on the wall. If it were mine and the underside of the existing joists were pretty flat I'd glue and screw 2x1" to the underside of the existing joists to make a basic laminated joists. Another option would be to screw long strips of ply to the side of the existing joists.

So that would make it a G98 compliant unit

G98 has more onerous/specific requirents than those in the harmonised standards associated with the various EU/UK directives. As an example you can get a CE/UKAS marked inverter that meets all the requirements to legitimately be sold in the EU/UK but you can't connect that to the grid without complying with the countries grid connection standards, G98/G99 for the UK

For some maybe. Out of the box our solaredge ones are higher!!!!

If your ditching G98 for sub 800watt systems how are all the safety requirements going to be specified??

Yep that's as it is....as previous page!! It will "self regulate" but those at the extremities of the flats will never get started on sunny days as the voltage will be too high. Without a stream of notifications every block of flats could have problems for years before the DNO recognises the problem and schedules in any alterations needed

Firstly, it can't be exempted as G98 covers a load of safety requirements. If they do away with G98 they'll have to write a new spec for plug in solar and that isn't gonna get done in a few months. G98 already covers sub 800watt generators and gives a few exemptions for those. Recognising plug in systems may be an additional exemption but still part of G98 Secondly, they can't dispense with notification because.....if all your neighbours installed 3.68kw solar but didn't tell the DNO then first sunny day the local voltage would rocket and push the voltage past the max limit and your inverter(when installed!) could trip. You wouldn't be happy. Imagine 50% of a block of flats installing plug in systems that the DNO didn't know about it so could bolster the local grid and/or drop the supply voltage, it would be bedlam.