Dillsue

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.

That's not how it works. The right to connect generation up to 3.68kw is defined in the national terms of connection which is what legally governs everyone's connection. There's likely some exceptional situations where a DNO can object but generally everyone can connect up to 3.68kw. I put self installed on my G99 and my son in law put self installed on his G98 both accepted by our DNO Some sort of notification should exist so DNOs can manage the network. That could be a part prefilled G98 included with plug in solar so the buyer only has to fill in their address and post it. Not onerous stall to do that

Similar to importing hazardous kit from un regulated sources.....the majority can probably evaluate the risks and manage accordingly, those that dont have a higher risk of "self extinction"

There's already some exemptions within G98 for less than 800watt generators but the bulk of requirements are likely to still apply?? Most of the requirements are to ensure safety and grid stability so you wouldn't want to loose those. Definitely need to retain the notification process or you could end up with a massive install base on say a block of flats pushing the local voltage through the roof on a sunny day If you want to above 3.68kw then G99, but if you're adding to existing but staying under the 3.86kw limit for multiple G98 certified systems then I guess you submit a new G98 notification and list all the devices with a total certified limit of 3.68kw??