Hi
I am running 6 x Victon Multipluss 48V/5000 with pylontech batteries and was on generator and solar panels. We have now switch over to mains electric so connected to Grid, just asking for best way to set this up, we will eventually go onto EV tariff so needs some help with setting up times for kicking in the mains grid to charge the batteries, currently we on fixed tariff and just need the Grid power to click in when batteries are low and charge to a certain percentage, is this possible? Do i need to set the Grid Code to UK, i think i need a password for that? Just asking for some help on settings if anyone has advice. Thank You
As you seem to be in the UK you will need to apply for a G99 (simple process) and see what the DNO will let you connect. If its a new supply and I assume 3 phase then likely should not be an issue with the inverter size, but, its possible they may limit your export so a G100-2 will be needed.
ESS or DESS is what you need, easy to set times to charge etc.
Simon…
HI Simon thanks for your reply, i am not feeding back to grid, i am simply using the grid to charge my batteries if the solar power is not enough, what is difference with ESS or DESS?
If you run grid parallel using ESS you DO require DNO approval. Why, because you are feeding energy into the grid supply, not to be confused with feeding in excess back to the grid. In order to this the system has to sync with the grid. Setting up scheduled charging is only possible with ESS. If you use it with AC ignore however, you can keep the grid diconnected and only connect e.g. on low battery state to charge from the grid and disconnect as in a camper setup or similar to kicking a generator in when off-grid.
@ejrossouw has answered with what I would have said, only thing I will add is you can use the generator stop/start to add timers to the AC ignore.
Simon…
Just for info…
You do NOT ALWAYS need G99 approval, but usually YOU DO.
It will all depend on your individual system and size.
It’s not that complicated or hard to get G99 approval.
To be clear, whether you intend to feedback or not is immaterial. The G99 relates to the parallel connection of your equipment to National Grid equipment.
For those that are interested in the detail and are in the UK this is the ‘horses mouth’ detail from the National Grid website:
https://connections.nationalgrid.co.uk/g99-connection-procedures/
Your local DNO deals with the process, e.g Western Power Distribution etc
@NeptuneUK It actually refers to a different process to follow depending on various citeria. If you connect ANY power generator equipment (batteries, inverter etc.) in parallel to the grid you have to either submit a G98 “notification” within 30-days after installation, which he can do if he applies the UK G98 grid code, which will turn his system into a 3.68kW (16A) power plant. Given his system is certified 4.4kW, he has to go the G99 application route, but if it meets certain criteria he can follow a “fast track” process. The DNO may elect to allow the system as is or ask to limit export (selling) to 3.68kW. Applications can now be done via the new portal https://connect-direct.energynetworks.org/, but depending on his DNO, they may still accept manual applications using a form, which he should best obtain from them as there may be slight variances, also not forgetting there is also a commisioning document to submit following installation.
The system in question is not 4.4kW, it is 6 x Multiplus 5000.
Citation or references
https://connections.nationalgrid.co.uk/g98-connection-procedures/
I stated:
I seem unable to find the OP’s assertion of this fact in this post, could you link to it
@pwfarnell Thank you, yes. The answer remains the same in that he requires DNO approval if he plans to set it up as grid parallel ESS and use the scheduling or he could simply opt for generator start stop option / AC Ignore setup.
@NeptuneUK To clarify, his post states “6 x Victon Multiplus 48V/5000” as @pwfarnell kindly pointed out. Each 4.4kW as per the G99 certification. I could have been clearer and did not even go as far as looking at the correct process for the size of what I assume is a 3-phase system as one unit already requires a G99 application.
Never assume what someone is doing with 6 x MP, you could always ask the OP to clarify.
I agree it is a reasonable assumption, but an assumption none-the-less.
This is the sort of thing of heard over the years:
You have 3 MP’s…
Yep, 1 installed, 1 US, 1 spare…
I have assumed, and made mistakes off the back of it, so as they say, the devil is in the detail.
I never said his didn’t require G99, nor did I say he did. I started my response with:
This was a response to another contributor, to add context for those who find this post based on a search involving ‘G99’.
@NeptuneUK If only we had all the time in the world to do all that ;), but don’t disagree. Ultimately the OP has to approach his DNO armed with, hopefully useful insights from various inputs here, as the DNO will have to decide on the “charging only” and G99 aspect as no matter how you look at it, it is a PGM, which is regiulated when it comes to connecting it to the grid. Only then can a solution presented other than it being possibilities at this point in time.
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