A question about Gateway 2 Site Import Limits - what should this be (have been) set to by the installer? (UK based, so US answers probably don't apply)
We've just had 2 PWs installed at our home a couple of days ago. We're on a 100A DNO fuse, but have quite a few high-demand units, a couple of Model S's (sharing a 50A connection), a few heat pumps, induction heater etc etc.
Even though we've got 8kW solar, with Octopus Intelligent we're currently paying less to import electricity overnight than we get from Scottish Electric via SEG for export during the day, so I've got charge from grid enabled (which we will definitely utilise in the winter anyway to heat the house during).
First night of charging the PWs yesterday, and checking this morning I can see that even though there was a 6 hour window for them to charge up, they went full pelt at 5kW each for an hour - and during that time we hit a max demand of 24kW (~109A at the 220V we were then receiving). Thankfully the DNO fuse and none of the consumer fuses blew, but I thought that during installation the Gateway should have been set such that it would not draw more Amps than the supply is suited for via "Site Import Limits"?
I've given the installers a call, but their technician is currently off sick so nothing they will look at until next week.
I'll be able to manage this in the meantime by bringing down the charge rate on the EVs, and managing other loads, but just wondering if this was an oversight by the installers? Also, as they've had a quite a few minor snags/issues along the solar/PW installation road, I've lost a bit of trust in them, so I was wondering if anyone knows what import limit they should be putting on the Gateway when they do log in next week? I don't want them to hamstring us with too low a limit, or go too high forgetting about voltage drop.
Thanks for any guidance!
We've just had 2 PWs installed at our home a couple of days ago. We're on a 100A DNO fuse, but have quite a few high-demand units, a couple of Model S's (sharing a 50A connection), a few heat pumps, induction heater etc etc.
Even though we've got 8kW solar, with Octopus Intelligent we're currently paying less to import electricity overnight than we get from Scottish Electric via SEG for export during the day, so I've got charge from grid enabled (which we will definitely utilise in the winter anyway to heat the house during).
First night of charging the PWs yesterday, and checking this morning I can see that even though there was a 6 hour window for them to charge up, they went full pelt at 5kW each for an hour - and during that time we hit a max demand of 24kW (~109A at the 220V we were then receiving). Thankfully the DNO fuse and none of the consumer fuses blew, but I thought that during installation the Gateway should have been set such that it would not draw more Amps than the supply is suited for via "Site Import Limits"?
I've given the installers a call, but their technician is currently off sick so nothing they will look at until next week.
I'll be able to manage this in the meantime by bringing down the charge rate on the EVs, and managing other loads, but just wondering if this was an oversight by the installers? Also, as they've had a quite a few minor snags/issues along the solar/PW installation road, I've lost a bit of trust in them, so I was wondering if anyone knows what import limit they should be putting on the Gateway when they do log in next week? I don't want them to hamstring us with too low a limit, or go too high forgetting about voltage drop.
Thanks for any guidance!