Recent content by simonog

I believe the number you are looking for is 10 for the smallest PowerPak. So why wouldn’t one use one of those?

Not sure if these will be a priority for the cars - I’d guess trucks definitely.

@BrettS: thank you - yes, I was actually aware of the intended behaviour in case 2, which is why I installed the frequency meter - so I could test it. case 1 is the normal risk if someone has too much solar and the resistance in the line back to the final transformer is a little high - as it...

I have 4 PWs (the largest UK domestic installation I believe) and about 14 KW solar with 3 inverters (2 * 4KW and 1 * 6KW). i see strange behaviour at two different times: 1. If the grid is connected, the sun is strong and the PWs are full, the solar generates a lot of power to export. This...

Looking at your lines you definitely lost 1-2 seconds at Maggots/Becketts, and I could see another total 2-3 seconds at various places. That would net to a damn good lap time! Not of course that you can measure that on a track day :) From memory there is a Chademo charger on the inner road...

I race there a few times every (normal) year in a historic Morgan. It’s a great circuit. What’s your top speed at the end of the hangar straight? That would tell us something about the aerodynamics of the Model 3. I have never dared take my Model S on the track!

@cwied mentions the local network address from which you can interrogate your gateway direct. Does anyone know why two of us with the backup gateway in the UK are getting a reported voltage of 110-130 V rather than the 230V we saw on the original Gateway (and is the non Us voltage standard)...

Bruce It is a regulatory requirement for any local generation to stay in synchronisation with the grid supply. I believe that is why you will see a tiny amount briefly go into the grid or come back out. Simon

What confuses me about that statement from Tesla is that I have several instances when after some poor days for solar generation, our PW will not charge at night at all and the next day fills completely from a sunny day. Indeed, we have started to use the PW overnight charge as a check on the...

@Jes: that's a clear case for needing manual control or a simple API so someone can create the equivalent of TeslaFi for the PW2. I would say, however, that I only ever see it discharge in the low cost period when it is likely to get enough solar during the day that the remaining battery...

All my empirical evidence is that the PW2s use a machine intelligence system to work out how much to charge from off peak grid power, and some form of weather forecast. Which forecast is a mystery, though after a few weeks sorting itself out (training?) it has been very consistent in...

I have a 4 PW2 configuration which has now been installed and running for almost a year. I am seeing far more satisfactory behaviour than many of you. With 7 hours of off-peak power overnight I use cost saving mode all the time. My only gripe with that is that on my meter the time window is...

Theoretically I agree it’s feasible to take the half hourly charges from the supplier’s API and work out whichnare the half hours to use to have the car charged to the right % by the time one wants to leave. I think it’ll be more complicated if one is prepared to handle any supplier who will...

This may be slightly off the OP’s topic.... TeslaFi is a great system but it’s calculation of power is necessarily an approximation. While it can get the voltage from the API, it samples the current and interpolates. One thing to do is to check after a journey what it records as the wh/m and...

i am a UK Roadster owner, and I have Henry's CAN EU and use it on Ecotricity points. It works perfectly. Depending on the generation of their charger, on the single phase you can draw from 32 to 70 amps with no issue. I thoroughly recommend it. Not cheap but beautifully made and it WORKS! I...