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seumasm.bsky.social @seumasm.bsky.social · 10/02/2025

Renault #HydrogenSoufflé commercial vehicle edition. Incredibly predictable, at least some realism seems to be being expressed at CEO level from a major auto manufacturer now, shame the funds weren't invested in their EV platforms. www.hydrogeninsight.com/transport/th... @mliebreich.bsky.social

hydrogeninsight.com

'There is currently no market for hydrogen vehicles', admits Renault CEO after joint-venture collapse

The French auto firm’s Hyvia joint venture with Plug Power has been in receivership since December

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seumasm.bsky.social @seumasm.bsky.social · 08/02/2025

Shifted tariff to Octopus Go (8.5p/kWh 0000-0530, 26.87p/kWh otherwise). Heatpump running mostly on cheap rate&solar, reduced total grid demand ~21kWh, daily costs ~£5. ~4p/kWh heat, cheap running costs. Combination of PV/battery/tariff/heatpump is impressive. Average ~3.63kWh solar/day (22 days).

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seumasm.bsky.social @seumasm.bsky.social · 04/02/2025

I'm impressed with the Tesla Powerwall's algorithm. It is a little frustrating to have such little automated control of it in the Tesla App but using the Netzero app (www.netzero.energy) you can tell it to switch between Self-Powered and Time-Based Control (uses time of use tariff data given to it).

netzero.energy

Netzero

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seumasm.bsky.social @seumasm.bsky.social · 04/02/2025

@duncanlamont2.bsky.social I think you have an impersonator duncan-lamont .bsky.social (without the space), he follows your followers and reaches out in DMs (presumably to scam) reported account.

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seumasm.bsky.social @seumasm.bsky.social · 26/01/2025

Solar production over 9 and a bit days is 26.15 kWh, averaging > than 2.6 kWh for 3.87 kWp system in mid to late January at 58.47N, production more than covers heat pump demand in Octopus Cosy peak period (via Powerwall) & approximately almost 10% of overall household demand during the same period.

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seumasm.bsky.social @seumasm.bsky.social · 23/01/2025

Neat feature of the Tesla Powerwall 2 is Storm Watch grid charging, even without the DNO approval in place it grid charges (not normally possible) when Storm Watch is active. Period is 0600-2359 tomorrow. DGAF about peak rate, £2 for ~5 hours potential off grid heating feels worth it.

Storm Watch charging Tesla Powerwall 2 Tesla App view

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seumasm.bsky.social @seumasm.bsky.social · 20/01/2025

Heat pump installed 40 days ago, running well during briefly sub zero weather. Powerwall 2 installed last week along with solar (~3.6 kWhp). Solar generation covering all Cosy peak tariff (4pm-7pm) heat pump use in January (@58.47° North) since operational, admittedly mostly mild temperatures so far

Mitsubishi Ecodan 8.5 kW R32 and Tesla Powerwall 2

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seumasm.bsky.social @seumasm.bsky.social · 21/12/2024

8.5 kW R32 Ecodan installed 12/12/2024. Replacing resistive heat, mainly mild outside temps. Average flow temperature ~35C. Ecodan reported COP 2.63 (163kWh in, 429kWh out). Massive improvement in thermal comfort, house demand costs probably closer to 40% with Cosy, ~£7.3/day last 5 days.

Octopus Energy energy use indicating 48% decrease in house demand over 5 days 16th Dec - 20th Dec (305.1kWh>158kWh)

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seumasm.bsky.social @seumasm.bsky.social · 24/11/2024

My mother's home hit a daily electrical demand of 101 kWh in 24 hours (90% heating?). Met station temp avg ~1 C, 15 mph NW wind. Poorly insulated timber frame house (~142 sqm) with electric heaters. A previous surveyor recommended a 11.2 kW heat pump, curious if 8.5 kW would be enough?

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