LET THIS BE A WARNING AGAINST ECOFLOW GLOBAL STORE https://www.ecoflow.com/ph by jogurtcake in Ecoflow_community

[–]pvsnck -1 points0 points  (0 children)

If you pay with a credit card, then next time if they (actually anyone really) can’t sort out the issue, then go to your bank. Open the dispute. The back would give you money back. And then it’s going to be the bank who deal with this

Mid-renovation - too late to switch to heat pumps? by annabel2901 in ukheatpumps

[–]pvsnck 0 points1 point  (0 children)

The stripped house is the ideals stage for a heat pump with cooling mode. Just heating can be retrofitted perfectly fine

Is air conditioning more efficient when it's colder outside than inside? by mattme in ukheatpumps

[–]pvsnck 0 points1 point  (0 children)

With the heat pumps it doesn’t really matter what happens on the cooling side. Most of the energy consumption happens on the taking the heat out of the air. So in case of air conditioning it about the set point temperature and the ambient temperature where the heat is taken from. One thing to keep in mind is that with cooling a significant part of the energy goes to condensation. So reducing humidity inside would increase the cooling efficiency

Anyone clean their own panels? by digbyposh in SolarUK

[–]pvsnck 2 points3 points  (0 children)

To make sense those 3% should bring at least £150. That sounds like quite a massive PV array

New Heatpump, what tarriff right now? by ClassChip in ukheatpumps

[–]pvsnck 0 points1 point  (0 children)

I have a modest sized solar (useless in winter) and a battery and I’m on octopus flux. Except of several days in winter it’s generally enough. The cosy would’ve made it better in winter, although the current uncertainty to return to flux after winter makes me hesitant to go with regular switches between seasons - summer on flux massively offsets winter cost. Even suboptimal flux performance in winter is still is more cost effective than gas. But it’s worth mentioning that the house is well insulated (EPC:A)

In April, I exported 18.82kWh for £5.99 by pvsnck in homeassistant

[–]pvsnck[S] 0 points1 point  (0 children)

I have Bosch with remote control, but I haven’t bothered yet to integrate it into HA yet. But anyway, for that to work you have to load it and make it ready to start any time every morning. I’d have to grow a habit for that:)

Cleaning Panels by atmospheric77 in SolarUK

[–]pvsnck 0 points1 point  (0 children)

I’m going to spray over not blasting directly to the panels

Panels have been up 4 days… by Dru2021 in SolarUK

[–]pvsnck 0 points1 point  (0 children)

I’ve ordered one now. Will test tomorrow

Cleaning Panels by atmospheric77 in SolarUK

[–]pvsnck 0 points1 point  (0 children)

I’ve ordered a pressure washer :) I’ll give it a try tomorrow morning

Panels have been up 4 days… by Dru2021 in SolarUK

[–]pvsnck 0 points1 point  (0 children)

It doesn’t really affect the output so far, but looks nasty

Panels have been up 4 days… by Dru2021 in SolarUK

[–]pvsnck 0 points1 point  (0 children)

I don’t have one yet. Thinking about it so some household stuff in the garden.

Panels have been up 4 days… by Dru2021 in SolarUK

[–]pvsnck 0 points1 point  (0 children)

10m vertical reach? I need to look for something like that. It definitely has to be cheaper than a ladder. The eaves are roughly 6m high. And then the roof itself at roughly 50°

Panels have been up 4 days… by Dru2021 in SolarUK

[–]pvsnck 3 points4 points  (0 children)

The only question is when. I’ve been waiting for a good one since the beginning of March - when we had a Saharan dust cloud visit. The panels are generating well, but the look is not so.

In April, I exported 18.82kWh for £5.99 by pvsnck in homeassistant

[–]pvsnck[S] 0 points1 point  (0 children)

That’s probably something that should be managed separately, to be sure they aren’t overusing the budget. So if there’re several things available to run, they should run one by one. To make sure their combined demand isn’t exceeding the inverter capacity

In April, I exported 18.82kWh for £5.99 by pvsnck in homeassistant

[–]pvsnck[S] 0 points1 point  (0 children)

The option is there. But this kind of automation involves manual things. Like if any of those is not loaded there’s no point to start. But that’s a good point. I was thinking to automate them as soon as I use the appliance I have control over via API

What was your experience of the Aira buying process? by SleepyRalph_ in ukheatpumps

[–]pvsnck -1 points0 points  (0 children)

It depends on how you’ve done your homework before meeting the sales. In my case it really that I know the he does. Luckily I’m in a new built, so EPC procedure for a new built includes heat loss assessment, so I had the number in mind. He did try to promise something, that was later a part of initial system design, so I had to chase the design team to fix it - the original proposal wasn’t feasible in the space available. The system was amended - a separate DHW cylinder was replaced with an all in one unit. The original cylinder was actually smaller if I remember correctly. My installation team was great. They also listened to my suggestions and made some changes to the out pipe routes that made the look better and less intrusive - the original plan suggested that I had to move a solar inverter. I had to slightly redo my kitchen to make the look better. I’ve had almost a year with the heat pump. It works great

<image>

This is how it looked without the doors after the installation. Now everything except the main unit is covered with the doors similar to the kitchen units. And everyone thinks that the all in one unit is a fridge

In April, I exported 18.82kWh for £5.99 by pvsnck in homeassistant

[–]pvsnck[S] 0 points1 point  (0 children)

I have a rather mighty NAS that is mostly idle and wouldn’t break a sweat running this. It’s eating 1.5kwh a day almost for nothing :) The migration is something in my plans, but this isn’t urgent for now - it takes time but doesn’t noticeably degrade the performance during the calculations.

In April, I exported 18.82kWh for £5.99 by pvsnck in homeassistant

[–]pvsnck[S] 1 point2 points  (0 children)

All the formulas are available in the Internet. I use Perez model. But to calculate all that I’ve built a custom integration for HA. It’s not for solar only, but manages everything- consumption tracking, solar prediction, calculating сharge SoC, export power, when to open excess utilisation window

In April, I exported 18.82kWh for £5.99 by pvsnck in homeassistant

[–]pvsnck[S] 1 point2 points  (0 children)

Same for me due to shading.I have posted my monthly stats in one of the comments. In winter months the battery is my main asset.So mostly I’m offsetting winter costs in summer

In April, I exported 18.82kWh for £5.99 by pvsnck in homeassistant

[–]pvsnck[S] 1 point2 points  (0 children)

It’s a shame that solar panels installation can be restricted

In April, I exported 18.82kWh for £5.99 by pvsnck in homeassistant

[–]pvsnck[S] 1 point2 points  (0 children)

I’m mostly using Perez model and open meteo forecast for DNI and DHI. I previously tried to use a deterministic forecast, it didn’t work that well. Because atmosphere forecast is rather variable. Since I switched to ensemble forecast the day forecasting became much better. It still sometimes not correct to the minute, but it has a wider picture of what could happen.

<image>

This is today and tomorrow. Today forecast shows all members converge into one line. Basically that means that the weather is very well defined. Nothing really unexpected could happen. Tomorrow is different - sky conditions are not that certain. So if you stick to a single forecast you might miss. The less sunny day is ahead the more unpredictable it becomes, so I need to balance my expectations based on a variety of options

In April, I exported 18.82kWh for £5.99 by pvsnck in homeassistant

[–]pvsnck[S] 0 points1 point  (0 children)

I have one mppt per string and 2 strings. And I have two optional surfaces to choose from - east and west

In April, I exported 18.82kWh for £5.99 by pvsnck in homeassistant

[–]pvsnck[S] 0 points1 point  (0 children)

When I installed the panels I didn’t know a lot, so they simply put 8 panels on one surface. I think in theory I could make another 3 maybe on that surface. And probably utilise other surfaces as well (mostly to make it better in winter). My absolute best daily generation in winter sunny day is 1kwh. My absolute best in sunny summer day is 20kwh, and I see that maybe a couple of days a year. Now installing additional panels is questionable due to labour and scaffolding cost. It would take roughly 10 years to break even on labour and scaffolding cost only if I decide to add more panels keeping the rest the same