Your First Week with Plug-in Solar: Setup Guide

You have bought a plug-in solar kit, mounted the panels, and connected it to your home. Now what? The first week is when you learn how your system actually performs, set up monitoring, and start shifting your energy habits to maximise savings.

This guide walks you through a practical day-by-day plan for getting the most from your plug-in solar system from the very start.

Day 1: Unbox, Mount, Connect

If you have not yet installed your system, this is day zero. For detailed installation steps, see our full installation guide. The short version:

Unboxing checklist:

• Solar panels (one or two, depending on your kit)
• Micro-inverter
• MC4 cables (pre-attached or separate)
• Mounting brackets and hardware
• UK plug lead (or hardwire connection, depending on installation route)
• User manual and safety information

Mounting:

• Position panels in your chosen location — south-facing is ideal, but south-east or south-west works well
• Secure using the provided brackets. Balcony rail, wall, ground, or flat roof — the method varies by kit
• Angle at 30-40 degrees from horizontal for optimal UK generation (35 degrees is the sweet spot)
• Ensure panels are not shaded between 10am and 3pm

Connection:

• Connect panel MC4 leads to the micro-inverter
• Connect the AC output to your home circuit (via 13A plug or hardwired fused spur)
• Switch on

Most kits take 1-3 hours to install. If the sun is out, you will see generation within seconds of switching on. The micro-inverter takes 30-60 seconds to sync with the grid and begin exporting.

Day 1 task: Take a photo of your smart meter reading (both import and export registers). This is your baseline. Write down the date, time, and readings. You will thank yourself later.

Day 2: Set Up Monitoring

Every decent plug-in solar kit comes with an app. Set it up now — do not put it off.

EcoFlow STREAM:

• Download the EcoFlow app (iOS or Android)
• Create an account and add your device via the QR code on the inverter
• Connect the inverter to your home WiFi
• The app shows real-time generation, daily totals, and historical data

Hoymiles HMS-800:

• Download the S-Miles Installer app
• Create an account and register the DTU (data transfer unit)
• Connect to WiFi
• Panel-level monitoring shows each panel's output individually

APsystems EZ1-M:

• Download the APsystems EMA app
• Register the micro-inverter using its serial number
• Connect via Bluetooth initially, then WiFi for continuous monitoring

What to check on day 2:

• Is the app showing generation? If yes, you are up and running
• Is generation roughly what you expected? A 800W system should produce 2-4 kWh on a sunny summer day
• Are both panels showing similar output? If one is significantly lower, check for shading or a connection issue

If your monitoring app is not working, see our troubleshooting guide.

Also on day 2: Take another smart meter reading. Compare it to yesterday's. On a sunny day, you should see your import figure lower than a typical day before solar.

Day 3-4: Observe Generation Patterns

Now the system is running and monitored, spend two days watching how it performs. Open the app a few times throughout the day and notice the pattern.

What you will typically see:

• 7-8am: Generation begins. Output is low — 50-100W for a south-facing 800W system
• 9-10am: Output climbs as the sun rises higher. 200-400W is typical
• 11am-2pm: Peak generation window. 500-800W on a sunny day, 200-400W on an overcast day
• 3-5pm: Output begins to decline. 200-400W
• 6-7pm: Generation tapers off. 50-100W
• 8pm onwards: System shuts down for the night

This pattern shifts with the seasons. In summer, the generation window is wider (5am-9pm). In winter, it narrows dramatically (8am-4pm). See our monthly performance guide for what to expect month by month.

Compare to PVGIS: The EU's free PVGIS tool estimates annual generation for your exact location. For an 800W system in the south of England, PVGIS predicts roughly 750-850 kWh per year. In Scotland, 600-700 kWh. Enter your postcode in our savings calculator for a personalised estimate.

Common observations on days 3-4:

• "It generated more than I expected on a cloudy day" — modern panels work well in diffuse light. You will still get 20-40% of peak output on an overcast day.
• "One panel is producing less than the other" — check for partial shading. Even a small shadow across one panel can reduce its output significantly.
• "The output keeps fluctuating" — this is normal. Clouds passing overhead cause rapid changes in output. The inverter handles this automatically.

Day 5-7: Start Load-Shifting

This is where the savings start. Load-shifting means running your high-consumption appliances during peak solar generation hours instead of in the evening.

The big three for load-shifting:

1. Washing machine — uses 0.5-1.5 kWh per cycle. Run it between 11am and 2pm
2. Dishwasher — uses 1-1.5 kWh per cycle. Set the timer for midday
3. Tumble dryer — the biggest consumer at 2-4 kWh per cycle. Run it in the sunniest part of the day

How to do it practically:

• Set timers on appliances that have them
• For appliances without timers, use a smart plug (like the Shelly Plus Plug at £18) to schedule on/off times
• Do not try to run everything at once — your system generates a maximum of 800W, and a washing machine alone can draw 500-2000W

The key principle: You only save money on electricity you generate AND consume yourself. Any solar electricity that flows back to the grid (export) is not earning you money under most standard tariffs. Self-consumption is everything.

A household that makes no effort at load-shifting typically self-consumes 30-40% of solar generation. With modest load-shifting (running one major appliance during peak hours daily), this rises to 50-70%. That is the difference between saving £150 and saving £300 per year.

Week 1 Checks: Is Everything Working?

At the end of your first week, run through this checklist:

Generation check:

• Has the system generated at least 3-5 kWh per day on sunny days? (For an 800W system in summer)
• Is generation tracking roughly with the PVGIS estimate for your location?
• Are both panels producing similar output?

If generation seems low, see our troubleshooting guide.

Smart meter check:

• Compare your week 1 import readings to a typical week before solar
• You should see a noticeable reduction in grid import
• If your smart meter shows export, check how much — high export means you are not self-consuming enough

For detailed smart meter guidance, see our smart meter and solar guide.

Physical check:

• Are the mounting brackets secure? Give them a gentle tug
• Are cables tidy and protected from weather? Use cable clips if needed
• Is the inverter showing a steady green light (or equivalent status indicator)?
• Any water pooling around cables or connections?

App check:

• Is the monitoring app recording consistently?
• Are there any error codes or warnings?
• Is the WiFi connection stable?

Common First-Week Surprises

"It generates electricity even on cloudy days." Yes. Modern monocrystalline panels work well in diffuse light. You will not get peak output, but a completely overcast day still produces 1-2 kWh from an 800W system.

"My smart meter is showing export." This means you are generating more than you are using at that moment. Solar electricity flows to the path of least resistance — if nothing in your home is consuming it, it goes back to the grid. This is normal but represents lost savings. Shift more loads to daylight hours.

"The generation numbers in the app do not match my smart meter." They measure different things. The solar app shows what the panels generate. The smart meter shows what you import from and export to the grid. The difference between the two is your self-consumption. See our smart meter self-consumption guide.

"It is noisier than I expected." Micro-inverters are virtually silent. If you hear a hum, check whether the inverter is vibrating against its mounting surface. A small piece of rubber matting underneath usually fixes this.

"I am already thinking about a second system." Hold that thought. The interim product specification limits you to one system per household. Focus on maximising what you have through load-shifting and, eventually, battery storage.

What Comes After Week 1

With a solid first week behind you, you are ready to optimise. Over the coming weeks:

• Track your savings. Take monthly smart meter readings and compare to the same month last year. Our savings calculator can help you estimate what to expect.
• Refine your load-shifting. As you learn your generation pattern, you will get better at timing appliance use.
• Consider a smart energy tariff. Some tariffs offer better export rates. See our best tariffs for solar users.
• Plan for the seasons. Generation will change significantly throughout the year. Read our year one guide for what to expect month by month.

The first week is about getting set up and understanding the basics. The real savings build over months and years — and they start now.