What Percentage of Your Base Load Can 800W Solar Cover?
Your base load (fridge, router, standby) runs 24/7. Here's how much an 800W plug-in solar kit realistically covers in the UK.
What Is Base Load?
Your base load is the electricity your home consumes continuously — fridge, freezer, router, standby devices, alarms, clocks. A typical UK household's base load is 200-400W.
How Much Does 800W Solar Cover?
An 800W system doesn't produce 800W constantly. Daily generation follows the sun:
| Time | Typical output (sunny day, south facing) |
|---|---|
| 7-8am | 100-200W |
| 9-10am | 300-500W |
| 11am-2pm | 600-800W |
| 3-4pm | 400-600W |
| 5-6pm | 200-400W |
| 7-8pm | 50-150W |
On a good summer day, your 800W system exceeds your base load for 8-10 hours, covering it completely during those hours.
Annual Base Load Coverage
| Season | Daily solar hours > base load | Base load covered |
|---|---|---|
| Summer (Jun-Aug) | 10-14 hrs | 60-80% |
| Spring/Autumn | 6-10 hrs | 35-55% |
| Winter (Dec-Feb) | 2-5 hrs | 10-25% |
| Annual average | ~40-55% |
Real-World Savings
For a household with a 300W base load (£642/year at 24.5p/kWh):
| Scenario | Base load covered by solar | Annual saving |
|---|---|---|
| Low (north, poor angle) | 35% | £225 |
| Average (Midlands, south-facing) | 45% | £289 |
| High (south, optimised) | 55% | £353 |
These figures represent the value of your base load coverage alone — additional savings come from running schedulable appliances during solar hours.
- 800W dual-panel plug-in solar kit
- 600Wh battery with smart scheduling
- App monitoring with real-time generation data
- Balcony, garden & flat-roof mounts available
Can I cover my entire base load with solar?
Only during daylight hours. Without a battery, night-time base load must come from the grid. A battery system extends coverage into the evening.
What's the cheapest way to reduce base load?
Switch to LED lighting, use smart power strips to eliminate standby drain, and replace old fridges with A-rated models. Reducing base load by 100W saves £214/year.
Does a lower base load make solar less worthwhile?
Paradoxically, a lower base load means a higher percentage is covered by solar (less to cover). But the absolute saving is less. The calculator accounts for this.
See how much plug-in solar could save you — with real data for your postcode.