Before you buy anything, compare the options properly.
A solar installer can tell you what they can sell you. We can independently model different panel layouts, battery capacities and electricity tariffs to explore what actually makes sense for your home.
Does the bigger system actually earn its keep?
Panel layout
Compare panel number, capacity, orientation and expected generation rather than relying only on headline system size.
Battery capacity
Compare smaller and larger storage options against the household's actual demand and likely solar surplus.
Tariffs
Model import and export tariffs, including time-of-use pricing, because when energy is bought and sold can change the answer.
Our comparison is about modelling the options, not earning margin on a particular panel or battery.
Possible comparisons
Solar only
Solar + smaller battery
Solar + larger battery
Alternative panel layouts
Fixed vs time-of-use tariffs
Different export tariffs
Optimised battery operation
A comparison you can interrogate.
The aim is not a suspiciously precise promise. It is a transparent estimate showing the assumptions and how different choices affect annual import cost, export income, self-consumption and indicative payback.
| Scenario | Annual bill | Export income | Net energy cost | Indicative payback |
|---|---|---|---|---|
| Existing setup | £X | £Y | £Z | Baseline |
| Solar only | ... | ... | ... | ... |
| Solar + battery | ... | ... | ... | ... |
| Solar + battery + smart tariff | ... | ... | ... | ... |
Illustrative format only. Any real comparison will state its assumptions and should be treated as an estimate rather than a guarantee of future bills or payback.