You agree a price. Then the extras start. "Cable is extra." "Breaker is extra." Here is how to avoid that.
The usual surprises
| Hidden cost | What it is |
|---|---|
| Cables | Thick DC and AC cable, especially on upstairs buildings |
| Protection | DC and AC breakers, fuses, surge protection |
| Earthing | Earth rod and cable |
| Mounting | Rails, clamps, roof hooks |
| Roof repairs | Weak timber or rusty sheets |
| Transport | Long trips or boats (Bonny, Brass) |
| Battery stand | Wall bracket or raised base |
| More battery | When the first one runs out too early |
How to avoid them
- Ask for an itemised quote.
- Ask: "Is this the full price, installed?"
- Check that protection and earthing are listed.
- Size the battery right the first time.
- Get transport costs in writing.
Running costs to expect
- Panel cleaning. Read how to clean panels.
- A yearly connection and settings check.
- Lead-acid replacement (avoid with lithium).
