One offer names the cabinet and usable capacity.
THE DERBY FIELD GUIDE / HOME BATTERIES
Home battery installers in Derby
The consumer unit may need work even if the battery wall is clear. Photograph both for a Derby quote and ask for a complete installed price.
START WITH THE PROPERTY
Photograph the board as well as the wall
A Derby battery location may be straightforward while the consumer unit needs new protection or space. Send clear images of labels, meter and board to make those electrical questions visible before pricing.
BEFORE YOU ACCEPT A QUOTE
List every enabling item
Ask for isolators, protection, cable routes, commissioning and any board upgrade as named costs. A hardware-only comparison can make a more complete installation look expensive when it is actually better specified.
ILLUSTRATIVE QUOTE COMPARISON
What is missing from a battery-only price?
Another includes board work, isolators, protection, cable route and commissioning.
THE DECISION
Put the enabling electrical tasks on both quotations. If the first price omits them, get a revised installed total before weighing product specifications.
ANOTHER PROJECT AT THE SAME ADDRESS?
Explore the other options in Derby.
NEXT STEP IN DERBY
Match capacity to consumption.
Electrical works can be identical for different battery sizes. Use your evening load and any solar export to judge whether a larger unit will actually be used.