PBD Energy Intelligence
Before buying solar panels,understand your investment.
Explore solar system size, space and a planning budget for your home or business, using your bill consumption.
Indicative estimate. No batteries. Savings and financing require further analysis.
01Your consumption and tariff
The starting point
02Sunlight in your area
Located with your postal code
03An investment range
With visible assumptions
YOUR FIRST ESTIMATE
From your bill to size and budget
We need consumption, tariff and postal code. Choose your starting point; we guide you through anything missing.
- 1Your inputs
- 2Free registration
- 3Your result
Preparing the calculator...
FROM INPUT TO DECISION
How we build your estimate
Each step adds information and has a limit. You can understand the approach before registering.
- 1
From your bill to energy
Bill kWh indicate consumption. Payment mixes consumption and other charges; we help you find kWh before calculating.
Declared consumption
- 2
Sunlight in your area
Your postal code locates an approximate area. PVGIS models solar output, not your roof, shading or installation.
Solar resource model
- 3
A sizing scenario
We size for about 80% of annual consumption. This is an energy target for this calculation, not a savings promise.
PBD assumption: 80%
- 4
An investment range
Capacity in Wp DC × capacity-based price × reference exchange rate. We interpolate planning bands for 3-300 kWp and add assumed 16% VAT. PV only, without batteries.
Reference, not a quote
The free result guides sizing and investment. Savings, backup or financing decisions require bills, site conditions and, where relevant, time periods and demand.
View price references by capacity
Installed USD/Wp DC, before VAT. Cutoff: 3 Oct 2026. Source-derived planning bands, not a national average or confidence intervals.
3-10 kWp DC
USD 0.75-1.25/Wp
Segment central reference: USD 1.05/Wp
10-50 kWp DC
USD 0.85-1.20/Wp
Segment central reference: USD 1.00/Wp
50-100 kWp DC
USD 0.80-1.10/Wp
Segment central reference: USD 0.95/Wp
100-300 kWp DC
USD 0.75-1.10/Wp
Segment central reference: USD 0.90/Wp
The calculation interpolates between the capacity midpoints of these segments to avoid budget jumps. This is a PBD analytical rule, not a curve fitted to contracts. Outside 3-300 kWp we do not publish an automatic budget.
Includes equipment, BOS, engineering, installation, commissioning and ordinary integration, including integrator margin. Excludes batteries, financing, future maintenance and extraordinary works. The budget adds an assumed 16% VAT.
UNDERSTAND YOUR OPTIONS
What changes between systems?
Choose a system and situation. Arrows show where energy comes from and goes. These examples explain functions; they do not size or price batteries.
Generate solar energy while the grid is available.
1Panels + inverter
3Switchboard & control
4Grid + metering
5Home / business
Sun + surplus
Example with generation above consumption: some supplies loads and the surplus goes to the grid.
- Panels + inverter → Switchboard & control
- Switchboard & control → Home / business
- Switchboard & control → Grid + metering
Conventional grid-connected PV disconnects during an outage. Surplus treatment depends on the interconnection agreement.
Backup fundamentals: U.S. Department of Energy. BESS operation: SAM · battery dispatch.
Questions that change the decision
Do panels power my site during an outage?
Conventional grid-connected PV disconnects when the grid fails. Backup requires compatible architecture, isolation and available energy. Check the outage scenario above.
Does the price include batteries?
No. The price range is for PV only and varies with system size. Installed USD-per-watt references are shown before VAT; the budget adds the stated VAT. Batteries and BESS need kWh capacity, kW power and a separate budget.
Does generating 80% mean saving 80%?
No. Generated energy and money saved are different quantities. Tariff, timing, subsidies, fixed charges and demand affect financial results. This calculator does not estimate those savings.
Does my postal code determine my tariff?
No. It locates an area for solar resource. Copy your tariff from the bill. kWh support a physical scenario; we do not infer your bill from regional charges.
What do I need if my tariff is GDMTH?
For PV sizing, enter period kWh. BESS or savings assessment needs time-period consumption, demand and an operating profile. Total payment alone does not determine the opportunity.
Can I use just one bill?
Yes, as a reference. Weather or operating changes can make it unrepresentative of the year. An average across 12 comparable months helps, but a site review remains necessary.
What does a PBD analysis provide?
An agreed scope for reviewing evidence, comparing alternatives and explaining assumptions, risks and remaining checks. Quotes or financing can be included where relevant. Fees are agreed before work begins; credit or automatic returns are not promised.
Where do I find kWh and how do I average them?
See the visual example and use the same period selected in the calculator.
Investment starts with a sound decision
If you need to compare PV, backup, BESS or an existing proposal, request a scope for an independent PBD analysis. We start with your question and the evidence needed to answer it.
Scope my PBD analysisEditable WhatsApp message; analysis is quoted before work starts.