A battery model with boundaries
Configure power, energy capacity, SoC window, efficiency, C-rate and directional power limits.
Invalid combinations are rejected at input.
Battery storage and BESS ROI
Support which BESS variant fits the client case.
Connect battery power, capacity and dispatch with client data, grid limits, tariffs and financial assumptions.
Battery model, energy flows and financial assumptions connected
LianderStedinEnexisTenneTEPEX SPOTKNMI
The problem — The solution
The problem
kW, kWh and efficiency are too often treated as one number.
Dispatch, usable SoC window, losses, degradation and replacement together determine what the battery actually does.
- Power and energy capacity confused
- Peak reduction without an interval profile
- Financial assumptions without lifecycle effects
The solution
Put engineering and finance in the same scenario.
Configure the BESS, simulate energy flows and connect investment, maintenance and replacement assumptions to the outcome.
- kW and kWh configured separately
- SoC, efficiency and losses visible
- Costs, cash flows and replacement in the comparison
From data sheet to business case
A BESS does not earn its return through capacity alone.
Configure the BESS, simulate energy flows and connect investment, maintenance and replacement assumptions to the outcome.
Dispatch per interval
Track charging, discharging, conversion loss, standby loss and stored energy on the project timeline.
The energy balance remains traceable by interval and year.
Compare capacity variants
Test multiple kW and kWh configurations and assess the resulting energy and peak outcomes.
A sizing result can only be applied to its unchanged source configuration.
Lifecycle in the business case
Include CAPEX, OPEX, lifetime, degradation and replacement assumptions in the financial view.
NPV and payback follow from project inputs and are not guaranteed.The calculation basis stays visible.
Every conclusion remains attached to the resolution, limits and inputs that determine it.
2
capacity dimensions
Power in kW and energy capacity in kWh.
3
SoC positions
Initial, minimum and maximum state of charge.
15 min
dispatch interval
Battery flows follow the canonical interval timeline.
How it works
Build an auditable BESS business case for your client in three steps.
Define the site
Import load and generation and configure the connection, contract and tariffs.
Define the battery variant
Enter kW, kWh, SoC, efficiency and financial assumptions.
Compare engineering and finance
Assess dispatch, peak demand, cash flows, NPV and payback per variant.
Illustrative decision case
An adviser chooses the suitable battery, not the largest one.
An adviser evaluates battery storage for self-consumption and a lower import peak for a fictional client with PV.
In the scenario
- Interval profile
- PV generation
- Connection limits
- Multiple kW and kWh variants
- CAPEX and replacement
What becomes visible
Additional energy capacity only creates value when the profile and power window can actually use it.
Decision direction
Compare smaller and larger variants using equal dispatch and financial assumptions before selecting a preferred configuration.
This is a fictional example, not a customer result, quote or return guarantee. Actual outcomes depend on data, tariffs and assumptions.Illustrative decision case
Compact variantCompare
Mid-size variantSupport
Large variantTest capacity
Read next
Support the assumptions behind the model too.
A practical guide connected to this decision.
Explore the knowledge baseFAQ
Specific questions, answered directly.
What is the difference between kW and kWh in a BESS?
kW is charging and discharging power. kWh is the amount of energy the battery can store. Both constrain dispatch and must be configured separately.
Can PeakPilot guarantee the optimal battery?
No. PeakPilot can compare configurations and sizing rules, but the preferred variant depends on the objective, source data, technical limits and financial assumptions.
Are battery losses and degradation included?
The battery model supports charging and discharging efficiency, standby loss and annual degradation. Use project-specific values from technical documentation.
Can I assess peak shaving and higher PV self-consumption together?
You can review the relevant energy and peak outcomes side by side. Keep the dispatch objective and scenario assumptions explicit so the comparison remains traceable.
How are replacement costs handled?
Define lifetime and replacement cost per kWh in the financial assumptions. PeakPilot can derive replacement events within the project lifetime.
Is the calculated ROI a quote or guarantee?
No. It is a model estimate based on entered costs, tariffs, performance and lifetime. Always verify investment and contract terms.
Test the client's BESS before capacity is purchased.
Compare battery variants using the same client data and financial assumptions.
Start a free simulation