Battery planning for installers.
From a customer’s load profile to a signed battery offer, on real data.
Individual consultation, 14-day free trial, hear prices.
In use
Installers and EPCs plan their storage projects with hespar.
From data to decision.
hespar runs the numbers an installer would otherwise build by hand in a spreadsheet, and turns them into an offer the customer can sign.
- 01
Load profile
Upload twelve months of 15-minute data. hespar reads the site’s peaks, base load and solar yield.
- 02
Sizing
Every battery configuration is simulated against real tariffs, so the right size follows from the data.
- 03
Offer
Payback, savings and the recommended system go into a PDF offer, ready for the customer.
Sized to the site, not to the catalogue.
Each option is shown at true scale, with what it earns back. The recommendation is the one with the best net present value.
Example · Illustrative calculation
Logistics hall with a PV roof and charging park.
A fictional but typical commercial site, the kind installers plan with hespar. All values are example values.
- Site
- Logistics company, North Rhine-Westphalia
- Annual consumption
- 1,400 MWh
- PV system
- 350 kWp
- Peak load today
- 410 kW
Result with 645 kWh (example)
- Peak load
- 410 → 245 kW (−40%)
- Savings per year
- ~€31,500
- Payback
- ~6.8 years
Savings per year. Example values for illustration.
Pays back in year seven.
For the recommended 645 kWh system, the battery cuts the site’s peak load by 40%. Every figure comes from the customer’s own data.
- Peak load
- −40%
- Savings per year
- ~€31,500
- Payback
- ~6.8 years
Simulated battery sizes
- Power
- 108 kW
- Peak load
- 330 kW
- Savings/yr
- ~€15,000
- Payback
- ~6.7 years
- NPV
- ~€29k
- Power
- 215 kW
- Peak load
- 280 kW
- Savings/yr
- ~€24,500
- Payback
- ~6.3 years
- NPV
- ~€56k
- Power
- 323 kW
- Peak load
- 245 kW
- Savings/yr
- ~€31,500
- Payback
- ~6.8 years
- NPV
- ~€58k
- Power
- 430 kW
- Peak load
- 225 kW
- Savings/yr
- ~€35,500
- Payback
- ~7.7 years
- NPV
- ~€40k
Example calculation, not a customer project: logistics hall in North Rhine-Westphalia, 1,400 MWh/a, 350 kWp PV, peak load 410 kW, medium voltage (demand charge €134/kW·a, Westnetz 2026), electricity purchase approx. 16 ct/kWh, feed-in 5 ct/kWh, CAPEX approx. €40k + €230/kWh, OPEX 1%/a, 20 years, 8% discount rate. Values rounded, ±15%.
FAQ
Frequently asked questions.
Who is hespar for?
For installers and EPCs planning solar and battery projects for commercial and industrial customers in Germany, Austria, Switzerland, Benelux and Italy.
What data do I need for a sizing?
Your customer’s load profile, ideally one year of 15-minute values, the electricity tariff and, if there is one, the PV system.
What does hespar calculate?
hespar simulates self-consumption, peak shaving and price arbitrage for several battery sizes and shows payback, net present value and cash flow.
How much does hespar cost?
We discuss prices in person: book a demo, try hespar free for 14 days and receive an individual price quote.
Which countries is hespar available in?
Germany, Austria, Switzerland, Belgium, the Netherlands, Luxembourg and Italy.
Plan your next storage project with hespar.
Individual consultation, 14-day free trial, hear prices.
Book a demo