Calculator, home battery
Home Battery Savings Calculator
Indicative modelling only. Your actual result depends on interval usage, tariff, orientation, shading, equipment and incentive settings, confirmed during a proper bill and site assessment.
Assumptions
Blended import tariff $0.38/kWh · feed-in spread $0.28/kWh (±$0.06–0.08) · generation 1,350 kWh per kW per year · battery round-trip efficiency 85% · EV +7 kWh/day, pool +4 kWh/day · essential-circuits backup modelled at 0.35 kW continuous with 80% usable reserve · payback uses an indicative installed cost of $1,000–$1,400 per kWh before incentives. Ranges are used because tariffs, usage patterns and incentives materially change outcomes.
Estimated energy profile
- Daily household usage
- ≈ 17.4 kWh
- Estimated solar generation
- ≈ 8,910 kWh / yr
- Suggested battery band
- 10–13.5 kWh
- Evening load to cover
- ≈ 10.4 kWh / night
- Stored & reused daily
- ≈ 8.8 kWh
- Evening coverage
- ≈ 85% of after-dark load
- Solar self-consumption
- ≈ 61% (from ~39% exported today)
- Potential grid reduction
- up to ~51%
- Potential annual savings
- $710 – $1,160
- Indicative simple payback
- 10.3 – 23.7 years (before incentives)
- Backup configuration
- Optional, add later
- Incentive pathways
- Federal + state programs assessed at design
- VPP opportunity
- Compatible hardware recommended, your choice
Balanced profile, sizing is driven by evening peak, not total consumption.
Send this profile to an Esena consultant, calculations remain indicative until bill and site assessment.
02What happens next
From estimate to engineered plan.
Your calculator profile gives an Esena consultant a head start: we verify against your actual interval data, confirm incentive eligibility and specify equipment from manufacturer documentation, then you receive a fixed, engineered proposal.