Best honest payback
{% if initial.best %}
{{ initial.best.title }}
- Annual savings (year-1)
- €{{ '%.0f' % initial.best.lp_year1 }}/yr
- Payback
- {{ '%.1f' % initial.best.lp_payback }} years
- Battery
- {{ '%.2f' % initial.best.capacity_kwh }} kWh / {{ '%.1f' % initial.best.power_kw }} kW · €{{ '%.0f' % initial.best.price_eur }}
- Store quote
- €{{ '%.0f' % initial.best.store_year1 }}/yr ({{ '%.1f' % initial.best.store_payback }} yr) — overstates by {{ '%.2f' % initial.best.overstatement }}×
Full leaderboard ({{ initial.batteries|length }} batteries · {{ initial.elapsed_seconds }}s · existing PV exports at the meter (capturable by a battery): {{ '%.0f' % initial.total_surplus_kwh }} kWh/yr)
| # | Battery | kWh | kW | € | LP €/yr | LP yr | 10-yr net | cycles | kWh capt | % capt | % full | % sat |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| {{ loop.index }} | {{ r.title }} | {{ '%.2f' % r.capacity_kwh }} | {{ '%.1f' % r.power_kw }} | €{{ '%.0f' % r.price_eur }} | €{{ '%.0f' % r.lp_year1 }} | {% if r.lp_payback %}{{ '%.1f' % r.lp_payback }}{% else %}—{% endif %} | €{{ '%.0f' % r.ten_year_profit_eur }} | {{ '%.0f' % r.cycles_per_year }} | {{ '%.0f' % r.captured_kwh }} | {{ '%.0f' % r.captured_pct }}% | {{ '%.0f' % r.pct_hours_battery_full }}% | {{ '%.0f' % r.pct_hours_charge_saturated }}% |
- LP €/yr
- Honest year-1 savings from our linear-program oracle (perfect 24h foresight).
- LP yr
- Years until cumulative savings (with the chosen inflation rate) recoup the battery cost.
- 10-yr net
- Total profit over 10 years: cumulative savings (compounded by inflation) minus the battery cost. Red = doesn't break even within 10 yr.
- cycles
- Total discharge throughput per year, divided by capacity. Includes both surplus capture and grid arbitrage (charging during cheap hours from the grid even when no surplus is exporting). Useful as a "how busy is the battery" metric.
- kWh capt
- kWh of meter-export (existing PV pushing back) that this battery absorbs before it crosses the meter.
- % capt
- That, as a percentage of the scenario's existing-PV meter-export shown in the heading. Note: solar that's directly self-consumed during sunny hours never crosses the meter and is invisible to a battery.
- % full
- Of all export hours, the % when the battery was already full and couldn't store more — capacity-bottlenecked.
- % sat
- Of all export hours, the % when charging was pegged at max kW and couldn't keep up — power-bottlenecked.