Solar PV with Battery 2026 – Cost & Payback
Solar PV with Battery 2026 – Cost & Payback
Energy storage solutions for greater autonomy, night-time electricity use and better consumption control.
Last updated: September 2026.
A solar PV system with battery storage can increase self-consumption, shift part of daytime solar energy to the afternoon and evening and, with a suitable inverter and electrical design, provide backup power to selected loads.
When battery storage makes sense
- When a significant part of consumption occurs after sunset.
- When backup power during a blackout is required.
- When greater energy autonomy is a project objective.
- When storage materially improves the use of solar production under Net Billing.
How battery capacity is selected
The right battery is not selected only from the kWh on the label. We assess daytime and night-time consumption, usable capacity, maximum charge/discharge power, BMS, inverter compatibility, peak loads and the required level of autonomy.
Hellenic Energy uses LiFePO4 solutions such as Pytes V5, combined with Victron Energy, Deye or another compatible architecture depending on the project.
Cost and payback
There is no single reliable payback period that applies to every customer. The result depends on electricity purchase price, self-consumption, production, total project cost, battery use and future tariff changes. For that reason we present payback only after reviewing real consumption data.
See specific packages and prices.
Is there a subsidy?
There is currently no general open residential programme that should be presented as “Exoikonomo – Autonomo up to 40%”. Available or announced programmes change and eligibility depends on the official call.
See the current information on solar PV and battery subsidies.
Net Billing and storage
HEDNO accepts requests for simultaneous netting with storage. A battery can improve self-consumption, but its final economic value depends on the installation load profile and applicable terms.