---
title: "Solar blog: subsidies, prices and planning"
description: "Guides to solar subsidies, tax bonuses, financing and planning for homes and businesses, region by region, with official sources."
url: https://solarplan.app/blog
language: en
---

# Solar blog: subsidies, prices and planning

> Guides to solar subsidies, tax bonuses, financing and planning for homes and businesses, region by region, with official sources.

- [How big a home battery do you need for Ukraine's winter outages? Sizing for 2026/27](https://solarplan.app/blog/home-battery-size-ukraine-winter-outages) (2026-10-07, Markdown: https://solarplan.app/blog/home-battery-size-ukraine-winter-outages.md): How to size a battery and inverter for a Ukrainian house or flat: 12-on/12-off schedules, a day or three days without power, cold weather and winter solar.
- [Does solar work during a power outage in Ukraine? On-grid, hybrid and off-grid systems explained](https://solarplan.app/blog/does-solar-work-during-power-outage-ukraine) (2026-10-07, Markdown: https://solarplan.app/blog/does-solar-work-during-power-outage-ukraine.md): A grid-tied solar system shuts down in a blackout. Why it happens, what backup needs (hybrid inverter, battery, generator) and what works in a flat in Ukraine.
- [Ukraine's green tariff in 2026 for home solar: rate, new NEURC rules and is it worth it](https://solarplan.app/blog/ukraine-green-tariff-2026-home-solar) (2026-10-07, Markdown: https://solarplan.app/blog/ukraine-green-tariff-2026-home-solar.md): Ukraine's 2026 green tariff for home solar up to 30 kW: 613.31 kopecks/kWh excl. VAT from 1 July, new night-hour and hourly limits, how to apply, and the maths.
- [Do solar panels work in a blackout in Spain? What the 28 April outage showed](https://solarplan.app/blog/do-solar-panels-work-in-a-blackout-spain) (2026-10-07, Markdown: https://solarplan.app/blog/do-solar-panels-work-in-a-blackout-spain.md): Grid-tied solar without a battery shuts down in a blackout like Spain's 28 April outage. What backup needs: a hybrid inverter, a battery and a backup circuit.
- [Are solar panels with a battery worth it in Spain in 2026?](https://solarplan.app/blog/solar-panels-with-battery-worth-it-spain-2026) (2026-10-07, Markdown: https://solarplan.app/blog/solar-panels-with-battery-worth-it-spain-2026.md): When a home battery pays off with solar panels in Spain in 2026: cheap surplus, battery prices per kWh, payback with and without a battery, virtual batteries.
- [Spain's IRPF deduction for solar panels in 2026: 10%, 40% or 60%?](https://solarplan.app/blog/spain-irpf-solar-panel-tax-deduction-2026) (2026-10-07, Markdown: https://solarplan.app/blog/spain-irpf-solar-panel-tax-deduction-2026.md): Which Spanish income-tax deduction fits solar panels on your house in 2026: the new 10%/20% self-consumption one or the 20/40/60% energy-efficiency ones.
- [Ukraine's state energy loan for private houses: how the 20–30% repayment works](https://solarplan.app/blog/ukraine-state-energy-loan-private-houses) (2026-09-30, Markdown: https://solarplan.app/blog/ukraine-state-energy-loan-private-houses.md): How Ukraine's energy loan for private houses works: loan size and rates, the 20–30% the state repays, who qualifies, and the EBRD ESSF grant as an alternative.
- [Solar subsidies in the Valencian Community: deductions and tax bonuses](https://solarplan.app/blog/solar-subsidies-valencian-community) (2026-09-30, Markdown: https://solarplan.app/blog/solar-subsidies-valencian-community.md): The regional income-tax deduction, town IBI and ICIO bonuses and the national IRPF deduction for home solar in the Valencian Community, with official sources.