Changelog
What changed in each release
v1.37.4
2026-09-13
FixUpdated the SSE Airtricity Smart EV Charge plan using SSE's own published price sheet. The previous figures were out of date and did not include the 15% new-customer discount, so this plan now compares fairly with the others.
FixCorrected the standing charge for the Bord Gáis Energy EV plan, which was about €66 a year too low.
FixPinergy's price rise of 14 September 2026 is now included in the comparison.
InfraSSE Airtricity, Bord Gáis Energy and Energia have all announced price rises for October 2026; the comparison will be refreshed once their new prices are published.
v1.37.3
2026-09-03
FixCorrected the prices used for several suppliers. Some Ecopower, Pinergy and SSE Airtricity rates and standing charges had been recorded without VAT added, and the Flogas prices were out of date. This made those suppliers look cheaper than they really are — by as much as €290 a year in Ecopower's case — which could have pointed you towards the wrong plan. Every supplier has now been rechecked against its own published price list.
FixThe Pinergy electric-vehicle plan is now shown under its correct name, Lifestyle EV Night Time, with the right night-time rate. It is also marked as closed to new customers, so you know you can no longer sign up to it.
FixFixed the Ecopower day/night plan, which was showing the flat 24-hour price as its daytime rate.
InfraPinergy has announced a price rise from 14 September 2026 which is not yet included; prices will be refreshed again after that date.
v1.37.2
2026-09-02
FeatureSupplier prices are up to date for September 2026. Energia has cut the night-time rate on its smart plan, so the running costs and savings shown for that plan are lower than they were before.
InfraRechecked prices, standing charges, welcome discounts and solar export rates across all eight suppliers, including every Yuno Energy plan checked directly against Yuno's own published rates. Every other plan was confirmed unchanged.
v1.37.1
2026-09-02
InfraA maintenance release: routine dependency updates and upkeep of the automated security scanning. Nothing about how the site works changed.
v1.37.0
2026-08-21
FeatureYour report now includes a Seasonal breakdown — a month-by-month view of where your electricity comes from, showing how much of your usage your solar and battery would cover in each month of the year, with separate summer and winter figures. It makes clear something the yearly averages hide: a system that covers most of your usage from May to August will cover far less from November to February, because the limit in an Irish December is daylight, not battery size. Reports created before this update won't have the section — upload your file again to see it.
FeatureThe Methodology and Glossary pages now explain the seasonal figures, including the difference between how much of your solar you keep and how much of your usage you cover — two numbers that sound alike but tell opposite stories about a dark month.
FixFixed the colours in several charts. Filled areas and bars were being drawn in a default dark blue instead of the site's own colours, which made stacked charts hard to read and made some charts look wrong in dark mode.
InfraUpdated the machine-readable site summaries used by AI assistants so they describe the new seasonal figures.
v1.36.1
2026-08-20
FixCorrected how supplier prices are compared. Rates were being stored at their discounted first-year price and then discounted a second time, which made every supplier's ongoing running cost look cheaper than it really is. Each plan now uses the supplier's standard price, with the welcome discount applied only to the first 12 months, so the long-term savings figures are realistic.
FixFixed the Flogas smart plan, which was showing the rural night-time price to everyone, and removed two plans that were duplicates of others already in the list.
InfraRefreshed prices, standing charges, welcome discounts and solar export rates for all eight suppliers to their August 2026 values, verified against Electric Ireland, Bord Gáis, Energia and Yuno directly.
InfraRoutine dependency updates.
v1.36.0
2026-08-04
FeatureThe whole site has a fresh look, and you can now switch between light and dark mode — your choice is remembered next time you visit.
FeatureReports now generate dramatically faster — the tariff comparison that used to take a few seconds now appears almost instantly.
FeatureThe EV Charge Tracker now lets you record the battery percentage at the start and end of each charge, and the charge history is split into tabs so you can move between views more easily.
FixFixed an issue where the navigation area could appear as a blank card when saving your report as a PDF.
InfraFixed a problem that could stop new releases from being deployed correctly.
InfraRoutine dependency updates.
v1.34.1
2026-07-21
InfraRefreshed the electricity tariff comparison with the latest supplier prices.
InfraYour saved data is now backed up automatically for safekeeping.
InfraRoutine dependency updates.
v1.34.0
2026-07-05
FeatureThe EV Charge Tracker now lets you log your weekly mileage — just enter the date and the kilometres you drove. You can optionally record your energy efficiency (kWh/100km) too, and line charts show how your distance and efficiency change over time. Your mileage is included in account backups.
InfraRoutine dependency updates.
v1.33.1
2026-07-04
InfraRefreshed the electricity tariff comparison with July 2026 supplier prices — including Electric Ireland's and Yuno Energy's recent price increases — corrected some out-of-date Yuno Energy rates, and added Yuno's EV plans so drivers can compare their cheap overnight charging windows.
v1.33.0
2026-06-30
FeatureYou can now back up your account — export all your data to a file and restore it later if you need to.
FeatureThe EV Charge Tracker dashboard now shows your charging history and monthly trends as clearer line charts, and you can filter the view to a specific vehicle.
InfraRefreshed the electricity tariff comparison with the latest supplier rates, welcome discounts, and microgen export prices (June 2026) — including Energia's increased welcome discount and Yuno Energy's higher export rate.
InfraRoutine maintenance, dependency updates, and chart-library cleanup.
v1.32.0
2026-06-17
FeatureIntroduced the EV Charge Tracker — a companion tool (currently invite-only) for logging your car's charging. Record each home, public, or solar charge to see what it cost across day, night, and peak rates, then follow your spending and energy use over time with monthly charts and a breakdown of home-grid vs solar vs public charging. You can also download your full charge history as a spreadsheet.
InfraUpdated our Privacy policy to explain how the EV Charge Tracker handles your data.
InfraRoutine maintenance and security updates to keep the site fast and current.
v1.28.0
2026-06-11
FeatureYou can now ask an AI assistant (like Claude) connected to Home Battery Planner to work out what an EV charge cost — choose your electricity tariff, say when the car charged and how many units (kWh) it added, and get the cost broken down across day, night, and peak rates. The assistant can also list every available tariff for comparison. The "Use with AI assistants" page explains how to set this up, and there's now a direct web address developers can use to build the same calculation into their own tools.
InfraBehind-the-scenes improvements: the AI-assistant integration now deploys automatically with each release, underlying software components were updated, and search-engine indexing hints were refreshed.
v1.27.0
2026-06-10
InfraThe website's information pages (Help, Methodology, Tariffs, EV charging, and more) now load faster and are easier to find through search engines like Google.
v1.26.0
2026-06-09
FeatureNew EV charging cost calculator — pick your electricity tariff, enter when your car charged and how many kWh it added, and see exactly what that charge cost. The cost is split across each rate band the charge crossed (day, night/boost, and peak), with an effective price per unit. It works with any plan, so you can also see how much a cheaper EV or smart tariff would have saved on the same charge.
FeatureSimplified the top menu to focus on the main tools. The Help, Glossary, and "Use with AI" links have moved into the footer.
InfraUpdated underlying software components to keep the site secure and current.
v1.25.2
2026-06-02
FeatureThe Methodology page now explains all three battery sizing recommendations in detail — self-consumption (maximising use of your own solar), grid independence (minimising grid reliance), and the tariff-optimised size that shows where annual savings flatten on your chosen electricity plan.
FeatureSupplier electricity rates have been refreshed to reflect recent changes across Irish providers. The comparison table now uses up-to-date unit rates, standing charges, and export prices for all 8 suppliers.
v1.24.0
2026-05-28
FeatureBattery recommendations now include a third "Best for your tariff" option that picks the size where annual savings flatten on your chosen electricity plan — capturing night-rate arbitrage value the other two recommendations don't see. A dropdown lets you compare across all supported tariffs, and a new chart shows how annual savings change with battery size.
v1.23.0
2026-05-25
FeatureThe Tariffs page now includes a dedicated card for Electric Ireland's new Dynamic Price Plan, explaining how the wholesale-linked half-hourly pricing works, who it suits (battery owners and EV drivers with flexible loads), and what's required to switch.
FeatureThe Methodology page now explains why dynamic, wholesale-linked tariffs are deliberately excluded from the supplier comparison tool.
v1.22.0
2026-05-24
FeaturePage loads for your report and the tariff comparison are now much faster on repeat visits, thanks to a new caching layer behind the scenes.
FixRe-uploading the same file with the same settings now refreshes your report so you see the latest battery and tariff data, instead of being served the cached version from when you first uploaded.
InfraUpdated dependencies and added internal infrastructure (Redis) to support the new caching layer.
v1.21.0
2026-05-20
FeatureYou can now set the Depth of Discharge (DoD) used to size your battery, under a new "Battery settings → Advanced options" panel on the upload page. DoD is the percentage of a battery's capacity that's safe to use; most modern home batteries are 90–100%, and 90% is a sensible default. The report now also shows each matched battery's usable capacity alongside its nameplate, since vendors publish different DoD limits.
FeatureThe battery catalogue has been refreshed against current vendor datasheets. Notable changes: Huawei LUNA2000 entries are now the newer S1 series, BYD Battery-Box HVS usable capacity has been corrected (it's actually LFP at 100% DoD, not 80% as previously assumed), and three new products have been added — Pylontech US5000, GoodWe Lynx Home F, and Sungrow SBR128.
FeatureThe tariffs page now defaults to the table view (easier to compare rates side by side); you can still switch to the card view if you prefer.
FixFixed an issue where the app could fail to load after a new version was deployed if your browser had cached the old version. The app now reloads itself in the background when this happens, so you'll always see the latest version without having to manually refresh.
InfraInternal tooling to make future battery catalogue refreshes faster and more reliable.
v1.20.0
2026-05-20
FeatureThe tariff comparison now includes three more Yuno Energy plans: the EV Variable Discount Plan (10.79 c/kWh between 02:00 and 06:00 for EV and battery charging), Standard Smart (regular time-of-use), and Variable Smart Discount (lower rates across all bands in exchange for committing to Yuno's smart meter setup).
FeatureThe tariffs page table view now has sortable columns — click any column header (Plan, Standing charge, Day rate, Night/EV, Peak/Off-peak, Export) to reorder, click again to flip direction. Sorting happens within each category (standard / smart / EV) so the groupings stay intact.
v1.19.0
2026-05-19
FeatureThe tariff comparison now includes 7 new plans across two suppliers: Flogas (Standard 24hr, Smart Electricity, Smart 24hr flat, and NightSaver) and Ecopower Supply (Standard 24hr, Day/Night, and Smart Electricity). Ecopower's 15.20 c/kWh microgen export rate is the lowest currently published in Ireland — useful if you have a lot of solar surplus.
InfraInternal tooling improvements to make future tariff refreshes faster and more reliable.
v1.18.0
2026-05-19
FeatureThe tariffs page now has a table view as an alternative to the card layout, making it easier to compare rates across all plans side by side.
v1.17.0
2026-05-18
FeatureThe privacy policy now spells out that the UUID in your report URL is the only way to identify your record for deletion requests, with the existing 90-day automatic deletion as a fallback. The web server has also been reconfigured to strip IP addresses, browser, and referring page from its access logs, with the policy updated to reflect this.
FeatureElectric Ireland's EV Night Boost tariff rates and time windows have been refreshed to the latest published values.
FixThe "MSS export rate" label in the payback calculator has been renamed to "Export rate (CEG)" to match Ireland's current Clean Export Guarantee scheme.
FixTariff cards now show the correct rate label depending on whether the plan uses peak/day-rate windows.
InfraURLs ending with a trailing slash now redirect to the canonical version without one, so links to the same page always look the same.
InfraInternal dependencies updated for stability.
v1.16.2
2026-05-17
FeatureElectric Ireland's EV Night Boost plan is now included in the tariff comparison. It offers a super-cheap rate of 9.94 c/kWh between 2–4am — designed for overnight EV and battery charging — so you can see how it stacks up against the other EV plans.
v1.16.0
2026-05-17
FeatureA new public Tariffs page (accessible from the main navigation) shows current rates for all major Irish electricity plans — standard, smart, and EV — with per-unit rates, time windows, and export prices. No report upload needed to view it.
FeatureFive EV electricity plans are now included in the tariff comparison: Pinergy Lifestyle EV Drive Time, SSE Airtricity Smart EV Charge, Energia EV Smart Drive, Energia EV Smart Drive Plus, and Bord Gáis Green EV Smart. These plans have a super-cheap overnight charging window — some as low as 5.45 c/kWh — designed for EV and battery charging, so you can see exactly how much you'd save by pairing your battery with an EV plan.
FeatureThe Help page now explains how the tariff comparison works, the Glossary has new definitions for "smart tariff" and "welcome discount", and the Methodology page has a dedicated section on how cross-supplier costs are calculated.
v1.15.0
2026-05-17
FeatureA new "Compare tariffs" page on your report shows what your annual electricity bill would cost on each major Irish supplier (Electric Ireland, Bord Gáis, Energia, SSE Airtricity, Pinergy, Yuno) — comparing what you pay today, what you'd pay with the planned solar, and what you'd pay with solar plus a battery. Open it from the "Compare tariffs" button at the top of your report.
FeatureThe annual saving is broken down so you can see how much comes from installing solar vs how much extra a battery contributes — handy for deciding whether the battery is worth it on top of solar alone.
FeatureYou can adjust the battery size on the tariff page from 0 to 30 kWh and the costs update in seconds — useful for seeing whether a bigger battery actually pays back.
FeatureThe model factors in night-rate arbitrage on smart tariffs — if you're on a day/night/peak plan, the battery is assumed to charge from cheap night-rate electricity and discharge during the expensive evening peak.
FeatureEach tariff row shows how hard the battery would actually work on that plan (kWh per day, cycles per year). If you see a low cycle count highlighted in amber, the battery is bigger than your evening consumption needs and the extra capacity sits idle.
InfraTariff data for Irish suppliers refreshed to May 2026 rates (including welcome discounts, standing charges, and microgen export rates) with a new internal tool to keep these numbers current.
v1.14.0
2026-05-13
FeatureThe Help page now shows a "Last updated" date so you always know how current the download instructions are.
FeatureDirect links to specific sections of the Methodology and Help pages now work — useful for sharing a link straight to, say, the battery sizing explanation or the ESB download steps.
FeatureWhen you share homebattery.ie on social media or in a chat app like Slack, it now shows a preview image.
InfraImproved how search engines and AI assistants understand and describe the site, making it easier to find and reference.
InfraUpdated internal dependencies for stability.
v1.13.0
2026-05-12
FeatureA new Glossary page explains solar and battery terms in plain English — MPRN, kWp, depth of discharge, knee-of-curve, MSS, and more. Links to it appear on the Help and Methodology pages.
FeatureThe site navigation has been redesigned — main links now appear in the header, the current page is highlighted, and on a phone a hamburger button opens the full menu.
Feature"Common questions" sections have been added to the Help and Methodology pages, with plain-English answers about battery sizing, data requirements, payback estimates, and simulation accuracy.
InfraSearch engines and AI assistants now receive richer structured information about the site — making it more likely that tools like Google and ChatGPT give accurate answers about home battery sizing in Ireland.
v1.12.0
2026-05-11
FeatureEach page now has its own browser tab title, description, and social-media link preview — so the Methodology, Help, Use with AI, and Privacy pages all look distinct when bookmarked, shared, or opened in multiple tabs.
FeatureAI assistants like Claude and ChatGPT can now read a comprehensive plain-text summary of the site (methodology, glossary, key sizing numbers) at homebattery.ie/llms.txt — so their answers about home battery sizing stay aligned with how the tool actually works.
InfraPolished how search engines like Google discover the site — every public page is now listed in the sitemap with current dates and a unique description.
v1.11.0
2026-05-11
FeatureYou can now ask AI assistants like Claude or Cursor questions about your report — just copy your Report ID from the report menu and share it in chat to get personalised battery sizing advice.
FeatureA new "Use with AI" page explains how to connect the Home Battery Planner to Claude Desktop, Cursor, and other AI tools, with example questions to get you started.
FeatureThe report menu now has a "Copy Report ID" button, making it easy to paste your report into an AI chat.
InfraAdded a health check so the server's status can be monitored more reliably.
v1.10.0
2026-05-11
InfraThe app is now protected against floods of requests, so it stays responsive even if someone tries to bombard it with uploads or other heavy actions.
InfraUpdated internal build and development tools to keep the app stable and secure.
v1.9.0
2026-05-10
FeatureThe action buttons on the report page have been reorganised — Share, Export JSON, and Export PDF are now grouped under a small menu (⋮) so the toolbar stays clean and uncluttered.
FeatureThe "Upload another" button is now highlighted in blue so it's easier to spot when you want to analyse a different file.
v1.8.0
2026-05-10
FeatureThe report now shows a bar chart of your average daily electricity use for each month of the year, so you can easily spot seasonal differences — like how much more you use in December compared to June.
FeatureA navigation sidebar now appears on larger screens alongside your report, letting you jump directly to any section (such as Battery Recommendation or Payback) without scrolling through the whole page.
FeatureEach section of the report now has a clear heading with an icon, making it much easier to find your way around a long report.
FixFixed a crash that could occur when opening a previously saved report after the new monthly chart was introduced.
InfraUpdated internal server libraries to keep the app stable and secure.
v1.7.0
2026-05-08
FeatureYou can now download your full report as a JSON file to share with your installer or keep for your own records.
FeatureA new Changelog page is now available in the app, showing a history of all updates and improvements.
InfraAdded an automated tool to keep this changelog up to date with each new release.
v1.6.0
2026-05-07
FeatureRenamed app to "Home Battery Planner" throughout the UI.
InfraUpgraded Vite and related build dependencies to latest versions.
v1.5.0
2026-05-06
InfraAdded GitHub Actions workflows for Bearer security checks, PR tests, and automated release deployment.
InfraAdded deployment script for updating the live application via SSH.
v1.4.0
2026-05-06
FeatureAdded a second battery recommendation: "grid independence" capacity alongside the self-consumption recommendation.
FeatureBattery recommendation card now shows both self-consumption and grid-independence matched products.
v1.3.0
2026-05-06
FeatureAdded Privacy Policy and Terms of Use pages.
FeatureAdded automatic deletion of reports older than the retention period.
FeatureAdded sitemap.xml and robots.txt for SEO.
FixSet HTML language attribute to "en-IE" for better localisation.
v1.2.0
2026-05-05
FeaturePayback calculator now supports a smart (night-rate) tariff option with night-rate arbitrage savings.
FeatureAdded night-rate arbitrage explanation to the Methodology page.
v1.1.0
2026-05-05
FeatureAdded load-shift coverage, future-usage adjustments, and payback estimation sections to the Methodology page.
InfraAdded PM2 + nginx deployment documentation for non-Docker production setups.
v1.0.0
2026-05-05
FeatureAdded daily usage histogram chart with optional EV-charger load exclusion toggle.
FeatureAdded load-shift coverage chart showing how each battery size covers expensive evening hours.
FeatureAdded load-shift sizing panel with a breakdown table of battery candidates.
FeatureBattery and load-shift charts respect the "Ignore EV charger load" toggle.
v0.13.0
2026-05-04
FeatureAdded payback calculator with configurable panel cost, battery cost, import/export rates, and 25-year savings estimate.
FeatureAdded scroll-to-top behaviour on route change.
v0.12.0
2026-05-04
FeatureExisting-setup flags (EV, heat pump, WFH) now gate the corresponding "Add X" adjustment panels so you can't double-count.
v0.11.0
2026-05-04
FeatureAdded future-usage adjustment panel: model an EV, heat pump, WFH extra load, or night-rate shift on top of your CSV data.
FeatureRe-analysis with adjustments re-runs the full battery-sizing pipeline from stored rows without re-uploading.
FeatureSolar input hash added to enable deduplication when re-uploading the same file with the same solar config.
v0.10.0
2026-05-04
FeatureAdded inputs summary card showing the solar configuration used for the report.
FeatureCSV format (ESB Networks or Electric Ireland) is now shown in the inputs summary.
v0.9.0
2026-05-03
FeatureAdded support for Electric Ireland half-hourly CSV format alongside ESB Networks.
FeatureUpload form now has tabs to select the CSV source.
FixImproved solar generation curve using a skewed sine amplitude function for more realistic morning/evening profiles.
v0.8.0
2026-05-02
FeatureAdded PDF export — captures the full report as a multi-page PDF.
v0.7.0
2026-05-02
FeatureUpload form advanced options are now collapsed by default behind a toggle.
FeatureAdded orientation labels and tooltips to the solar configuration fields.
v0.6.0
2026-05-02
FeatureAdded Methodology page explaining how consumption analysis, solar simulation, and battery sizing work.
v0.5.0
2026-05-02
FeatureReports now have a shareable link — send a URL directly to your installer.
FeatureAdded Help page with instructions on how to download your ESB smart-meter data.
v0.4.0
2026-05-02
FeatureAdded inverter recommendation: sizes the hybrid inverter to your array and flags single vs three-phase.
FeatureInverter catalogue covers common all-in-one and open-coupling hybrid models.
v0.3.0
2026-05-02
FeatureAdded battery product catalogue — recommendation now matches to real products by capacity and coupling type.
v0.2.0
2026-05-02
FeatureAdded battery sizing curve chart visualising self-consumption vs capacity.
FeatureAdded hourly profile and daily consumption charts.
v0.1.0
2026-05-02
FeatureInitial release — upload an ESB CSV, configure solar array size and orientation, get a battery capacity recommendation.