GoodWe ESA All-in-One Review Ireland (2026): Inverter, Battery and Backup in One
Quick verdict: the GoodWe ESA is one of the neatest all-in-one home batteries now available in Ireland. The inverter, battery and backup switching come as one pre-wired, stackable unit, it’s IP66-rated for outdoor fitting, and it can back up the whole house in a power cut. It suits homeowners who want a tidy, single-brand system without the premium price of a Tesla Powerwall. Here’s my installer’s take.
What is the GoodWe ESA all-in-one?
Most solar batteries in Ireland are a hybrid inverter on the wall plus a separate battery, plus extra kit if you want backup. The GoodWe ESA series puts all of that into one modular stack: a hybrid inverter on top, LiFePO4 battery modules underneath, and built-in backup switching. GoodWe launched the single-phase ESA in Europe in early 2026, and the first residential ESA in Ireland went in this year in Ennistymon, Co. Clare: a 5kW inverter with two 8kWh batteries.
GoodWe ESA specs at a glance
| Single-phase ESA | Three-phase ESA | |
|---|---|---|
| Inverter sizes | 3 to 10kW | 5 to 30kW |
| Battery modules | BAT5 (5kWh) and BAT8 (8kWh), mixable | Modular, up to 12 modules |
| Usable storage | About 5 to 48kWh per stack | Up to around 108kWh |
| Battery chemistry | LiFePO4 (lithium iron phosphate) | |
| Protection | IP66, DC arc-fault protection (AFCI), surge protection | |
| Backup | Built-in whole-home backup switching | |
The single-phase ESA inverter only works with GoodWe’s own BAT5 and BAT8 modules, and the inverter and batteries are commissioned together, so it’s a matched system rather than a mix-and-match one.
What I like
- Tidy install. One stack instead of an inverter, battery and changeover box spread across the wall. That usually means a quicker, cleaner job.
- Real power-cut backup. Whole-home backup is built in, which matters after storms like Éowyn. Most Irish battery installs don’t have this.
- Grows with you. Start with one or two modules and add more when you get an EV or heat pump.
- Outdoor-rated. IP66 means it can go outside or in a garage, freeing up space indoors.
- Established brand. GoodWe is a Tier 1 inverter maker with UK and Ireland support, and its standard inverters are already common in Irish homes.
What to watch
- Locked to GoodWe batteries. You can’t add a cheaper third-party battery later.
- ESB Networks rules on inverter size. A single-phase home normally connects under the NC6 process for up to 6kW of export. Bigger single-phase inverters need export limiting or extra approval, so don’t just pick the biggest model.
- Newer in Ireland. Fewer Irish installers have fitted it so far, so ask your installer how many they’ve done.
GoodWe ESA vs other all-in-one batteries
| GoodWe ESA | Sigenergy SigenStor | Tesla Powerwall 3 | |
|---|---|---|---|
| All-in-one | Yes | Yes | Yes (inverter built in) |
| Modular storage | Yes, 5 and 8kWh modules | Yes | Fixed 13.5kWh per unit, expansion packs |
| Whole-home backup | Built in | With gateway | With gateway |
| Best for | Value all-in-one from a big inverter brand | Premium modular system (our top pick) | Tesla app and ecosystem |
For a full comparison, see our SigenStor review, Tesla Powerwall review and GoodWe vs SAJ.
We supply and fit batteries and inverters across Ireland, with the €600 SEAI battery grant (5kWh or more) handled for you.Battery storage & the €600 grant
Grants for a GoodWe ESA in Ireland
A GoodWe ESA fitted with solar panels by an SEAI-registered installer can qualify for up to €1,800 for the panels plus €600 for the battery. Households on certain social welfare payments can get up to €9,000. Your grant must be approved before any work starts.
Is the GoodWe ESA worth it?
If you want solar, a battery and proper power-cut backup in one tidy system from an established brand, yes, it’s well worth a look. If you’d rather mix brands or keep costs down with a separate inverter and battery, a standard GoodWe hybrid (see our GoodWe 5kW review) may suit you better. Either way, we’ll give you an honest recommendation at your free survey.
Frequently asked questions
Is the GoodWe ESA available in Ireland?
Yes. GoodWe’s UK subsidiary supports Ireland, and the first residential ESA was installed in Co. Clare in 2026.
Does the GoodWe ESA work in a power cut?
Yes. Whole-home backup switching is built in, so it can keep your home running when the grid goes down.
Can I add more batteries to a GoodWe ESA later?
Yes, by adding GoodWe BAT5 or BAT8 modules to the stack. Third-party batteries aren’t compatible.
Does the GoodWe ESA qualify for the SEAI battery grant?
A battery of 5kWh or more installed by an SEAI-registered installer can qualify for the €600 battery grant, alongside up to €1,800 for solar panels.
Thinking about a GoodWe ESA?
Free survey and a fixed quote with the €1,800 solar and €600 battery grants already taken off.
Book a free survey or call 083 480 0023
Sources: GoodWe ESA product information and Irish installation case study (Ennistymon, Co. Clare); GoodWe press release, February 2026; distributor datasheets. Specs can vary by model; confirm the exact configuration with your installer. Updated November 2026.
Related: set the ESA up for load shifting with a home battery to save in winter.
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