enclosure ratingNEMAIP ratingoutdoor installspec data

Outdoor home battery installs: IP and NEMA ratings by model

Outdoor-rated home batteries: enclosure ratings and outdoor stance for all 17 models we track, from each datasheet. One publishes IP30 and calls itself indoor.

The Home Battery ReportAugust 19, 20269 min read✓ Verified

"Outdoor rated" is printed on almost every home battery brochure and it covers at least five different levels of protection. NEMA 3R, NEMA 4, NEMA 4X, IP55, IP65 and IP67 all appear across the 17 models on our comparison pages, they do not mean the same thing, and NEMA's own documentation says two of those systems cannot be converted into each other in the direction buyers usually want.

This page is the model-by-model reference: what each maker publishes as an enclosure rating, and what each maker publishes about outdoor installation, quoted from the current datasheet. Where a maker publishes no outdoor statement we record that rather than assuming one. Where the box goes in code terms is a separate question covered in where to install a home battery, and what the ambient temperature has to be is covered in the temperature range guide. We have not tested any of these products.

Enclosure rating and outdoor stance by model

| Model | Enclosure rating as published | Outdoor stance as published |

| --- | --- | --- |

| Tesla Powerwall 3 | Enclosure Rating NEMA 3R; Ingress Rating IP67 (battery and power electronics), IP55 (wiring compartment) | "Environment: Indoor and outdoor rated"; mounting floor or wall |

| Tesla Powerwall 2 | Enclosure Type NEMA 3R; Ingress Rating IP67 (battery and power electronics), IP56 (wiring compartment) | "Environment: Indoor and outdoor rated"; "Wet Location Rating: Yes". Discontinued |

| FranklinWH aPower 2 | Enclosure Type 3R; Ingress Protection IP56 (wiring), IP67 (battery pack and inverter); Flood Resistance (IP67) up to 29 in from bottom | "Environment: Indoor / outdoor" |

| Enphase IQ Battery 5P | "Enclosure: Outdoor-NEMA 3R"; IQ8D-BAT microinverter enclosure NEMA type 6 | Footnote instructs a non-habitable indoor location "(like a 2-car garage) or an outdoor location" within the stated temperature and humidity |

| Enphase IQ Battery 10C | "Enclosure: Outdoor-NEMA 3R" | Same footnote, stating an outdoor location within minus 4 to 131 degrees F |

| Generac PWRcell | "Environment: NEMA 3R (all enclosures)"; battery cabinet Enclosure Rating NEMA 3R; SDS and inverter NEMA 3R | "Indoor and outdoor rated"; "Suitable for indoor and outdoor wall mount with NEMA 3R rating"; battery cabinet "Suitable for use in residential non-habitable spaces" |

| SolarEdge Home Battery 400V | "Enclosure Protection: IP55 / NEMA 3R - indoor and outdoor (water and dust protection)" | "Flexible installation, wall or floor mount, indoor or outdoor", with a footnote that direct sunlight is allowed only within the ambient operating range |

| Panasonic EverVolt 2.0 | Battery Protection Rating NEMA 4X; inverter NEMA 4X; SmartBox Protection Rating NEMA 3R | "Indoor/outdoor rated durable weatherproof design"; installation "indoors or outdoors, wall mounted or floor mounted" |

| Anker SOLIX X1 | Enclosure Type NEMA 4 on the battery; NEMA 3R on the Backup Controller 200-H | "Installation Options: Wall or Ground", footnoted "Additional components are needed for ground installation" |

| Savant Power Storage 20 | Enclosure Type NEMA 4X | No indoor or outdoor sentence published |

| Qcells Q.HOME CORE | Protection class NEMA 4X on the Q.VOLT inverter and the Q.SAVE battery; NEMA 3R on the Q.HOME HUB | No indoor or outdoor sentence published; hub listed as floor or wall mounted |

| LG Home 8 | Enclosure "NEMA Type 3R", footnoted "Tested by NEMA 250" | No indoor or outdoor sentence published; mounting "Floor Stand with Wall Support, and Wall Mount" |

| EG4 PowerPro WallMount | Ingress Protection IP65 | Document titled "All Weather Battery"; self-heating described as "A key feature for outdoor LiFePO4 battery cell operation" |

| Fortress Power eVault Max 18.5 | Enclosure Protection IP55; "IP55 Aluminum Industrial Grade Enclosure" | No indoor or outdoor sentence published |

| BYD Battery-Box Premium HVS | Enclosure Protection Rating IP55 | No indoor or outdoor sentence published |

| SunPower SunVault | Enclosure Type / Ingress Rating "NEMA Type 3R / IP54" | "Environmental Rating: Indoor and outdoor rated". Discontinued |

| sonnen sonnenCore+ | Enclosure rating IP30 | No outdoor rating published; the datasheet opens by calling it "a stackable indoor solution" |

Sources, in the order the models appear: Powerwall 3 datasheet, Powerwall 2 datasheet, FranklinWH aPower 2 datasheet, Dec 2025, Enphase IQ Battery 5P datasheet, May 2025, Enphase IQ Battery 10C datasheet, Feb 2026, Generac PWRcell 2 spec guide, Jul 2025, SolarEdge Home Battery 400V datasheet, Jan 2026, Panasonic EverVolt Home Battery System datasheet, marked preliminary, rev 2023, Anker SOLIX X1 AC-coupled datasheet, US, rev 2025-03, Savant Power Storage 20 specification sheet, 009-2477-00, Qcells Q.HOME CORE datasheet, H3S and H7S, May 2025, LG official spec page for the RA768K16A11, EG4 PowerPro WallMount spec sheet, ver. 1.0.1, Fortress Power eVault Max 18.5 technical datasheet, BYD Battery-Box Premium HVS and HVM datasheet V1.7 EN, SunPower SunVault ESS datasheet, RevC 2021, sonnenCore+ technical specifications. All read August 19, 2026.

What the NEMA types in that table actually claim

NEMA publishes free definitions for its enclosure types, drawn from NEMA Standards Publication 250. The three that appear on home batteries, quoted:

Type 3R. "Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt); to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (rain, sleet, snow); and that will be undamaged by the external formation of ice on the enclosure."
Type 4. The same, plus windblown dust in the solid objects list and "splashing water, and hose directed water" in the water list.
Type 4X. The Type 4 protections plus "an additional level of protection against corrosion".

Source: NEMA Enclosure Types, National Electrical Manufacturers Association, read August 19, 2026.

The practical gap between 3R and 4 is windblown dust and hose directed water. A NEMA 3R unit is rated for weather falling on it. It is not rated for a pressure washer aimed at it or for a dusty windy site, which is worth knowing before someone cleans the driveway. The step from 4 to 4X is corrosion, which is why Savant, Panasonic and Qcells publishing 4X reads differently within a few miles of salt water than it does inland.

Why an IP number and a NEMA number are not interchangeable

Four products in our set publish an IP code and no NEMA type: EG4 at IP65, Fortress Power and BYD at IP55, and sonnen at IP30. Five publish both, and the two Tesla units are the most granular in the group, splitting the ingress rating between the battery and the wiring compartment.

IP codes come from IEC 60529. As NEMA's own comparison text puts it, "The IEC designation consists of the letters IP followed by two numerals. The first characteristic numeral indicates the degree of protection provided by the enclosure with respect to persons and solid foreign objects entering the enclosure. The second characteristic numeral indicates the degree of protection provided by the enclosure with respect to the harmful ingress of water."

The part buyers should take from that same document is the conversion warning. NEMA publishes a table converting its type numbers into IEC classifications, and prints across the top of it: "(Cannot be Used to Convert IEC Classification Designations to NEMA Type Ratings)". The body text gives the reason: "The enclosure type numbers meet or exceed the test requirements for the associated IEC Classification; for this reason Table A-1 cannot be used to convert from IEC Classifications to enclosure Type numbers." Elsewhere the same document explains why, noting that IEC 60529 "does not specify degrees of protection against mechanical damage of equipment, risk of explosions, or conditions such as moisture (produced for example by condensation), corrosive vapors, fungus, or vermin", while the NEMA standard "does test for environmental conditions such as corrosion, rust, icing, oil, and coolants".

So the conversion runs one way only. A NEMA 3R enclosure can be said to meet certain IP levels. An IP55 enclosure cannot be said to be equivalent to a NEMA type, because the tests NEMA adds were never run on it. Any comparison table that lines up IP and NEMA numbers as equals is doing something NEMA explicitly says its own table cannot do.

The one product in our set with no outdoor rating

sonnen is the exception and the datasheet is not hiding it. The sonnenCore+ technical specifications publish "Enclosure rating: IP30", and the document's opening sentence describes the product as "a stackable indoor solution that offers up to 60 kWh of battery capacity".

Read the code against the IEC definition above and the second character is the water digit. A zero there is not a low level of water protection, it is none claimed. That is a coherent design choice for a product intended to live in a garage or a utility room, and it is a hard constraint if the only wall you have is outside.

The rating covers one box, and the weakest box governs

A home battery system is rarely one enclosure, and on four of these products the ratings are not uniform across the boxes.

Panasonic: NEMA 4X on the battery and on the inverter, NEMA 3R on the SmartBox.
Qcells: NEMA 4X on the Q.SAVE battery and the Q.VOLT inverter, NEMA 3R on the Q.HOME HUB.
Anker: NEMA 4 on the SOLIX X1, NEMA 3R on the Backup Controller 200-H.
Tesla: NEMA 3R on the Powerwall 3, on Gateway 3, on Backup Gateway 2 and on the Backup Switch, which is one of the few consistent sets in the group.
Generac removes the question entirely by publishing "NEMA 3R (all enclosures)".

Where the ratings differ, the lowest one is the system's real exposure limit, because the controller has to go somewhere too and it is usually near the battery. The same principle applies to the temperature tables, where Panasonic's SmartBox is again the narrowest component, and that analysis is in the temperature range guide. The published sizes and weights of those extra boxes are in the dimensions guide.

An outdoor rating is not a temperature permission, and neither is code approval

Two closing cautions, because an enclosure rating settles less than it looks like it settles.

Temperature is a separate specification and it rules out more locations than water does. SolarEdge footnotes that "Installation in direct sunlight is allowed only when the ambient temperature is within the Ambient Operating Temperature Range". Enphase instructs installers to avoid direct sunlight so the unit stays within its optimal operating range. Several makers publish derating thresholds well inside their headline ceilings. A NEMA 4X cabinet on a south-facing wall in Phoenix is still a NEMA 4X cabinet, and it may still be outside its rated performance band on an August afternoon.

Code decides where the box may go, and the datasheet only decides what the box can take. Permitted locations, separation from doors and windows, gypsum board on unfinished walls, vehicle impact protection and aggregate energy limits are set by the fire code your jurisdiction adopted, not by the enclosure rating. That whole subject is in where to install a home battery, and the standards behind it are in our UL 9540 and NFPA 855 guide.

Every rating above is a manufacturer datasheet claim recorded with its published wording, or a recorded absence of one. None of it is a measurement we made, and none of it substitutes for the clearance, mounting and location requirements in the installation manual for the exact model you are quoted.

Frequently asked questions

Can a home battery be installed outside?

Most of them, yes, and the datasheet says which. Of the 17 models we track, eight publish a NEMA enclosure type alone, five publish both a NEMA type and an IP code, and four publish an IP code alone. Seven publish an explicit indoor and outdoor sentence in the environmental table: both Tesla Powerwalls, FranklinWH, Generac, SolarEdge, SunPower and Panasonic. Enphase labels its enclosure row Outdoor-NEMA 3R and its footnote names an outdoor location as a permitted choice. Anker publishes NEMA 4 with wall or ground installation. LG, Qcells, Savant, Fortress Power and BYD publish a rating with no accompanying indoor or outdoor sentence.

Which home battery cannot go outdoors?

The sonnen sonnenCore+ is the one product in our set with no outdoor rating. Its technical specifications publish an enclosure rating of IP30, and the document's own opening line describes the product as a stackable indoor solution. Under IEC 60529 the second character of an IP code is the water protection digit, and a zero there means none is claimed. Every other model we track publishes a rating with a water protection level attached.

Is NEMA 3R good enough for outdoors?

NEMA defines Type 3R as constructed for either indoor or outdoor use, protecting personnel against access to hazardous parts, protecting the equipment against ingress of falling dirt, protecting against harmful effects from the ingress of rain, sleet and snow, and undamaged by external ice formation. What Type 3R does not claim, and Type 4 does, is protection against windblown dust and hose directed water. Type 4X adds corrosion protection on top of that, which is why it turns up on coastal-facing products.

Can I compare an IP rating against a NEMA rating?

Not in the direction most people try. NEMA's own comparison document is explicit: its conversion table runs from NEMA type numbers to IEC classifications only, and states that the table cannot be used to convert from IEC classifications to enclosure type numbers. The reason NEMA gives is that its standard also tests for corrosion, rust, icing, oil and coolants, which IEC 60529 does not. So a maker publishing IP55 has not told you the same thing as a maker publishing NEMA 3R, and neither number alone settles a comparison.

Does an outdoor rating mean the battery will work in my climate?

No, and this is the most expensive confusion on the subject. The enclosure rating is about water and dust. The operating temperature range is a separate line and it is usually the binding one. SolarEdge footnotes that installation in direct sunlight is allowed only when the ambient temperature stays inside the operating range, and Enphase instructs installers to avoid direct sunlight so the unit stays in its optimal operating range. Our temperature range guide has the model-by-model figures and the derating thresholds that sit inside the headline limits.

Does the rating cover the whole system?

Usually not, and the difference matters because the weakest box governs. Panasonic publishes NEMA 4X for the battery and the inverter and NEMA 3R for the SmartBox. Qcells publishes NEMA 4X for the battery and the inverter and NEMA 3R for the Q.HOME HUB. Anker publishes NEMA 4 on the SOLIX X1 battery and NEMA 3R on the Backup Controller 200-H. Generac is the exception that states it plainly, publishing NEMA 3R for all enclosures. Read the environmental table for every box in the quote.