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Written from the listing and 4 buyer reviews, not from our own use · How we rate
On paper, the Garvee 27 kW Electric (240V) gets the important things right: 27 kW at 240 V and an element that only draws what it needs. It suits a whole house on electric in a warm or mild climate, at 6.3/10 on our rating.
| Brand | Garvee |
|---|---|
| Category | Electric tankless water heaters |
| Fuel | Electric |
| Stated heating power | 27 kW |
| Stated voltage | 240 V |
| Buyer reviews | 4 · 4.7/5 |
| ASIN | B0GZKBBG1N |
Full listing title: 27kW Electric Tankless Water Heater 240V Digital Instant Hot Water
| Fuel | 27kWFull listing title |
|---|---|
| Stated heating power | 27kWFull listing title |
| Stated voltage | 240VFull listing title |
Rated from the listing's specs, no buyer reviews yet
What it's made for: a whole house on electric in a warm or mild climate.
Two electric tankless heaters of about the same power, closest to it on our rating, each with a dated price.
The heating power the listing states. At 240 V it draws about 113 A. That's the line to show your electrician before anything else: the panel decides whether this fits, not the shower.
What it has going for it
Self-modulating. It draws only the power the flow and the setpoint need, instead of slamming every element on. Steadier temperature, and no wasted amps on a summer afternoon.
Warm tap water: where it comes in around 62 °F (much of the South), 27 kW gives about 4.3 GPM of 105 °F water on our calculator's maths. That's two 2 GPM showers at once.
A cold January: where it comes in at 42 °F, it's about 2.9 GPM, one 2 GPM shower at a time. Up north, that's the figure to size against, and it's why the honest answer is sometimes a second unit or gas.
What the Garvee 27 kW Electric (240V) listing names:
Breakers and wire gauge are in the installation manual, and it overrides anything above; your electrician reads it first.
At the price on Sep 30, 2026, each kW of stated heating power works out at about $7.15 (price ÷ stated kW, our arithmetic). That puts it in the cheaper third of the 27 whole-house electric tankless heaters we have a price and a stated power for.
The online price is the heater alone. New double-pole breakers, heavy-gauge wire and the electrician's visit are extra, and an older panel may need an upgrade first.
The button opens the exact listing (ASIN B0GZKBBG1N), where today's price, stock and seller apply.
Colder tap water where you live? The WINTEMP WN-36kW Electric, 240V (8.1/10) is rated 36 kW.
Panel short on spare amps? The Rheem 18 kW Electric, 240V (9.3/10) is rated 18 kW, about 75 A at 240 V.
Only one sink far from the heater? The ThermoMate 14 kW Electric, 240V (7.9/10) is a 14 kW point-of-use unit.
Our take
Our favourite thing about the Garvee 27 kW Electric (240V) is 27 kW at 240 V, closely followed by an element that only draws what it needs. Only 4 buyers have rated it so far (4.7/5), so treat the score as an early read. The catch with this Garvee electric tankless heater: no word on the breakers it needs or the flow. We'd pick it if your house has no gas and a 200 A panel with room to spare; otherwise, put it next to the Bosch Tronic 6100 (18 kW) first.
New breakers, the unit on the wall next to the old tank's spot, water in and out. An electrician does the panel side.
Hot in a few seconds once the water in the pipes has passed, and the power steps up and down with the flow (self-modulating, per the listing). Set it, then leave it.
With 42 °F water coming in, 27 kW gives about 2.9 GPM at 105 °F on our calculator's maths. Low-flow shower heads stretch that further.
Clean the inlet screen and flush out scale on hard water. Our flushing and descaling guide has the routine.
Buyers give it 4.7/5, an excellent record, well above our ranked picks' 4.3 average. Only 4 reviews so far, and our formula damps averages built on fewer than 50.
Before you order the Garvee 27 kW Electric (240V), check your panel: 27 kW at 240 V is roughly 113 A, so an electrician should look at the panel first.
Take a photo of the panel label (main breaker size and free slots) and send it to the electrician with the listing. Our electrical requirements guide explains what they will look for.
On our calculator's maths, 27 kW gives about 2.9 GPM with 42 °F winter water and 4.3 GPM with 62 °F water. Our flow-rate calculator does it for your region.
Hardwired 240 V work needs a licensed electrician and often a permit. Our install cost guide shows what usually ends up on the quote.
Hard water still builds up on the elements and the inlet screen. Our flushing and descaling guide covers the routine.
How the Garvee 27 kW Electric (240V) stacks up against the closest alternative, the Bosch Tronic 6100 (18 kW).
| Criterion | Garvee 27 kW Electric, 240V | Bosch Tronic 6100, 18 kW |
|---|---|---|
| Our rating | 6.3/10 | 6.5/10 |
| Heating power | 27 kW | 18 kW |
| Voltage | 240 V | Not stated |
| Self-modulating | Stated | Not stated |
| Buyer reviews | 4 · 4.7/5 | None captured |
Pick the Bosch Tronic 6100 (18 kW) if you want our higher-rated option (6.5/10); stay with the Garvee 27 kW Electric (240V) for more power (27 kW) and self-modulating power.
We rate it 6.3/10 (fair). The rating comes from its documented listing alone, as no customer-review record is captured yet.
The listing states a heating power of 27 kW on 240 V. The headline flow is a mild-weather number: with cold winter water coming in, the same unit gives you less. Read the maker's flow chart at your winter rise, or let our flow-rate calculator do the sums.
The listing states 240 V and 27 kW. At 240 V, that is roughly 113 A. A licensed electrician checks the panel, the breakers and the wiring before it goes on the wall.
Its listing states 27 kW of heating power and self-modulating power. These are the seller's figures, not our measurements: how steady the temperature is in your shower and how it copes with your winter water can't be read from a listing.
Your panel: take a photo of the panel label (main breaker size and free slots) and send it to the electrician with the listing. Our electrical requirements guide explains what they will look for. Your winter flow: on our calculator's maths, 27 kW gives about 2.9 GPM with 42 °F winter water and 4.3 GPM with 62 °F water. Our flow-rate calculator does it for your region. The install: hardwired 240 V work needs a licensed electrician and often a permit. Our install cost guide shows what usually ends up on the quote. Scale: hard water still builds up on the elements and the inlet screen. Our flushing and descaling guide covers the routine.
We link to the exact listing on Amazon, where today's price, stock and seller apply. It is an affiliate link, and it has no effect on the rating.
No, we haven't used it ourselves. Everything on this page comes from its listing and 4 buyer reviews, read line by line and weighed with our published formula.