Tankless Water Heater 11kW 240V APOLO-11k - Compact Instant Hot Water

In this review of the APOLO-11k tankless water heater the bottom line is simple: it is a compact, high-output electric unit best suited to small homes, apartments, or point-of-use setups that need instant hot water without a bulky tank. The reviewer found the unit delivers steady hot water at up to 2.6 GPM with an activation flow of 0.4 GPM, and appreciated the Wi-Fi remote control and precise temperature adjustment. Installation requires attention to electrical capacity, but once wired to a proper 50A breaker and 8 AWG wire the unit performed reliably for showers and faucets.

Key Features

• Compact footprint: The 14.2 x 9.5 x 3.5 in size saves wall space and fits easily in closets or utility nooks where a tank would not.
• Instant hot water: Up to 2.6 GPM flow provides continuous hot water for one to two fixtures without the wait or temperature swings common to small storage tanks.
• Precise temperature control: You can set temperature from 86F to 140F in 1F increments with a rotary control for exact comfort and safety.
• Smart operation: Built-in Wi-Fi lets users adjust temperature remotely and monitor operation without being next to the unit.
• Safety protections: ETL certified features include leakage, overheat, and dry-fire protection plus separated heating elements to reduce scale and corrosion.
• Electrical capacity: The unit draws up to 46A and is compatible with a single 50A double-pole breaker and recommended 8 AWG wire for safe, reliable operation.

Who It's For

The APOLO-11k is ideal for renters, small apartments, or homeowners who want a compact point-of-use heater for a shower and a sink or a couple of fixtures. It is especially useful where wall space is limited and instant hot water is preferred over a storage tank.

Prospective buyers who need whole-house hot water for multiple simultaneous showers or who cannot provide a dedicated 50A circuit should look at higher-capacity models. Also, owners who prefer electric systems with simpler, lower-amperage wiring needs may prefer a different product.

Pros & Cons

Pros

• Space-saving dimensions make it easy to mount on walls or inside cabinets in tight spaces.
• Wi-Fi remote control and precise 1F temperature adjustments deliver convenience and comfort.
• Safety features and ETL certification provide reassurance and lower maintenance thanks to separated heating elements.
• Instant hot water at up to 2.6 GPM supports a shower and a sink reliably.

Cons

• Requires a substantial electrical supply (up to 46A) and a dedicated 50A breaker, which may need an electrician for installation.
• Flow rate limits it to 2-3 usage points; it is not designed for larger households needing multiple simultaneous high-flow fixtures.

Specifications

Model	APOLO-11k
Power	11 kW at 240V
Max flow rate	Up to 2.6 GPM
Activation flow	0.4 GPM
Max amperage	46 A
Required breaker & wiring	1 x 50A (double pole) breaker and 8 AWG wire
Water connections	Bottom 1/2' NPT

Our Verdict

The APOLO-11k is a practical, compact tankless electric heater that delivers instant hot water for small residences and point-of-use applications. It offers useful smart controls and solid safety features, making it good value for anyone who can supply the required 50A circuit and needs reliable hot water for one to two fixtures.

Frequently Asked Questions

Can this unit run a shower and dishwasher at the same time?
The APOLO-11k supports about 2.6 GPM, so it can handle one shower and a sink or light dishwasher use, but two full-flow fixtures simultaneously may reduce temperature or flow.

What electrical setup is required?
The heater draws up to 46A and is intended for a single 50A double-pole breaker with 8 AWG wire; professional installation is recommended.

Is the unit protected against scale and dry firing?
Yes, it has separated heating elements to reduce scale and ETL-listed protections for leakage, overheat, and dry-fire conditions.