Solar-Only System Kit
Design your solar heat pump system for solar-only operation
Design Your Solar Heat Pump System
Get a customized heat pump recommendation and a list of the components required for your project
Solar-Only System FAQ
What is Solar-Only mode?
What is Solar-Only mode?
Solar-Only mode powers the heat pump directly from solar panels, without using grid electricity or batteries. During the day, the system automatically uses available solar energy to provide cooling or heating.
When does a Solar-Only system make sense?
When does a Solar-Only system make sense?
Solar-Only mode is ideal for applications where cooling or heating is primarily needed during the day. It is also the most economical way to benefit from solar-powered heating and cooling.
Does the heat pump work when clouds pass by?
Does the heat pump work when clouds pass by?
Yes. The heat pump automatically adjusts its capacity based on the solar energy available. Temporary cloud cover may reduce performance, but the unit will continue operating as long as sufficient solar power is available.
Does the heat pump operate at night?
Does the heat pump operate at night?
No. In Solar-Only mode, the system operates exclusively from solar energy. Without sunlight, the unit will not run. If you require operation at night, consider a Hybrid Solar + Grid.
Do I need batteries or an inverter?
Do I need batteries or an inverter?
No. Our solar hybrid AC/DC heat pumps connect directly to solar panels, so no batteries or inverter are required. This reduces system cost, complexity, and energy losses while maximizing the value of your solar energy.
How many solar panels do I need in Solar-Only mode?
How many solar panels do I need in Solar-Only mode?
The minimum recommended solar capacity is:
- 12,000 BTU model: 1,400 W of solar panels
- 18,000 BTU model: 1,800 W of solar panels
When designing your solar array, it is important to ensure that the total open-circuit voltage (Voc) of the panels does not exceed the heat pump's maximum input voltage of 350 VDC. Please note that in Solar-Only mode, the unit is powered exclusively by the internal DC bus derived from the solar panels. The MPPT and DC-DC stage are doing all the work, so a more conservative limit (350 VDC) is applied to ensure reliable startup and operation under all conditions.
Since there is no grid backup in Solar-Only mode, a larger solar array is recommended to ensure reliable startup and optimal performance throughout the day.
Can I upgrade later?
Can I upgrade later?
Absolutely. A Solar-Only system can later be upgraded to Hybrid Solar + Grid or even Battery operation if your needs change.
Which electrical protection equipment is required?
Which electrical protection equipment is required?
Proper electrical protection is strongly recommended to ensure a safe and reliable installation. Typical components include DC disconnect switches, DC breakers, fuses, and surge protection devices (SPD) to protect both the heat pump and the solar panels from overcurrent and voltage surges.
What’s included when using the system design tool?
What’s included when using the system design tool?
The system design tool automatically includes the core components required for your selected configuration, including the heat pump, outdoor unit mounting support, refrigerant line set, communication cable, solar panels, rail-less roof mounting hardware, solar cables, DC breaker and surge protection, and an installation diagram to guide installers through the recommended setup and supplied components.
Do you offer installation services?
Do you offer installation services?
We do not perform installations directly, but we work with a network of certified HVAC installers across North America. You can browse our Installer Locator page to find a partner near you or contact us for help to connect you with a qualified installer in your area.
Please note that installation by a certified HVAC technician is mandatory to qualify for the 5-year limited warranty.