Can photovoltaic panels run a heatpump?


The latter has actually acquired appeal in current times, with lots of house owners searching for

alternative family heating approaches

in the kind of

geothermal or air-source heatpump. In this short article, we take a closer take a look at heatpump, their energy use, and the variety of panels you require to power one. Foreword Climatebiz professionals style, research study, fact-check & & modify all work carefully.

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Can photovoltaic panels run a heatpump? Heatpump and photovoltaic panels– 2 sustainable options for house convenience and power generation.

The latter kind part of modular photovoltaic (PV) systems, varying from a couple of watts to countless kilowatts.

Naturally, an industrial planetary system with a power output varying in the thousands can quickly power a single heatpump, however that’s not what we’re going over here.

You wish to know whether a property solar selection can power a heatpump.

Undoubtedly, photovoltaic panels can run a heatpump, even the most effective ones on the marketplace

What identifies this, however, is the size and variety of panels you have readily available to you.

Now, let’s take a look at this in higher information by examining how a heatpump works and how a photovoltaic panel produces electrical energy. What is a heatpump? Heatpump are the future of

a/c systems

(Heating, Ventilation, A/c). They are reversible systems that can cool or warm your house.

A heatpump is merely a heat exchanger in between the interior of your home and the air exterior. It works like a fridge, with a compressor and a cooling/heating fluid. Working concept of an air-heat pump.

Source: University of Waikato Heatpump are more effective than conventional a/c systems as they do not produce heat. Rather, they “move” heat through their exchanger system.

Working principle of an air-heat pump — can solar panels run a heat pump?
That stated,
they still need electrical energy

( 800W to 5,000 W) to cool or heat up a house effectively.

What is a photovoltaic panel? A photovoltaic panel

is a power generator that transforms sunshine into electrical energy. You’ll discover photovoltaic panels varying from 20W approximately 600W.

You can link each system to develop a planetary system with a much bigger power output– the typical size in the U.S. is 6kW.

Nevertheless, a photovoltaic panel’s real power output hardly ever reaches its optimum ranked worth. It differs according to the time of day and the seasons in real-world conditions. For a 6kW planetary system in San Francisco, California, the power output reaches an optimum of 4kW– 5kW (10 am– 2 pm). The solar energy output of a 6kW system in San Francisco, California.

Source: Global solar atlas

The number of watts does a heatpump usage?

The solar power output of a 6kW system in San Francisco, California — can solar panels run a heat pump?
If you’re thinking about purchasing a heatpump, be prepared to discover little or no info on its power requirements.
Fortunate for you, we will supply you with the formula for determining the variety of watts a heatpump utilizes based upon its size and energy effectiveness.

The power usage– in watts– of a heatpump depends upon 2 significant aspects:

Heatpump size


This capability is ranked in

  • British Thermal Systems ( BTU). It differs from 8,000 BTU for the tiniest designs to more than 60,000 BTU for central systems. Energy effectiveness: On your heatpump label, you’ll discover 2 figures:.
  • Seasonal Energy Performance Ranking (SEER). Energy Performance Ranking (EER). The greater those numbers are, the more effective your heatpump and the lower its electrical energy usage.
    • Computing the variety of watts a heatpump utilizes
    • To compute a heatpump’s wattage, you’ll require its heating capability– in BTUs– and its SEER and EER scores.

If the EER score is suggested on your heatpump label, then follow the formula listed below:

Overall Wattage = Capability (In BTUs) ÷ EER

If you just have the SEER score, then you’ll require the following additional estimation action to draw out the EER score:

EER = − 0.02 × SEER ² + 1.12 × SEER

For instance, Comfortmaker’s Coastal heatpump has a cooling capability of 28,000 Btus (2.4 lots), SEER of 15 and EER of 12.5.

Its power usage is: 28,000/ 12.5= 2,240 W

The very same cooling capability with a somewhat less effective system (EER of 11) would lead to a power usage of

2,545 W

That’s a 13% boost that will straight affect your electrical energy expense.

Table We used our formula for various heatpump capabilities with effectiveness scores varying from 16– 22: Heatpump capability

Power @ 16 SEER

Power @ 18 SEER

Power @ 20 SEER Power @ 22 SEER 1 lot ( 12,000 BTU) 938W 877W
833W 802W 1.5 lot ( 18,000 BTU) 1,406 W 1,316 W
1,250 W 1,203 W 2 lot ( 24,000 BTU) 1,875 W 1,754 W
1,667 W 1,604 W 2.5 lot ( 30,000 BTU) 2,344 W 2,193 W
2,083 W 2,005 W 3 lot ( 36,000 BTU) 2,813 W 2,632 W
2,500 W 2,406 W 3.5 lot ( 42,000 BTU) 3,281 W 3,070 W
2,917 W 2,807 W 4 lot ( 48,000 BTU) 3,750 W 3,509 W
3,333 W 3,209 W 4.5 lot ( 54,000 BTU) 4,219 W 3,947 W
3,750 W 3,610 W 5 lot ( 60,000 BTU) 4,688 W 4,386 W
4,167 W 4,011 W The number of photovoltaic panels do you require to run a heatpump? The tiniest heatpump just needs 3 x 500W photovoltaic panels

to run properly. Bigger central systems would require a total 6,000 W planetary system 6,000 W (12 x 500W panels) as a

minimum requirement To compute the variety of photovoltaic panels you require to run a heatpump, you’ll need to collect the following info: Your environment zone. The size of the area you wish to heat.

Your solar electrical energy production capacity

  • Environment zone areas in the U.S.
  • Source: 2012 IECC– International Energy Preservation Code
  • Environment Zone
Climate Zone regions in the US.
BTU/Sq. Feet
Zone 1
30 BTU/sq. feet Zone 2
35 BTU/sq. feet Zone 3
40 BTU/sq. feet Zone 4
45 BTU/sq. feet Zone 5
50 BTU/sq. feet Zone 6
55 BTU/sq. feet Zone 7
60 BTU/sq. feet BTU requirements in various environment zones
Example San Francisco, California, falls under environment Zone 3. You’ll require a heating capability of 40 BTU/sqft. For a 1000 sqft home, you’ll require a heatpump with a heating capability of 40,000 BTU/h.
A 40,000 BTU/h heatpump with a performance score of 20 (SEER) will have roughly

3kW of power.

This heatpump will just perform at complete power a few of the time. Let’s state it’ll run around 6 hours daily, depending upon the outdoors temperature level.

In this situation, it’ll utilize roughly 18kWh each day to warm your home throughout winter season in San Francisco. Determine your solar power capacity

We advise utilizing our

solar calculator

to approximate your solar electrical energy production capacity. You’ll just require your address and the size of your planetary system.

You can use the formula listed below: Variety of photovoltaic panels = Daily heatpump energy requires/ solar power production capacity Throughout San Francisco’s cold weather, you can anticipate to produce 3.45 kWh each day for every single kW of photovoltaic panels. Subsequently, to cover your heatpump’s electrical energy requirements, you’ll require 5.2 kW of photovoltaic panels– 18/ 3.45 = 5.2 kW.

That’s comparable to 11 x 500W photovoltaic panels (5.5 kW).

Keep in mind to our readers: All figures are typical worths. Several external aspects can affect the energy usage of your heatpump– outdoors temperature level, home thermostat temperature level, and so on

Last ideas

Heating and cooling represent around 65% of all domestic energy usage in the U.S. More particularly, area heating is close to 30%.

A heatpump is considered the most effective a/c innovation. It can cut your energy expense by an element of 2– 3.

Heatpump are effective devices, varying from 800W to more than 5,000 W, however like the majority of domestic devices, you can power with photovoltaic panels as long as you have the suitable number readily available.

As a guideline of thumb, a heatpump requires in between 3– 12 500W photovoltaic panels.

Lastly, keep in mind that heatpump energy usage depends upon external aspects such as outdoors temperature level, home temperature level, and time of the year.


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