ACDC12C Solar Air Conditioner Heat Pump

(6 customer reviews)

The ACDC12C 12,000 BTU solar air conditioner requires no grid connection, no batteries, no inverter, no charge controller – just plug in the solar panels and start saving up to 100% on daytime cooling or heating costs. A grid connection can be added to allow operation at night, and to provide higher daytime capacity & uninterrupted operation during low sunlight. The ACDC12C can heat or cool between 500 and 600 sqft.

Call (864) 915-1855 for questions about installation.

For a larger 18000 BTU unit check out the ACDC18C

For an AC unit compatible with batteries check out the DC48


None (2) 100' PV cables with MC4 connectors +$240.00
None IMO 2 Pole, 16 Amp DC Disconnect +$85.00
None MidNite Solar 300V DC Lightning Arrestor +$130.00


Save Up To 100% on Heating/Cooling Costs!!

Keep the inside cool all day for next to nothing in energy costs. Preventing daytime heat build-up also cuts evening cooling costs. Cool or heat up to 750 Sq. Ft. (69m²).


No AC Power of Grid Connection Required!

ACDC12C Solar Air Conditioner Heat Pump

Click here to download to ACDC12C 12,000 BTU solar AC Manual

The HotSpot engineering team created the world’s first DC solar air conditioner in 2007 and has led the world in solar AC design and quality manufacturing for more than 10 years. The ACDC12C blends solar DC power directly with AC power (optional) to deliver a seamless cooling or heating experience while making the best use of free DC solar power. But unlike previous versions, the ACDC12C does not require an AC backup connection to operate during good sunlight conditions. During the day it can operate on 100% solar power.

ACDC12C Solar Air Conditioner Overview

The ACDC12C solar air conditioner requires no grid connection, no batteries, no inverter, no charge controller – just plug in the solar panels and start saving up to 100% on daytime cooling or heating costs. A grid connection can be added to automatically allow operation at night, as well as to provide higher daytime capacity & uninterrupted operation during cloudy or low sunlight conditions. 

How the ACDC12C Solar Air Conditioner Works

Compatible with all types of solar panels & 50Hz and 60Hz power, use it anywhere in the world.

Solar AC Heating

The system is designed for hybrid operation with solar providing most or all of the energy needed during daylight hours, supplemented by AC power (optional) at night or during times of cloud cover. 

During the day the ACDC12C can run exclusively on solar power with no AC power or grid connection when solar is strong enough. The maximum speed/capacity will be based on the level of available solar power available. If also connected to AC power source, the unit can run at full speed whenever needed, and will add in just enough AC power, if/as needed, while still primarily using available solar DC power.

When connected to both solar and an optional AC power source, the ACDC12C only uses small amounts of power from the utility company, if and as needed. Hybrid operation eliminates the need for batteries and allows use of the system 24 hours per day.

The system primarily uses solar power, and mixes it with normal AC power, if available, at times when solar availability is reduced due to clouds, overcast sky, or at night. If the sun conditions are poor and no AC connection is available, the ACDC12C calculates the amount of solar power available in real time and reduces its speed to match the available solar power. Of course, the unit will not run without an AC connection in very low sunlight conditions, or at night.

The unit can be connected with up to six panels for running on 100% solar power even when the sun is not at full strength

The ACDC12C includes a digital power display so you can get an idea of how much AC and/or DC power is being used in the system.

The ACDC12C Solar Air Conditioner SAVES MONEY

  • Can cool/hear an area with 100% solar energy
  • No batteries required
  • Uses 3-6 solar PV panels
  • Mini-split design
  • SEER 22 rating
  • Ductless System

Your air conditioner needs the most power when the sun is shining, a coincidence you can take advantage of with our ACDC12C solar air conditioner. It can keep an indoor area cool during the day for free, or for just pennies, at times when solar power is not sufficient to carry 100% of the load.

In addition to cooling, the ACDC12C solar heat pump will provide solar powered heating, operating all the way down to an outside ambient temperature of 5 F. No matter how far north or south you are, this is the right system for you. No net metering needed. Single indoor unit.

Use this system to cool a small area or to augment a larger system. Connect three (up to six) solar panels (290-360w per panel) in series. The unit can also connect to 220v (208v-240v) AC power for extra power during overcast conditions, transient clouds, or at night.

No need for batteries. Even when the sun is not shining at all, with an AC connection this ultra high-efficiency (SEER 22 without solar) heat pump will keep you comfortable and save you money using far less electricity than a normal AC or heat pump unit of the same capacity. Calculated using only paid-for energy, the ACDC12C produces an equivalent SEER above SEER 75.

This solar mini-split air conditioner design allows you to put solar cooling into the area where it’s needed the most and avoid the security issues of an unsightly and noisy window unit.

If your location needs heat during the winter, take a full 1-ton of the daytime heating load off of your main heating system for free and get a head start on evening heating requirements.

Since the ACDC12C is a ductless system, it allows 100% of your heating or cooling to be delivered where it’s needed without the loss that occurs in a ducted system.

Note – this is not an “off-grid battery powered” unit, although adding batteries is possible, it is not the recommended use. If you have no AC power and need a 24×7 off grid solar air conditioner, contact us.

Solar Air Conditioning Cooling & Heating Augmentation

Augmenting a space heating or cooling system with solar makes perfect sense. In addition to heating or cooling a small area, it allows you to add capacity to an existing system, or reduce the load on an existing system, either or both of which can save you money and add comfort.

Solar augmentation also allows offsetting of higher daytime electricity rates and reduces the amount of early evening catch-up required by the normal system. The ACDC12C hybrid solar air conditioner allows you to add comfort without adding energy cost, and can sharply cut your daytime heating and cooling bills.

Get up to 100% of your daytime cooling (or heating) free from the sun. Plug-N-Play solar connections make installation simple. Over SEER 22 on normal AC power. Calculated SEER equivalent net of DC power is >SEER 75. Requires min. 4x solar PV panels.


The ACDC12C installs just like a normal mini-split air conditioner, then you connect the solar panels using industry-standard MC4 connectors. You can use 3 or more normal solar panels (recommended 72 cell panels) of 290w-375w each and wired in series. You can order the panels, etc. from us or purchase them locally; note the panels should be minimum 36vmp rated, please review the specifications.

If you use 60 cell panels (30vmp), use a minimum of four 60 cell panels. For off-grid operation during the day with no AC connection, with either type solar panel you may wish to add at least one additional panel.

The ACDC12C is shipped pre-charged with R410a, an ozone-friendly refrigerant and we recommend hiring a professional HVAC installer. If self-installing, you will need a licensed HVAC technician with a vacuum pump to do the final commissioning and to comply with US federal law. The units include a 3M lineset, if a longer one is needed, you may use a standard lineset which can easily and quickly be made onsite by the installer. You can also order various length linesets (1/2″ x 1/4″) from various online sellers such as Home Depot, Amazon, etc.


Product Specifications

Indoor Unit:

Packing   (W*D*H) mm 36.2×14.6×21.3
Gross weight Lb. 16.4

Outdoor Unit:

Packing  (W*D*H) inch 36.2×15.6×23.8
Gross weight lbs. 79.3

Please Note,  PV wire, etc., is not included by default, it must be added on above.



For a larger 18000 BTU unit check out the ACDC18C


ACDC12C: Frequently Asked Questions

  1. What are the different types of solar air conditioners?
    HotSpot offers two types of solar air conditioners, an AC-DC Solar Hybrid Air Conditioner, and an all-DC off-grid/telecom air conditioning unit. There are also other types of solar air conditioners in the market, for a good analysis of the various systems available, see the page called compare solar air conditioners.
  2. How does the ACDC12C air conditioner work?
    The ACDC12C operates like all normal ultra-high-SEER mini-split heat pumps, but accepts solar directly from standard solar panels. When abundant solar energy is available the ACDC12C can operate with only solar panels as a power source. For best operation at full speed, on cloudy days, or to run at night, an optional grid-power AC connection is recommended.
  3. Does it have to be connected to main power?
    No, it can use only power from solar during strong sun hours. An AC power source is recommended for cloudy days or to run at night. The AC source can be supplied by utility power, an inverter, or a sine-wave quality generator.
  4. How much power does it use?
    Because it is a SEER 22 system (certified) it uses very little power. Normal operation consumes about 600 watts of total power.
  5. How difficult is it to install?
    It installs exactly like a normal mini-split air conditioner, then you can simply plug in the solar panels. In the USA a EPP licensed is needed to handle r410a so we recommend you hire a licensed HVAC technician to perform at least the final part of the installation.
  6. Does it need batteries?
    No, the ACDC12C does not need batteries. Any shortage of solar power, such as at night, is made up for by pulling the power from the normal AC power supply.
  7. Is the system certified for safety and performance?
    Yes, the ACDC12C has been fully tested and is listed by ETL/UL 60335
  8. How much does it cost?
    The final installed price will vary based on accessories and installation requirements. 
  9. What is the SHF (Sensible Heat Fraction)?
    This refers to the balance of sensible vs. latent heat removal (dehumidification) in cooling mode.
    Cooling Mode: AVERAGE DATA – Sensible heat(W) 2524.2 Latent heat(W) 705.4
    SHF for heating mode is always 100% sensible.







6 reviews for ACDC12C Solar Air Conditioner Heat Pump

  1. RANCE GOODRICK (verified owner)

    I am a repeat customer and will continue to do business moving forward …

  2. Jim McFarlane (verified owner)

    I totally believe this is the way to go. I have everything ready to fire up as soon as the AC man can come evacuate the line set and fill it with the proper R410a. I would do it myself however to purchase r410a they want you EPA cert. I think everyone in Florida should have one of these , get it asap before someone changes the law and wont let you.

  3. Jim McFarlane (verified owner)

    You did great, the delayed shipping did set me back. Now I’m waiting linset charging. We need a simple solution for charging a 25′ linset.

  4. Nicholas W. (verified owner)

    Very good experience overall with practical peppers. Love the YouTube videos that that corresponds to this install. A few comments on the product itself; pretty straight forward install, though the users manual seems to be a few different ones pasted together (this is where the videos help). This brings up my second small issue. I have it only connected to solar and in the morning when the “power” comes back on it will beep. This will then use enough power to cycle the unit off. This will continue until there is enough light to keep it on full time. I’ve searched the manual and can’t find where to disable the beeping upon startup (or at all times for that matter). Both of these are minor and easily remedied by switching off before sundown and simply messing with the controls to learn about it. Will try to update review once heating season has commenced.

  5. Jason M. (verified owner)

    Works wonderfully

  6. Greg L. (verified owner)

    I have been waiting over a year for Hotspot to send me promised parts to make the readout function correctly, so I guess they are never coming. This is after many calls and texts and they keep promising to send them. The unit does work most of the time but apparently there is a valve inside that sticks when you really need it the most. The instructions leave a lot to be desired, appearing to be put together from several different units. The remote control is also from some other mini split with a Hotspot sticker on it and not all functions on the remote work. I cannot recommend this air conditioner, especially now that there are improved models from other companies on the market.

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