Quick Answer (For the Skimmers)
OutEquipPro builds two 12V rooftop RV air conditioners, and they use different heating technologies with different limits — so picking the right one matters.
- Summit 2 AC includes a 4,500 BTU PTC heater (electric resistance). It's supplementary warmth — great for mild temperatures and small spaces, but not a primary heat source for cold weather or large rigs.
- Glacier Pro AC uses a reverse-cycle heat pump. It delivers high-efficiency heating above 36°F, with efficiency dropping as the temperature falls and no heat produced below 36°F.
If you camp in mild shoulder weather and want a backup to take the chill off, Summit 2 with PTC is the simpler answer. If you want efficient, battery-friendly heating for the broadest possible range of three-season camping, Glacier Pro with the heat pump is the right unit — as long as you respect the 36°F floor.
This guide walks through both, the technologies behind them, and exactly when each one wins.
Why Heating Matters on a 12V RV AC in 2026
For most of the last decade, RV climate control was a two-appliance problem: a 120V rooftop air conditioner for summer, and a propane furnace for everything else. That setup works — but it forces you to carry two systems, two failure points, and two fuels.
The shift to 12V DC rooftop air conditioners (driven by lithium battery costs falling roughly 80% over the past decade and the spread of variable-speed DC compressor technology) created the option to consolidate. OutEquipPro builds two ways to do that:
- Summit 2 AC adds a PTC electric heating element inline with the airflow.
- Glacier Pro AC uses a reverse-cycle heat pump that runs the AC's refrigeration loop backwards.
Same goal — one rooftop unit, year-round comfort — but the underlying physics is different, and so are the temperature and efficiency limits.
The Two Technologies, Honestly Explained
PTC Heater (Summit 2 AC)
PTC stands for Positive Temperature Coefficient. It's an electric resistance heating element whose resistance increases as it warms up, which gives it a built-in self-regulating safety profile.
In practical terms: it converts electricity to heat at a flat 1:1 ratio. Every watt of power you feed it produces one watt of heat. It's reliable, simple, has no moving parts, and warms up almost instantly.
The limit: Because it's a resistance heater, there's no efficiency multiplier. A 4,500 BTU PTC heater consumes about 600 watts of electrical power to produce 4,500 BTU of heat. On a 12V system, that's a sustained ~50A draw — significantly higher than the heat pump alternative.
OutEquipPro is explicit about how to use it: the 4,500 BTU PTC heater on Summit 2 provides supplementary warmth, ideal for mild temperatures and small spaces, and is not suitable as a primary heat source in very cold weather or large spaces.
Reverse-Cycle Heat Pump (Glacier Pro AC)
A heat pump is essentially an air conditioner that can run in reverse.
In cooling mode, refrigerant absorbs heat from inside the RV and dumps it outside. In heating mode, a reversing valve flips the refrigerant flow — the outdoor coil now absorbs heat from outside air, and the indoor coil releases that heat into the cabin. Even cold outside air contains usable thermal energy. The heat pump's job is to concentrate it.
The efficiency advantage: Because the heat pump moves heat rather than generating it, it puts out roughly 2–3 watts of heat per watt of electricity consumed. That's the COP (Coefficient of Performance) advantage and it's why heat pumps have taken over residential HVAC over the past decade.
The limit, honestly stated: Glacier Pro's heat pump delivers high-efficiency heating above 36°F. As outdoor temperatures fall toward 36°F, efficiency decreases. Below 36°F, no heat is produced. That's a hard floor, not a soft taper.
This isn't a flaw — it's physics. Every heat pump has a temperature floor. Honest manufacturers tell you what theirs is.
Which Model Is Right For You?
| Use Case | Recommended Model | Why |
|---|---|---|
| Three-season RVer, want best heating efficiency | Glacier Pro | Heat pump = 2–3× efficiency, longer battery runtime |
| Camp mostly in summer, occasionally need to take the chill off | Summit 2 | PTC is simpler, instant warmth, lower upfront cost |
| Van or small Class B, mild climates | Either — depends on budget | Summit 2 is the value pick; Glacier Pro pays back in battery efficiency over time |
| Large Class A or fifth wheel, cold weather | Neither alone — pair with furnace | 4,500 BTU is supplementary; you need furnace-class output for large rigs in cold weather |
| Boondocker prioritizing battery life | Glacier Pro | Heat pump's COP makes battery-only heating viable; PTC drains batteries fast |
| Fall/spring camping above 40°F | Glacier Pro | This is exactly the temperature band where heat pump efficiency peaks |
| Mostly above-freezing winter camping (snowbird) | Glacier Pro | Until you hit 36°F outdoor, heat pump efficiency is on your side |
| Genuine winter camping below freezing | Either + supplemental heater | Add a diesel air heater or keep a propane furnace as primary |
Effective Temperature Ranges: Where Each Unit Wins and Where It Needs Help
Summit 2 AC with PTC Heater
PTC heating output stays constant regardless of outdoor temperature — that's both its strength and its weakness.
- Mild conditions (45–60°F outdoor): Works well in small spaces. Will hold a van or compact trailer at a comfortable interior temp.
- Cool conditions (35–45°F outdoor): Still works, but you're now leaning on it heavily. Battery draw is substantial.
- Cold conditions (below 35°F outdoor): It will run, but at ~50A continuous draw, even a large lithium bank will be taxed over time. Not a primary heat strategy.
- Large spaces: Not appropriate as the only heat source. The 4,500 BTU output is sized for supplementary heating in small-to-moderate cabins.
Use Summit 2 PTC when: You want simple, reliable warmth in a small space during mild weather, and you're not trying to replace your furnace.
Glacier Pro AC with Heat Pump
Heat pump output is highest when outdoor temperatures are highest (more ambient heat available to extract).
- Above 50°F outdoor: Peak efficiency. Heat pump delivers full rated output at the lowest power draw.
- 40–50°F outdoor: Still highly efficient. Ideal three-season operating zone.
- 36–40°F outdoor: Efficiency decreases progressively. Output is reduced; battery draw per delivered BTU increases.
- Below 36°F outdoor: No heat produced. This is a hard limit.
Use Glacier Pro heat pump when: You camp predominantly above 36°F and want one appliance that handles both cooling and heating with battery-friendly efficiency.
Three-Way Comparison: Heat Pump vs. PTC vs. Propane Furnace
This is the comparison every RVer needs, and one almost no manufacturer publishes honestly.
| Feature | Glacier Pro Heat Pump | Summit 2 PTC | Propane Furnace |
|---|---|---|---|
| Heating BTU | 8500 | 4,500 | 8,000–20,000 |
| Fuel source | Battery / Solar | Battery / Solar | Propane |
| Efficiency (COP) | ~2–3× (moves heat) | 1.0 (resistance) | n/a (combustion) |
| Approximate cost per hour (solar-charged) | $0.05–0.10 | $0.15–0.25 | $0.30–0.60 |
| Effective temperature floor | 36°F (hard limit) | Works at any temp but draws hard | Sub-zero |
| Install complexity | Single rooftop unit | Single rooftop unit | Vent + gas line |
| CO risk | None | None | Yes (requires venting) |
| Also provides cooling | Yes (11,500 BTU) | Yes (10,000 BTU) | No |
| Solar compatible | Yes | Yes (but heavy draw) | No |
| Best for | Three-season, 36°F+ camping | Mild-weather supplementary heat | Sub-freezing / cold-weather full-timers |
The honest summary:
- Glacier Pro heat pump is the most efficient single appliance for above-36°F camping.
- Summit 2 PTC is the simplest, lowest-upfront-cost option for mild-weather supplementary warmth — but it's not a furnace replacement.
- Propane furnace still wins for sub-freezing weather and large rigs. Keep one if you camp seriously cold.
Battery and Solar Planning for Each Heating Mode
If you're already sizing for cooling, your battery bank is more than ready for the heat pump. PTC heating is a heavier load.
Glacier Pro Heat Pump (Estimated Battery Runtime)
Featuring Variable Speed DC technology, the Glacier Pro intelligently modulates power consumption based on real-time cooling or heating demands. Unlike traditional fixed-speed units, our system avoids constant on/off cycling, significantly extending battery runtime while maintaining a consistent interior temperature.
| Battery Bank (Lithium, usable Ah) | Cooling Runtime | Heat Pump Heating Runtime (above 36°F) |
|---|---|---|
| 230Ah | ~5 – 6.5 hours | ~6 – 7.5 hours |
| 300Ah | ~6.5 – 8.5 hours | ~8 – 10 hours |
| 400Ah | ~9 – 11.5 hours | ~10.5 – 13 hours |
| 460Ah | ~10.5 – 13 hours | ~12.5 – 15 hours |
| 630Ah | ~14.5 – 18 hours | ~17 – 21 hours |
Summit 2 PTC Heater (Estimated Battery Runtime)
PTC pulls roughly 50A continuous.
| Battery Bank (Lithium, usable Ah) | PTC Heating Runtime |
|---|---|
| 230Ah | ~4-5 hours |
| 300Ah | ~6 hours |
| 400Ah | ~8 hours |
| 460Ah | ~9-10 hours |
| 630Ah | ~12-13 hours |
Takeaway: If you plan to use heating off-grid for more than a few hours, the math strongly favors Glacier Pro. PTC is a "take the chill off for a couple hours" tool, not an overnight heating solution.
For battery sizing detail, see the companion guide: How Much Battery Do You Need to Run a 12V RV Air Conditioner All Day?
Recommended Builds
Three-Season Off-Grid Build (Best Value: Glacier Pro)
For comfortable camping March–November without a generator or propane:
- AC unit: Glacier Pro 12V rooftop AC with reverse-cycle heat pump
- Battery bank: OutEquipPro Smart LiFePO4 ZM Series, 460Ah or 630Ah with Bluetooth monitoring and Power Hub distribution
- Solar: 400–600W rooftop with MPPT charge controller
- Wiring: #6 AWG between battery and AC unit; pre-installed 100A fuse on positive lead
- Backup heat: None needed above 36°F; add a small diesel air heater for below-freezing nights
Mild-Weather Weekender Build (Best Simplicity: Summit 2)
For weekend trips, summer-dominant use, and occasional shoulder weather:
- AC unit: Summit 2 12V rooftop AC with PTC heater
- Battery bank: OutEquipPro Smart LiFePO4 ZM Series, 230Ah or 460Ah
- Solar: 200–400W rooftop with MPPT
- Use PTC sparingly: Run for short heat-up cycles, not overnight
When to Add a Backup Heat Source
Even Glacier Pro's heat pump is not a winter furnace. Add supplemental heating if any of the following apply:
- You camp below 36°F regularly. Glacier Pro's heat pump produces no heat below this temperature. A 5 kW diesel air heater is the standard companion.
- You have a large Class A or fifth wheel. Both 4,500 BTU (PTC) and Glacier Pro's heat pump output are sized for vans, Class B/C, and compact travel trailers. For 30'+ rigs in cold weather, keep your propane furnace.
- You want redundancy. Two heat sources is the rule for serious winter RVers — if your batteries get cold-soaked overnight, your heat pump output drops; a diesel or propane heater isn't battery-dependent.
The good news: with Glacier Pro handling 8+ months of the year on solar, a backup heater's propane bottle or diesel tank lasts seasons instead of weeks.
Real-World Use Cases
- Spring desert camping (Joshua Tree, Sedona, Moab — March/April) Daytime highs in the 80s, nighttime lows in the 40s. Glacier Pro cools through midday and runs the heat pump in early morning at peak efficiency. No propane needed. Summit 2 with PTC would also work but pulls batteries down faster.
- Fall mountain camping (Colorado, Utah, Pacific Northwest — September/October) Daytime mild, nighttime drops into the 30s–40s. Glacier Pro recommended — the heat pump operates efficiently most of the night, and is right at its 36°F floor in the early morning when you can switch on solar-replenished heating.
- Mild winter snowbird (Florida, Arizona, Southern California — December/January) Highs 65–75°F, lows 45–55°F. Glacier Pro handles the entire heating load easily. Propane bottles last all season just for cooking.
- Weekend summer camping with occasional cool nights (Northeast / Midwest) Summit 2 PTC is the right value pick. Cooling does the heavy lifting; PTC handles the rare 50°F night without overcomplication.
- Sub-freezing winter camping (Wyoming, Montana, high elevation) Neither AC's heating function is sufficient as the primary. Run a diesel heater or propane furnace as primary. Either AC handles summer cooling.
Maintenance Notes
Both units share most maintenance. Heat pump and PTC each have specific items.
- Monthly during heavy use: Clean or rinse the air filter. A clogged filter is the #1 cause of reduced output in cooling, PTC heating, or heat pump heating.
- Quarterly: Inspect the rooftop gasket and seal. Look for UV degradation, especially after summer.
- Annually: Vacuum the outdoor coil. Insect debris, pollen, and dust hurt cooling output and heat pump heating output specifically.
- End-of-season (Glacier Pro): Run the unit in heat pump mode for 5 minutes even if you don't need heat — this exercises the reversing valve and prevents seal stickiness over winter.
- End-of-season (Summit 2): Run the PTC heater briefly to verify operation; no internal valve maintenance required.
How OutEquipPro Compares to the Competition
As of 2026, the 12V DC rooftop heating segment is barely contested.
- Dometic RTX 2000: Cooling only. No heating.
- Nomadic Cooling X2: Cooling only.
- Countrymod 11K BTU: Cooling only.
- Furrion Chill HE: Some 120V models offer resistance heat strips (similar idea to Summit 2's PTC, but on 120V).
- Zero Breeze Mark 3: Portable, cooling only.
- OutEquipPro Summit 2: 10,000 BTU cooling + 4,500 BTU PTC heater.
- OutEquipPro Glacier Pro: 11,500 BTU cooling + reverse-cycle heat pump (above 36°F).
OutEquipPro is one of the few mainstream brands offering integrated heating in a 12V DC rooftop unit at all, and the only one offering a true reverse-cycle heat pump in this form factor.
Frequently Asked Questions
Q: What's the difference between Summit 2 and Glacier Pro?
A: While both are premium 12V rooftop units, they offer different performance levels. Summit 2 provides 10,000 BTU of cooling and features a 4,500 BTU PTC heater for supplementary warmth. Glacier Pro is our high-performance model, delivering 11,500 BTU of cooling and a powerful 8,500 BTU reverse-cycle heat pump. The Glacier Pro is more battery-efficient and provides stronger heating above 36°F, while the Summit 2 offers a simpler, more cost-effective solution for moderate cooling needs.
Q: Does the OutEquipPro 12V RV air conditioner include a heat pump?
A: Glacier Pro does — it uses a reverse-cycle heat pump for high-efficiency heating above 36°F. Summit 2 includes a 4,500 BTU PTC heater instead, which is electric resistance heat (not a heat pump). Choose Glacier Pro if you want true heat pump efficiency.
Q: How cold can the Glacier Pro heat pump operate in?
A: The heat pump delivers high-efficiency heating above 36°F. As outdoor temperatures fall toward 36°F, efficiency progressively decreases. Below 36°F, the heat pump does not produce heat — this is a hard temperature floor. For colder weather, pair Glacier Pro with a supplemental diesel or propane heater.
Q: Can the Summit 2 PTC heater replace my RV's propane furnace?
A: No. The 4,500 BTU PTC heater is supplementary — it's designed to provide warmth in mild temperatures and small spaces. It is not suitable as a primary heat source in very cold weather or large RVs. For full furnace replacement in cold conditions, keep a propane furnace or add a diesel air heater.
Q: How does a 12V heat pump compare to a propane furnace?
A: Glacier Pro's heat pump runs on battery and solar, has no combustion or CO risk, and costs roughly 80% less per hour to operate when powered from solar. Propane delivers more raw BTU (8,000–20,000) and works in sub-freezing weather, but costs $0.30–0.60/hour and requires venting. Above 36°F, a heat pump is dramatically more efficient. Below 36°F, propane wins by default.
The Bottom Line
For three-season RVers and van lifers who want to escape propane dependency without giving up cold-morning comfort, OutEquipPro's two models cover the spectrum honestly:
- Glacier Pro AC with the reverse-cycle heat pump is the right choice for efficient, battery-friendly heating above 36°F — the broadest possible three-season window. It pairs naturally with the Smart LiFePO4 ZM Series battery (460Ah or 630Ah) and 400–600W of solar.
- Summit 2 AC with the 4,500 BTU PTC heater is the right choice for simple supplementary warmth in mild weather and small spaces, where you want the lower upfront cost and aren't trying to replace a furnace.
Both are designed for 12V DC operation native — no inverter required. Choose the heating technology that matches how cold you camp and how much you depend on batteries.
Shop the OutEquipPro Glacier Pro (Heat Pump) →
Shop the OutEquipPro Summit 2 (PTC Heater) →
Related Reading
-
How to Size Your Solar System to Run a 12V RV Air Conditioner
- Spring RV AC Installation Guide: Everything You Need to Know
