Solar and a 12V compressor fridge pair well. The fridge uses a modest, steady amount of energy every day, and a panel replaces it every sunny day. The question is how many watts of panel you need to put back what your ICECO uses in 24 hours. Below is the math for 11 ICECO models with a published consumption figure, plus how to choose between portable and roof panels and how to size the charge controller.
The formula
Solar watts needed = daily Wh ÷ (peak sun hours × 0.75)
- Daily Wh comes from ICECO's own 24-hour consumption table in its user manuals (the most complete version is in the manual on ICECO's GOPACK12 page). The VL Pro numbers match the yearly kWh on the FTC EnergyGuide labels ICECO posts. ICECO calls these laboratory figures.
- Peak sun hours is the number of hours of full-strength sun a location gets in a day. We show 4 and 5 hours, a common planning range for spring-to-fall camping in much of the US. Winter, northern latitudes and cloudy weeks can be lower.
- 0.75 is a system-efficiency allowance. Panels rarely make their rated output because of heat, dust and imperfect angles, and the controller, wiring and battery charging all lose a little more.
Worked example, ICECO VL45ProS: 0.510 kWh/24h = 510 Wh a day. At 5 sun hours: 510 ÷ (5 × 0.75) = 136 W. At 4 sun hours: 510 ÷ (4 × 0.75) = 170 W.
Solar watts per ICECO model
| ICECO model | ICECO kWh/24h | Daily Wh | Solar at 5 sun hours | Solar at 4 sun hours | Sensible panel size |
|---|---|---|---|---|---|
| IPT20 | 0.266 | 266 | 71 W | 89 W | 100 W |
| APL20 | 0.293 | 293 | 78 W | 98 W | 100–150 W |
| APL55 | 0.326 | 326 | 87 W | 109 W | 150–200 W |
| APL35 | 0.381 | 381 | 102 W | 127 W | 150–200 W |
| VL35ProS | 0.430 | 430 | 115 W | 143 W | 200 W |
| GOPACK12 | 0.488 | 488 | 130 W | 163 W | 200 W |
| VL45ProS | 0.510 | 510 | 136 W | 170 W | 200 W |
| VL45PLUS | 0.542 | 542 | 145 W | 181 W | 200–300 W |
| VL60ProS | 0.548 | 548 | 146 W | 183 W | 200–300 W |
| VL75ProD | 0.636 | 636 | 170 W | 212 W | 300 W |
| VL90ProD | 0.658 | 658 | 175 W | 219 W | 300 W |
The "sensible panel size" column rounds up to common panel sizes and leaves room for hot days. ICECO's product pages quote Max mode holding 0°F figures 27–40% above its lab table for the VL45ProS and VL75ProD. If you run a freezer in the heat, size toward the top of the range. ICECO's table doesn't list the VL45ProD, BF65, BF86 or the Jeep edition APL35, so they aren't in the table.
You still need a battery
A panel only makes power in daylight, and the fridge runs all night. Solar refills the battery during the day, and the battery carries the fridge until the sun comes back. It also carries you through a cloudy day or two. For most ICECO models, a 100Ah LiFePO4 battery plus the panel size above is a balanced setup. Our guide to how long a battery runs an ICECO fridge has the runtime numbers. The RV solar and battery calculator sizes both together once you add your other RV loads.
Portable panels vs roof panels
Portable (folding) panels
You can park in the shade, run a cable, and set the panel in full sun aimed at it. That often recovers more energy per watt than a flat roof panel. Portable panels are the natural match for a power station. Our Jackery SolarSaga 100 Prime and BLUETTI 200W PV200 plug into those brands' stations. The trade-offs: you set them up and pack them away each time, and they don't charge while you drive.
Roof-mounted panels
Roof panels are always connected, so they charge while you drive and while you're away from camp. They need a mount, a roof entry and a charge controller, and a flat roof panel loses output when the sun is low. Rigid panels like the Renogy 100W/175W/200W N-Type suit a camper or trailer roof. Flexible panels like the Renogy Flex ShadowFlux 100W/200W suit curved roofs and low-profile installs. Many people end up with both: a roof panel for the baseline and a portable panel for long stays parked in shade.
Choosing a charge controller
A roof panel wired to a 12V battery needs a charge controller. An MPPT controller gets more from the panel than a PWM controller, especially in cold weather or when the panel voltage is well above the battery's. Victron's official datasheets list a nominal PV power for each SmartSolar model at 12V:
- SmartSolar MPPT 75/15: 220 W at 12V
- SmartSolar MPPT 100/20: 290 W at 12V
- SmartSolar MPPT 100/30: 440 W at 12V
- SmartSolar MPPT 100/50: 700 W at 12V
A 100–200 W fridge array sits comfortably on a 75/15 or 100/20 (Victron SmartSolar MPPT 75/15–100/20). If you plan to grow toward 300–400 W to cover lights, fans and electronics too, step up to a 100/30. Go to a 100/50 for up to about 700 W (Victron SmartSolar MPPT 100/30 & 100/50). On a 12V system, 700 W is the most PV power a single 100/50 will use (Victron says the controller limits input power if more is connected), which is why our calculator caps its suggestions there. Also check the panels' open-circuit voltage against the controller's first number (75 V or 100 V), especially for cold mornings and panels wired in series. The Renogy Rover Li MPPT is another option if your system is Renogy.
If you charge a power station instead of a fixed battery, you don't need a separate controller. The station has its own solar input, so match the panel to its input limits. Our best power station for an ICECO fridge guide covers that side.
Real-world factors
- Shade is the biggest loss. Even partial shade on one cell can cut a panel's output sharply.
- Heat lowers panel output and raises fridge use at the same time. Size for summer if that's when you travel.
- Setpoint, door openings and warm loads all raise daily Wh. Pre-chilling food and drinks at home helps.
- Winter sun can fall well below 4 peak sun hours. A larger panel or a DC-DC charger fills the gap.
For panel types and mounting in more depth, see our RV solar panel buying guide. Shopping for the fridge? Start at the ICECO collection or the ICECO fridge setup bundles.
FAQ
Will a 100W solar panel run an ICECO fridge?
For the smallest models, often yes. By ICECO's lab figures, the IPT20 needs about 71–89 W and the APL20 about 78–98 W at 4–5 sun hours. A 100 W panel is borderline for the APL55 and APL35 (about 87–127 W), and too small for the GOPACK12, VL45ProS and larger in average sun.
How much solar for a VL75ProD or VL90ProD?
About 170–220 W by the math, so plan on around 300 W to leave headroom for heat and cloudy days, plus a battery to carry the fridge overnight.
Can I connect a solar panel straight to the fridge?
No. Panel output swings with the sun, and the fridge would stop at night. Connect the panel to a battery through a charge controller, or to a power station's solar input, and run the fridge from the battery.
Do I need an MPPT controller?
For a roof panel feeding a 12V battery, an MPPT controller sized to the array is the usual choice. Victron's datasheets list 220 W (75/15), 290 W (100/20), 440 W (100/30) and 700 W (100/50) nominal PV at 12V.