What Info is Needed to Determine How Much Battery is Needed for RV For 3 Days
Updated 12/08/2025 | Published 11/17/2025
Question:
We have a 2025 KZ Durango 400 w solar 3000 w victron inverter Currently have 2 battle born batteries 100 amp each. It needs to run a GE electric full size residential refrigerator freezer. Suburban gas furnace lighte ect hopefully for 3 days.
asked by: Brett G
Expert Reply:
Hey Brett, are you looking for an upgraded battery setup that can handle the amp draw of your camper?
If so, we need to determine the current draw of all of your accessories for the duration of three days. Can you check your fridge for it's amp draw? The solar will help but we would also need to know how many hours of sunlight its going to get per day as well.
How long do the 2 100 amp hour batteries last?
Product Page this Question was Asked From
Rich Solar Alpha 2 Pro Lithium Battery - Bluetooth - 200 Amp Hour
- Battery
- RV Battery
- 12V
- 20-15/16L x 8-1/8W x 8-1/2T Inch
- 200 Ah
- Lithium Battery
- Rich Solar
more information >
Featured Help Information
Instructions
Continue Researching
- Q&A: What Is The Warranty On Rich Solar Panels, Controllers, And Batteries?
- Q&A: If Bullseye Monitor Dies Can I Still Use Curt RVi 4 Braking System When Flat Towing?
- Article: How Much Solar Power Do I Need For My RV?
- Q&A: Replacement Battery Recommendation for a 2018 Grand Design 295RL
- Article: What Size Generator Do You Need to Run an RV Air Conditioner?
- Article: How to Service An RV Air Conditioner
- Article: How Many Batteries Do You Need to Run RV Air Conditioner?
- Q&A: What Is Included In Rich Solar Kits For RVs?
- Q&A: How Much Power Does the 3.3 cu ft Norcold RV Mini Fridge w/ Freezer Use?
- Q&A: What Needs to Change to Go From Lead Acid to Lithium Trailer Batteries
- Article: 4-Step Guide to Installing RV Solar Power
- Article: Gooseneck to 5th Wheel Adapters
- Q&A: How Many Watt Solar Panel For 100ah Lithium Battery In Jayco Popup Camper?
- Article: Does Solar Panel Type Really Matter?
Jameson C.
12/8/2025
Hey Brett, were you able to find the amp draw on your GE fridge and see how long your two 100 amp hour batteries are lasting? Once you have that info, we can figure out if a larger battery like the Rich Solar Alpha 2 Pro would be a good fit. Let me know what you find—I'm here if you need a hand narrowing it down.