Battery calculator pick
Vatrer 12V 300Ah lithium battery
Listed on the Megawatt battery calculator as 3,840 Wh.
Check the current price on Amazon.
Powering adventure
Run the coffee maker on sunshine.
Size your solar, find the right Fleetwood manual, and grab the gear James actually recommends. Free tools, honest numbers, and a few bad camping jokes.
Just looking around? Shop gear or read the guides.
Start here
Pick a trail
Four ways in. Every one ends with a real answer, not a newsletter popup.
Plan my solar
Roof layout, daily watt-hours, battery bank, wire gauge, and three build tiers from Weekend to Off-grid.
Start planningFind my manuals
Bounder, Discovery, Southwind and friends. Official Fleetwood and parts-maker links only.
Open the hubShop gear
The batteries, solar packs, and road gear from the Megawatt calculators. Prices stay on Amazon.
See the kitsRead guides
Lithium or AGM, inverter sizing, boondocking power. Written from manuals and math, not hype.
Start readingFriendly tools, real numbers
How long will my coffee maker run?
Slide in your battery and the watts printed on the appliance. You get hours, not amp-hour homework.
Example values. Your label and your comfort level win.
Your coffee maker runs about
1.1hours
From 1,024 usable Wh, before inverter losses.
15%
Built for quiet hours
The generator can sit this one out.
Quiet hours roll around. The fridge doesn't care. A battery bank sized for your loads, plus enough roof solar to refill it, keeps the cold stuff cold and the neighbors friendly.
Size my battery and solar
The flagship
Your roof, your rig, three ways to build it
The solar planner starts with the coach you actually own and ends with a parts list you can buy.
- 1Pick your rig. Class A, B, C, travel trailer, fifth wheel, toy hauler, van, or truck camper. Fleetwood models come first.
- 2Measure the roof. The planner lays panels out on your real dimensions, around the vents.
- 3List what you run. Fridge, fans, the coffee maker. You get a daily watt-hour budget, battery bank, inverter, controller, and wire size.
- 4Choose a tier. Weekend, Boondocker, or Off-grid, each with Amazon parts links, a cost range, and an honest DIY difficulty.
Fleetwood manual hub
Lost the manual? Same.
Pick your Fleetwood and we send you to the official owner resources, plus the Dometic, Norcold, Onan, Atwood, Suburban, and Lippert pages for the parts inside.
Shop gear
Gear that earns its spot in the bay
Straight from the Megawatt calculators: a Vatrer lithium battery, a solar pack, and the road gear Dr. Megawatt points to on the fuel and wind pages.
Solar calculator pick
400W solar pack
The solar array calculator links this short URL as the 400W pack.
Check the current price on Amazon. Confirm the listing wattage before you buy.
Road gear
TireMinder TPMS
Tire-pressure monitor linked from the fuel savings calculator.
Check the current price on Amazon.
Dr. Megawatt approved
Garmin RV GPS
Dr. Megawatt approved routing tool on the fuel and license pages.
Check the current price on Amazon.
Megawatt Merch
Dress like you know where the dump station is
Our own shop, full of camp humor on tees, hoodies, and doormats. Printed to order on megawattmerch.com.
T-ShirtJust Here for the Hookups$20.00 on Oct 6, see the shop for today's price
HoodieGenerator Whisperer$34.00 on Oct 6, see the shop for today's price
HoodieCertified Mosquito Bait$34.00 on Oct 6, see the shop for today's price
T-ShirtSlide-Out Sunday$20.00 on Oct 6, see the shop for today's price
T-ShirtRoadschool Mama$20.00 on Oct 6, see the shop for today's price
Home DecorHome Is Where You Park It Doormat$50.00 on Oct 6, see the shop for today's price
From the channel
Dr. Megawatt is in
Reviews, warnings, and shop days from the Megawatt YouTube channel. Videos open on YouTube, so this page stays quick.
Guides
Read this before you drill the roof
Short, sourced, and honest about what the manuals do not say.
Boondocking power that lasts the whole trip
The dry-camping habits Fleetwood prints in its owner's manual, plus the battery and solar math behind them.
Read itHow to choose an RV solar kit
Count your watt-hours before you climb the ladder. Here's how the Megawatt math turns a normal day into one of four solar packs.
Read itAdding solar to a Fleetwood, step by step
Get the right owner's manual from Fleetwood, measure the roof, and size the system from your own loads. No made-up roof ratings.
Read itFriends of the fire
Partners from the old site
The same partners megawattrv.com listed. Contacts, not rankings.
CCRV (Cross Country RV Solar)
Solar installs. Ask for Derek Green.
Boogey Lights
LED lighting for RVs.
Wade’s Mobile Detail
Mobile detailing that comes to you.
Pull up a chair.
Got a question about your coach? Email Hello@MegaWattRV.com. Or save your rig once and every calculator remembers it.