🚌 E350 Travel Hub

Architecture

How the 5 gear items integrate into the E350 power, storage, security, heat, and dust architecture.

Research date: 2026-09-24. Bus: Ford E350 shuttle-bus conversion. House power: 3× ECO-WORTHY Cubix100 48V 100Ah LiFePO4 = 14.4 kWh total, ~11.5 kWh usable @ 80% DoD, 5 kW inverter, 30A shore, solar array TBD. Context: Burning Man/BRC, Saguaro Man, regional burns, RTR, 14 festivals. Playa = alkaline dust, wind, 90-100°F days, cold nights.

Gear: (1) fat-tire e-trike 48V/52V, (2) drone w/ LiPo smart packs (USB-C), (3) RC car w/ LiPo balance charger, (4) LED kite (small/no battery), (5) ~24” low-power TV.

Power Architecture

Bus topology: add a 12V DC rail — the single highest-leverage change

Current bus: 48V DC → 5 kW inverter → 120V AC → everything. Every small DC device pays the double conversion tax (DC→AC at ~85%, then back to DC inside each device’s power supply). For a 48V bank there is a cheaper path: a 48V→12V DC-DC converter feeding a fused 12V DC rail.

  • Recommended: Victron Orion-Tr 48/12-30 (360W) — verified spec: 32-70V in, 12.2V out (adjustable 10-15V), 87% efficiency, no-load <80 mA, remote on/off, short-circuit proof, IP43, ~1.8 kg. (Victron datasheet: https://www.victronenergy.com/upload/documents/Datasheet-Orion-Tr-DC-DC-converters-isolated-100-250-400W-EN.pdf) HIGH confidence.
  • Or the 48/12-20 (240W) if the e-trike’s AC charger is the only thing kept off the rail.
  • The Orion is a converter, not a battery charger — constant voltage output. Safe to power loads with their own charge control (TV, USB-PD chargers, LiPo balance chargers, LED lights). Do NOT use it to charge the e-trike battery directly (see below).
  • Remote on/off terminal: wire to a dash switch or relay so the rail can be killed when leaving the bus (kills parasitic draws AND protects gear from theft).
  • 12V rail loads then bypass the inverter entirely: no 20-50W idle tax, no 15% conversion loss.

Net efficiency comparison for any small DC load (per item below):

Path Bank-side watts for a 25W load Notes
Inverter path (5kW inverter) 25 / 0.85 + idle share ≈ 29W + 20-50W if inverter must be on anyway Inverter idle is the hidden tax (project context: 20-50W idle; HIGH for existence, MEDIUM for exact number per unit)
12V rail path (Orion 48/12) 25 / 0.87 ≈ 29W No idle draw; converter on only when loads active

Rule: anything ≤400W that can run on 12V goes on the Orion rail. The 5 kW inverter is for the 120V-only loads (fridge, e-trike charger). Microwave and coffee maker are not in the plan — cooking/heating uses propane (stove, propane heater); both are dropped from the budget and the microwave/coffee-maker inverter draw is not part of the plan.

Item 1: E-trike (48V/52V pack, 80-150 lb, AC charger)

Path: stock AC charger → inverter → e-trike battery. Do NOT DIY-boost from the 48V bus.

Voltage compatibility: a 48V pack charges to 54.6V; 52V pack charges to 58.8V. A 48V-58.8V boost window is exactly where the DIY market is weakest and the fire risk is highest. Verified pitfalls:

  • Many e-bike/e-trike packs use BMS communication pins — the charger must handshake before charging (documented for Specialized/Bosch-class packs). A generic boost converter cannot. (Escape Forum, eMTB threads — MEDIUM/HIGH)
  • Direct-attach boost converters to Lithium packs with no charge algorithm = you are the charge controller. Endless Sphere + EBIKE Delight both: “anything not listed as a charger means YOU determine the stop-charge point… worst case a bad fire”. DIY court is a fire risk aboard a wood-and-foam bus. Skip it.
  • Purpose-built 48V-bank-input e-trike chargers: essentially nonexistent in 2026 (Victron Orion line is 12/24V outputs; Orion-TR 48/48-6 is a converter, not a charger). LOW confidence any off-the-shelf unit exists per trike brand — verify against your trike’s manual, but plan on inverter charging.

Conversion-loss math (bank-side):

  • Stock trike chargers: 2A ≈ 100W output / ~120W input; 4A ≈ 200W / ~250-280W input; 5A ≈ 260W / ~320W input. Typical: 4A charger, ~250-280W AC input (HIGH, consistent across forums + charger labels).
  • Typical pack: 48V 20-30Ah = 0.96-1.44 kWh, or 52V 20Ah ≈ 1.04 kWh. (MEDIUM — measure the actual pack label; trike spec list from addmotor.com, Aug 2026)
  • Full charge from empty: pack Wh ÷ (charger eff ~85%) ÷ (inverter eff 85%):
    • 48V 20Ah (960Wh): 960 / 0.85 / 0.85 = 1,329 Wh bank draw
    • 52V 20Ah (1,040Wh): 1,439 Wh bank draw
    • 48V 30Ah (1,440Wh): 2,024 Wh bank draw
  • Realistic playa day (ride to ~50-70% DoD, charge back to full): **~700-1,200 Wh bank draw/day =
    • ~37-38% of usable bank for a full-deplete day, ~18-20% for a half-deplete day. This is THE dominant new load — bigger than drone + RC + TV combined. TV combined.

Surge: AC chargers have a modest inrush at plug-in (~1.5-2× steady for a few cycles). At 280W steady, peak ~450-550W — trivial for a 5kW inverter. No concern. Do not stack a second high-draw AC load (propane stove/propane heater load is not on the inverter at all; microwave/coffee maker are not in the plan) during the trike charge window — not because of surge, but because tying up 280W of inverter headroom against the 5kW limit is fine, while stacking eats bank Wh faster than solar can replenish.

Phased charging: one full trike charge per day, scheduled in the solar-peak window (below).

Item 2: Drone (LiPo smart packs, USB-C PD)

Path: DJI 65W car charger on the 12V rail → USB-C PD → battery hub.

  • DJI 65W wall charger: 100-240V AC input, USB-C 65W (PPS/PD). DJI also sells a 65W car charger: 12.7-16V DC input, 65W out — runs directly off the Orion rail. Official DJI spec: https://store.dji.com/product/dji-65w-portable-charger and fern.tech DJI 65W car charger spec. HIGH confidence.
  • The hub (e.g., DJI Neo/Mavic-class two-way hubs) handles BMS comms + sequencing (charges batteries one/two/three at a time depending on charger wattage; ≥45W charges 3 sequentially). HIGH (DJI manual).
  • Wh math (Mini 5 Pro extended pack — adjust to your battery):
    • Pack ~38.3 Wh; 3 packs full = ~115 Wh stored. Hub + charger ~90% efficient → ~128 Wh from the 12V rail. Rail adds Orion loss (÷0.87) → ~147 Wh bank draw for a full 3-pack day. (HIGH math, MEDIUM pack-size assumption)
    • Via the 5kW inverter instead: 115 / 0.85 / 0.85 / 0.9 ≈ same ~184 Wh — so the rail saves ~36 Wh/day AND avoids waking the inverter.
  • USB-C negotiation + PPS means the brick is a smart supply and will not overdrive the pack (mavicpilots verified). HIGH.
  • ~1.3% of usable bank for a heavy flying day. Negligible.

Item 3: RC car (LiPo packs, balance charger)

Path: hobby balance charger (native 12V input) on the Orion rail.

  • RC balance chargers (SkyRC, ISDT, HOTA class) take 12V DC input natively and contain the full charge algorithm + balance function + LiPo mode. This is exactly the “device with its own charge control” the Orion rail is safe for. HIGH confidence this class of charger works on 12V rail; MEDIUM on your specific model’s input spec — check label before wiring.
  • LiPo packs (RC): high-C pouch cells — the highest fire-risk item in this whole list (thin foil pouch, burst-power design; DroneTrader LiPo guide 2026). See safety section.
  • Wh math: 6S 5,000 mAh = 22.2V × 5Ah = 111 Wh/pack nominal (~125 Wh charging including losses). Two-packs/day via charger (~90%) + Orion (÷0.87): ~279-300 Wh bank draw/day ≈ 2.4%. (HIGH math, MEDIUM pack-size assumption)
  • Surge: none. Charger max ~100-250W depending on your charge current setting. Keep charge current ≤ 1C.

Item 4: LED kite (small pack or none)

Path: USB charging, whatever’s easiest. This item is a rounding error.

  • LED kites run on internal USB-charged LiPo or reel-mounted lights. Draw at the pack level: ~0.5-2W running. Charge from any USB-A/USB-C port (12V-rail USB converter or phone charger).
  • Wh math: ≤20 Wh/day stored → ≤~25 Wh bank draw. Essentially free (<0.3%). LOW confidence on exact pack size because the kite model is unspecified — measure it. Do not buy a battery-integrated kite for this use case; buy the one that takes a USB power bank.

Item 5: ~24” low-power smart TV (<30W, native DC target)

Path: native 12V/24V DC TV on the Orion rail. Do NOT run this through the 5kW inverter.

  • Verified 24” native-12V options (2026, all <32W, wide-voltage input 9-32V):
    • Sylvox 24” Limo QLED: <32W, DC 9-32V + AC 100-240V dual input, Google TV, ~3.6 kg (https://sylvoxtv.ca/products/24-smart-12v-rv-tv-2026-limo-qled-series-with-dvd-combo)
    • Majestic GTV2400DA 24”: 1.8A @ 12V = 21.6W, 9.5-30V DC input (https://crdoceania.com.au/crdrv/majestic-24-12-volt-smart-led-tv-…)
    • Englaon LED24M80: 30W @ 12V, 10-30V surge protection, 2.7 kg
    • Independent measurement (YouTube, Gear & Gadget, Sept 2025): Sylvox 24” streaming = 20-21W on 12V; same TV via inverter = 35W (inverter overhead ~15W). HIGH confidence on 20-32W range; MEDIUM on your specific set.
  • Why the rail wins for THIS bus (48V system):
    • Via inverter: 21.6W ÷ 0.85 = 25.4W + inverter idle. If the inverter has to be on for TV alone, add 20-50W idle. 2h of TV = 50-100Wh+ wasted on idle alone.
    • Via Orion rail: 21.6W ÷ 0.87 = 24.8W, zero idle waste. 2h = ~50Wh.
    • 3h/day → rail path ~75Wh vs inverter path ~135-225Wh. The rail saves 60-150Wh/day (~1%). Small in absolute terms, but it’s the difference between inverter-on and inverter-off and removes a failure point (forum consensus: 12V native saves ~15% + idle; iRV2 2025-26).
  • Wide-input (9-32V) matters, even on a regulated rail: forum-documented backlight deaths from TVs wired to a charging bus at 14.4V+. The Orion rail holds 12.2V regulated so this specific risk is mitigated — but wide-input sets also tolerate Orion output sag during rail-peak (e.g., while LiPo charging). Buy wide-input. HIGH.
  • Surge: LED TV inrush at power-on ~2× for a second; trivial.
  • Streaming stick (Roku/Fire ~2-4W on USB power) if the 12V set is non-smart — don’t pay the “smart” markup if the set is dumb; a 12V panel + $30 stick + Starlink/cellular hotspot is the standard RV play (iRV2, Forest River forums consensus).

Phased charging & load sequencing plan

One charge lane at a time, big charges in the solar window:

Order Item When Channel Peak bank draw
1 E-trike 9:00-14:00 (solar peak, one charge/day) Inverter + AC charger ~280W
2 Drone packs 14:00-17:00 Rail + USB-C PD car charger ~65-75W
3 RC packs 17:00-19:00 (after e-trike done) Rail + balance charger ~100-250W
4 LED kite anytime USB ~5W
5 TV evening (inverter stays OFF) Rail ~25W

Rules:

  • Never run e-trike charge + a second high-draw AC load simultaneously — not a breaker limit, a bank-solar math limit: modest AC loads stacked during peak solar eat the recharge margin. Exception: during a DF1100T gen run, the gen’s 8,300W ceiling absorbs trike charge + AC + bank-charge simultaneously — stack freely inside a gen window; otherwise keep to one lane.
  • The rail (Orion 360W) can run TV + drone + RC + kite simultaneously — total ~120-180W, well under its 360W @ 40°C rating. HIGH.
  • All lithium charging is supervised daylight charging — never overnight (safety section).
  • Generator charging: gen → ECO-WORTHY charger → bank → inverter (gen NEVER direct to electronics; THD <15% on the DF1100T). Prefer the midday solar/gen window; never gen after quiet hours or at no-gen venues. See power-supply.md §Generator-Assisted Power.

Update the Power Budget Spreadsheet

Extending the spreadsheet in vehicular/power-supply.md (existing base loads ~2,000-3,000 Wh/day target). Bank-side Wh already includes conversion losses; % of 11.5 kWh usable.

Device Path Stored Wh/day Bank-side Wh/day % of 11.5 kWh Notes
E-trike (48V 20Ah, 50-70% recharge) inverter ~600-900 ~830-1,250 7-11% one full charge = 1,329-1,993 Wh bank; 3-day cloud buffer requires spinning
Drone (3× 77 Wh packs) rail ~230 ~294 2.6% DJI 65W car charger on Orion
RC car (2× 4S 5000mAh) rail ~190 ~245 2.1% balance charger, ≤1C
LED kite USB ~15 ~20 0.2% rounding error
TV 24” (2h avg) rail ~43 ~50 0.4% 21.6W ÷ 0.87
New gear total   ~1,100-1,400 ~1,440-1,860 12.5-16% vs. pre-gear budget
Existing base (fridge, Starlink, lights, laptop, misc) mixed — 2,000-3,000 17-26% from power-supply.md
Full day total     ~3,500-4,850 30-42%  

Implications:

  • One full e-trike charge + everything else = ~40% of the usable bank. Fine with daily solar; ~2.5 days of no-sun margin at full load.
  • Solar array is TBD (power-supply.md). Playa reference point: an 800W array in 7h sun recovered ~4,900 Wh/day in a documented 2024 burn (sunlightandpower.com) — so ~1,000-1,200W of array covers the new-lifestyle day AND the base loads. Plan solar size against the full ~4,000-5,000 Wh/day, not the old Starlink-only number.
  • If the trike rides every day AND no solar AND no shore: 3+ days of trike charging alone empties the bank. Rule: the trike is the first thing charged, the first thing skipped in a power emergency.

Measure on first trip (30-day tracking, per power-supply.md practice): actual trike pack Wh (label), TV watts (plug meter), inverter idle watts (shunt log). Numbers above are planning estimates.

Storage & Physical Integration

E-trike + generator: pull-behind trailer (RECOMMENDED) vs hitch rack

2026-09 revision — an owned WEN DF1100T (214 lb, 11 kW dual-fuel) joined the stack. That weight + fuel fumes change the storage decision: the trike + generator + fuel should NOT ride on/inside the bus. Recommended path is a pull-behind trailer; the hitch rack remains the fallback for trike-only trips.

Trailer (recommended — enclosed 5×8 single axle, used $1,500–3,000):

  • Carries trike (80–150 lb) + DF1100T (214 lb + ~40 lb fuel) + spares/ramps/gear in one place, all weight off the bus except tongue. Solves the unverified-payload problem for the two heaviest gear items.
  • Enclosed = dust shield + rain + lockable storage (trike covered, per the dust + theft playbook below).
  • Generator runs OUTSIDE the trailer, always — no CO sensor, never run inside an enclosed box (CO + fire + fumes). Store with gas drained/stabilized, vents cracked.
  • Weight math: ~1,600 lb gross loaded (1,200 empty + ~250 trike + ~250 gen/fuel + spares) · tongue ~10–15% = 160–255 lb on the receiver — needs a Class III/IV receiver rated ≥ the tongue. [VERIFY] hitch class/rating stamp; receiver existence CONFIRMED by owner (2026-09). Tow rating on 5.4L E350 cutaway ~7,000–7,400 lb (Ford towing guides; VIN-derated configs possible) — trailer is 1/4 of that. [VERIFY] door-jamb GCWR/tow rating + 7-pin/brake wiring availability.
  • Trailer spin-ups: hitch/coupler/wheel locks + AirTag (security), registration/insurance, home storage when not traveling, ~1–2 mpg hit, narrow event lanes + backing in crowds.
  • Trailer tires on playa: hard-packed fine, soft shoulders sink — keep in bus tracks.

Hitch rack (fallback for trike-only, no gen):

  • 200–220 lb platform class with ramps (Rack N Ride eTrike 220 lb, OutfitR/Emojo 200 lb, HitchRackPro 250 lb) on a 2” Class III/IV receiver; rack self-weight 32–95 lb; trike + rack ~115–245 lb cantilevered — anti-tilt bracket + 2nd hitch bolt mandatory (documented vibration failure mode).
  • Do NOT carry the trike OR generator inside the bus: grease/dust/moving mass + 214 lb of fuel fumes in the living space is dirty, an 80/20 fire/unsecured-mass hazard in a crash, and eats floor you don’t have.

Both cases: remove the trike battery when transporting/at camp (temp + security, below). Generator + fuel cans NEVER in the bus.

TV: wall mount

  • VESA 100×100 on a swing-arm or zero-clearance mount, mounting wall must be reinforced (bus wall = sheet + foam insulation; back with plywood/aluminum plate). TV 2.7-3.6 kg — trivial.
  • Route 12V rail power to a fused outlet at the mount. Vibration-rated mount + 4G-vibration- tested TV (Sylvox class) — TV failures from road vibration are documented in RV forums.

Gear bins & charge station

  • Drone + RC + chargers + LiPo packs live in sealed dust-proof bins (Pelican/IK/hard plastic with gasket). Playa dust is alkaline and abrasive; it kills fans, connectors, and LiPo cells. HIGH.
  • Dedicated charge station: a 30×20” aluminum tray or steel ammo can on a non-flammable surface (metal table or directly on the tray). All packs charge inside rated LiPo bags (300-600°C+ containment). The station is the ONLY place charging happens. HIGH (safety sources below).
  • LED kite + spares: one small bin, USB bank.
  • E-trike: 1-2 saddle bags for lock, charger (kept in bus), spare tube, battery key.

Weight vs E350 payload

  • Ford E350 cutaway GVWR range 10,050-12,500 lb; E-450 w/ 6.8L up to 14,500 lb. Max payload (chassis, no body) 7,210-7,376 lb; E-450 8,730-9,040 lb (Ford E-Series spec sheets, 2014-2024). A shuttle-bus body eats 3,000-5,000 lb of that; real remaining payload is likely ~4,000-6,000 lb — but vehicular/weight-capacity.md is EMPTY (GVWR, curb weight, payload all TBD).
  • New gear adds: trike 80-150 + rack 32-95 + TV/mount ~8 + bins/packs ~60 + misc 50 ≈ ~230-360 lb total (hitch-rack case). Trailer case (2026-09): the trike + DF1100T generator move OFF the bus onto a trailer — bus adds only tongue ~160-255 lb + trailer hitch mass, and the ~230-360 lb in-payload load shrinks to ~60-160 lb (TV/mount + bins + misc). Against a 4,000-6,000 lb remaining payload this is ~2-4% — no problem. However:
    • Action: read the door-jamb sticker (GVWR/GAWR) and hit a CAT scale — the bus may already be near limits with water/tools/passenger gear. MEDIUM-HIGH urgency, cheap.
    • Watch rear GAWR: trike on hitch = all weight on the rear axle. Trailer case: only tongue (~160-255 lb) hits the receiver — rear GAWR impact shrinks; still re-weigh with the trailer loaded when doing Phase 0.

Security

Theft profile: e-trike w/ battery $1,500-3,500; DF1100T gen ~$900-1,100; trailer $1,500-3,000; drone $500-1,500 + packs; RC $200-600 + packs; TV $250-400. Playa = open camp culture, but theft at regional burns and BRC has been real since ~2019 and rises with event size. Assume anything visible+unlocked is a target.

E-trike (highest-value, most exposed — lives on the trailer or hitch rack)

  1. Remove the battery every night — it’s 40% of the trike’s value, locks into the frame in 10 seconds, and gets temp-controlled inside (wins for both security AND battery health).
  2. Receiver lock (locking hitch pin) on the rack + anti-tilt bracket.
  3. Chain the frame + BOTH rear wheels to the bus chassis w/ a 12mm+ hardened chain and disc-lock, or a kryptonite-style U-lock through frame + receiver. (sunlightandpower.com playa build: cable bike lock through a transom gasket on the power box — same trick works for the trike.)
  4. Cover the trike when parked at the event (deters casual lift, sheds dust).
  5. AirTag/other tracker in the frame tube. $25 insurance.
  6. At festivals: park the trike so someone must step into the camp to reach it, not adjacent to the public walkway.

Trailer + generator (2026-09 addition)

  1. Hitch/coupler lock + wheel lock + receiver lock — a chained coupler is the #1 trailer-theft defense; the wheel lock defeats dolly theft. AirTag hidden in the trailer frame + inside the gen.
  2. Generator chained inside the trailer at camp and to the trailer frame — a 214 lb gen rolls on wheels, lifts by 2. Chain + disc-lock.
  3. Do NOT chock the trailer with the coupler lock only — also chock a wheel at camp (anti-roll + theft).
  4. Trailer parked at festivals so the rear door faces camp, not the public walkway; doors locked at night.
  5. Gen exhaust/CO: gen runs 20 ft+ downwind of bus + trailer, on the ground, never in the trailer.
  6. Fuel cans secured + ground-strapped when hauling; never inside the bus; never in the trailer with a running gen.

Gear bins & TV

  • Gear bin = a lockable steel/toolbox-style bin in the bus, or the dust bin + a cable lock threaded through the lid handles into the bus frame. Never leave drone/RC visible through windows. HIGH.
  • TV discreet — it mounts inside the bus; fine. If you ever set up a camp kitchen/table outside, don’t place the TV where it’s visible from the road.
  • Drone at the event: tether to a table corner when idle (playa wind + curious kids = drone gone in a gust).
  • Check event/camp norms: people do leave gear out for days at BRC in gated-area camps; your non-gated camp does not get to do that.

Travel days

  • Gear is most vulnerable at gas stations/food stops. All bins + TV inside, trike chained even for a 10-min stop.
  • When sleeping at truck stops: e-trike battery inside, trike chained.

Event-Day Logistics

Dust-proofing (playa: alkaline, wind-driven, gets everywhere)

  • Positive pressure is the highest-leverage playa trick: a 6” grow fan at a window pushing HEPA/truck-filtered air in keeps dust out without taping 20 windows (r/BurningMan, documented school-bus practice every year). Seal obvious gaps (hatches, vents) as backup.
  • Gear strategy: sealed bins + charge-port dust caps on the trike battery (rubber plug / XT60-covers); never charge with open charge ports in wind. HIGH.
  • Orion converter + charger station live in the dust-controlled interior or a vented box; the documented playa power-box build = 57-gal tub, MERV-8 filter intake + USB exhaust fan, transom-gasket cord pass-through (sunlightandpower.com, 2024). Copy it for anything that must run outside.
  • Solar panels: tilt 30° — caked-dust vs nearly-clean photos at 0° vs 10°+ (r/BurningMan) show tilt is the #1 dust defense. Wipe with soft brush + vinegar water morning/evening only (cold water on hot glass = thermal shock). After a dust storm: clean before expecting meaningful recharge. HIGH.
  • Shade structure over/next to the bus drops interior ambient 10-15°F — matters for batteries (below) and comfort.

Charging at the event (the lithium safety section)

Non-negotiable rules, from EV Fire Solutions (2026), NFPA, NSW Fair Trading, Giant/JBI e-bike safety manuals — all say the same thing (HIGH confidence, cited):

  1. Never charge lithium unattended, ever. Never overnight while asleep. Unattended overnight charging is the #1 cause of catastrophic lithium pack fires in RVs and e-mobility (EV Fire Solutions 2026 RV/e-scooter/e-bike fire review; NFPA 1192 2026 lithium task-group findings). In an enclosed RV the vent-gas from a runaway cell can reach ignition threshold before the pack BMS trips (NFPA 1192 Lithium task-group analysis 2026). Unattended = asleep, in the shower, at a gas station bathroom, away from camp — all of it. Unattended = the fire that grows while you’re not there. This is why the whole section below says “one adult awake and within earshot” — not “within sight”, not “nearby”. [VERIFY] EV Fire Solutions 2026 RV-e-mobility fire review + NFPA 1192 2026 lithium task-group if you want the actual incident numbers. overnight charging = “the single highest-risk behaviour in RV travel today” (EV Fire Solutions 2026). In an enclosed RV the vent-gas from a runaway cell can reach ignition threshold before the pack BMS trips (NFPA 1192 Lithium task-group analysis 2026).
  2. Charge only on hard non-flammable surfaces (metal tray/ammo can + LiPo bag), in a ventilated area, out of sun, away from the exit path.
  3. Charge during daylight, one adult awake and within earshot. Unplug at full.
  4. Cool packs before charging — never charge a pack hot from riding/flying (let it sit 30-60 min). HIGH.
  5. Use only manufacturer/stock chargers connected directly — no extension cords, no “compatible” knockoffs (recurring factor in e-bike fires; NYC data via CalBike). HIGH.
  6. Standard dry-powder extinguisher will NOT stop LiPo/e-bike thermal runaway — carry a lithium-rated extinguisher + EV fire blanket; if a pack vents: evacuate everyone, get 30m upwind (toxic HF gas), call 911, do not re-enter. HIGH.

Battery temps in desert heat

  • Enclosed bus in playa sun = 60-65°C+ interior (EV Fire Solutions). Lithium pack survival limits: charge 0-45°C, discharge/run roughly -20 to 60°C, thermal runaway onset ~60°C for generic Li-ion (140°F; thervgeeks, Feb 2026). LiFePO4 (house bank) is far more stable — decomposition ~270°C vs 150-200°C for NMC/LiPo, and LFP releases no free oxygen (multiple 2026 sources, MEDIUM-HIGH — manufacturer-affiliated but corroborated by academic TRP literature).
  • So: the house bank is fine in the bus (airflow + keep out of direct sun).
  • Portable packs (trike/drone/RC/LED) ride INSIDE but not sealed in a hot oven: shade the bus, crack a vent, or store packs in the 57-gal vented tub with fan. Never leave packs in a closed car/bus mid-day. HIGH.
  • Charge times: mid-afternoon playa heat cap = 45°C ambient for charging. Plan trike charge 9:00-13:00 (before the hottest hours) or 18:00-20:00 (after cool-down). This is why the phased plan uses the morning solar window. MEDIUM-HIGH.
  • Storage between events: packs at 40-60% SoC, cool dry place (storage best practice, multiple manufacturer + fire-safety sources; HIGH). Full packs stored in summer heat age fast and swell.
  • LiPo telltales — swollen, leaking, hot, smelly pack: stop charging, isolate outside in a metal can, retire it (DJI + DroneTrader + Giant manual; HIGH).

Standard checks: UL certification

  • Buy with UL standards where possible — e-trike battery/charger: UL 2849 (whole e-bike) or UL 2271 (LEV battery); e-scooter/hoverboard class: UL 2272; charger + battery pairs must match. Certified gear + supervised daylight charging nearly eliminates the fire risk (njbikeped 2024, CalBike 2023; HIGH).

Confidence Summary

Recommendation Confidence Verify before buying  
Add Victron Orion-Tr 48/12-30 (360W) 12V rail HIGH (Victron datasheet, 87% eff) Confirm rail amp budget vs audio/fan loads you add  
E-trike charges via stock AC charger + inverter HIGH (no verified 48V-input DC trike charger exists; DIY boost = fire risk) Check trike manual for BMS comm; confirm pack Wh from label  
E-trike battery NOT charged from the Orion (it’s a converter, not a charger) HIGH —  
Drone: DJI 65W car charger on rail HIGH (official DJI spec) Your drone’s hub wattage (65W class assumed)  
RC: hobby balance charger on rail, ≤1C, LiPo bag HIGH for rail compatibility; MEDIUM for your charger’s input spec Label the charger input (12V DC?)  
  TV: native 12V/24V, 9-32V wide-input, ~21-30W HIGH (Sylvox/Majestic/Englaon + independent 20-21W test) Measure actual watts w/ plug meter; confirm VESA + mount backing
  3h TV on rail saves ~60-150 Wh/day vs inverter HIGH math, MEDIUM for your inverter’s idle Log inverter idle watts once; ~60-150 Wh is real but small vs trike draw
  Phased charging: one big AC charge at a time, morning solar window HIGH (bank math) Solar array size TBD — size for ~4-5 kWh/day including trike if you ride daily
New gear = ~12.5-16% of usable bank/day MEDIUM (trike pack size + ride distance assumed) 30-day wattmeter tracking  
E-trike on 200-220 lb class hitch rack, battery removed nightly HIGH for rack class; MEDIUM for exact trike fit Measure wheelbase/track/tire width; verify receiver class  
Enclosed 5×8 trailer for trike + DF1100T generator (2026-09) HIGH for concept; MEDIUM for exact trailer/hitch fit Hitch class/rating stamp; tongue 160-255 lb; 7-pin/wiring; VIN tow rating  
Gen is bank-charger via ECO-WORTHY charger, never direct to electronics HIGH (THD <15% verified) Confirm ECO-WORTHY charger input accepts non-inverter gen  
Payload fine at ~230-360 lb added (rack) / ~60-160 lb (trailer case) MEDIUM — payload files are EMPTY Door-jamb sticker + CAT scale weigh, with trike/trailer loaded  
Never charge lithium unattended/indoors overnight HIGH (EV Fire Solutions, NFPA, NSW, Giant/JBI, CalBike) Buy LiPo bags, ammo can tray, lithium-rated extinguisher, smoke alarm  
Playa: sealed bins, positive-pressure fan, 30° tilted panels HIGH (multiple burn-season field reports) Build/kit the vented tub before the first burn  
Packs stored at 40-60% SoC, shaded, ventilated HIGH (manufacturer + fire-safety consensus) —  

Unknowns to close (each is one measurement): trike pack Wh + charger input W; inverter idle draw; TV watts; drone hub wattage class; RC pack capacity; bus payload (CAT scale); solar panel count (drives recharge math).

Key sources

  • Victron Orion-Tr 48/12-30 datasheet (87% eff, 32-70V in): victronenergy.com (verified 2026)
  • DJI 65W charger + DJI 65W car charger specs: store.dji.com / DJI PDF (verified 2026)
  • EV Fire Solutions “Caravan & RV Lithium Battery Fire Safety” 2026 (unattended charging = #1 risk; extinguisher/lithium-rated guidance)
  • NFPA 1192 2026 + RVIA Handbook (lithium task-group, enclosed-compartment runaway analysis); NFPA e-bike safety portal
  • NSW Fair Trading lithium-ion safety; UL 2849/2271/2272 via UL e-bike safety action center, njbikeped 2024, CalBike 2023
  • DroneTrader LiPo safety 2026; energyreservoir LiPo charging guidance (NFPA/CPSC citations)
  • JBI / Giant e-bike battery safety manuals (never charge unattended; charge on non-flammable surface; 0-45°C)
  • Ford E-Series cutaway spec sheets 2012-2024 (GVWR 10,050-14,500; payload 7,210-9,040)
  • eTrike hitch rack class (Rack N Ride 220 lb, OutfitR/Emojo 200 lb, HitchRackPro 250 lb; Addmotor trike weights — 86-198 lb)
  • Sylvox/Majestic/Englaon 24” 12V TV specs + independent 20-21W measurement (Sept 2025)
  • iRV2 / Forest River / solar-electric forums — 12V vs inverter TV consensus, phantom loads
  • sunlightandpower.com playa solar build (800W → ~4,900 Wh/day; vented battery tub, lag bolts, panel cleaning); r/BurningMan positive-pressure dust defense + tilted-panel evidence
  • ebikedelight.com, endless-sphere, diysolarforum — e-bike DC charging reality + DIY boost converter fire-risk consensus