Sherpa PEAK 3.6 & SunFold 300 & CHARGE 500
The complete mobile off-grid power system — save £578 vs buying separately
Three products that genuinely make sense together: 3,072Wh of LiFePO₄ capacity in the PEAK 3.6, the SunFold 300 for fast solar input when you’re parked, and the CHARGE-500 for high-current alternator charging while you drive. Multi-source charging means you’re never stuck waiting for a single input — sun and engine and mains all combine through the same MPPT. Save approximately £578 vs buying the three units separately.
Why these three together
The PEAK 3.6 alone is a brilliant power station, but its biggest design strength is the multiple charging inputs that can be combined simultaneously. Without solar, you’re stuck on mains-only charging. Without an alternator charger, you’re slow-trickling at 100W from a cigarette socket while you drive. With both, the unit recharges from whatever combination of sources is available — and the bundle pricing makes the complete system meaningfully cheaper than buying piecemeal.
- Parked in the sun: SunFold 300 charges via MPPT — ~1.4 hours empty-to-full at full input
- Driving: CHARGE-500 takes over via the same input port — ~6 hours of driving for a full charge
- Parked in the sun while driving (it happens): both inputs simultaneously — the PEAK 3.6’s power management combines them into a single charging stream
- At home / on a campsite: standard mains via the supplied AC cable — ~1.8 hours empty-to-full
- Power cut: the PEAK 3.6 sits on pass-through with grid power, switches to battery in 8–20ms when the grid drops
Power hub: PEAK 3.6 (3,072Wh / 3,600W)
The flagship of the Sherpa PEAK range. 3,072Wh of automotive-grade LiFePO₄ capacity, a 3,600W pure sine wave inverter capable of running domestic kettles, microwaves, induction hobs and power tools simultaneously, and 15 output ports including 3 UK 3-pin AC sockets, dual USB-C with 100W PD, two wireless charging pads and a 30A XT60 high-current DC output. Bluetooth and Wi-Fi for app-based monitoring. UPS-style backup with 8–20ms switchover. Expandable to 15,360Wh with up to 4 PEAK 3.0-EB extra batteries.
Full PEAK 3.6 specifications and detailed feature breakdown available on its individual product page on our store.
Solar input: SunFold 300 (300W HPBC)
The bigger of the two SunFold panels. 300W peak output from HPBC monocrystalline cells — up to 25% cell efficiency for around 10% more usable power than conventional mono panels, especially in partial sun. IP67 rated, integrated carbon fibre and ETFE polymer construction, magnetic locking catch, rigid kickstands for fast deployment, and a 6-in-1 multi-adapter that plugs straight into the PEAK 3.6’s solar input. 1.5m hardwired output cable means you can position the panel for best sun without moving the power station.
Full SunFold 300 specifications and detailed feature breakdown available on its individual product page on our store.
Alternator charger: CHARGE-500 (500W DC-DC)
The DC-DC charger that turns engine hours into stored energy. Wires directly to your vehicle starter battery and converts the alternator’s 12V or 24V output to a clean 42V / 500W feed via standard MC4 connectors — up to 5× faster than charging from a 12V cigarette socket. Smart auto-detect kicks in only when the engine is running, protecting your starter battery. Compatible with 12V cars, vans, motorhomes and 24V commercial trucks. Fan-cooled aluminium chassis, mechanical isolation switch, fused 5m input cable.
Full CHARGE-500 specifications and installation overview available on its individual product page on our store.
How everything connects together
All three products use a common architecture — MC4 solar connectors — so they plug into the same input on the PEAK 3.6 with no adapters or extra hardware:
- SunFold 300: 1.5m hardwired MC4 cable + 6-in-1 multi-adapter (covers MC4 to XT60 for direct PEAK 3.6 connection)
- CHARGE-500: wired to vehicle battery on one end, MC4 output on the other — plugs into the PEAK 3.6 the same way as a solar panel
- PEAK 3.6 dual MPPT: two XT60 inputs accept simultaneous solar + CHARGE-500 connections without conflict
- Switching between inputs: Sherpa recommends an inline switch when running both solar and CHARGE-500 from the same input, so you can flick between sources without unplugging
Built for
- Vanlife & overlanding: charge while you drive, live off-grid, stay powered at every stop
- Motorhome & campervan owners: serious capacity without committing to a fixed-install lithium battery upgrade
- Remote professionals: field tools, lighting rigs, cameras, laptops — the trifecta of mains, solar and engine charging keeps everything running indefinitely
- Tradespeople: on-site power for the day, refilled from the van’s alternator on the drive home
- Marine & boating: integrated charging from solar, mains and engine alternator (motor vessels) without a fixed install
- Emergency preparedness: mains-charged for storage, but if the grid is down for days, solar and vehicle alternator give you indefinite reach
- Tiny homes & cabins: the PEAK 3.6 is portable enough to take with you, but expandable enough to grow with the cabin
What’s in this bundle
- 1 × Sherpa PEAK 3.6 Portable Power Station (3,072Wh / 3,600W)
- 1 × Sherpa SunFold 300 Portable Solar Panel (300W)
- 1 × Sherpa CHARGE-500 Smart Alternator Charger (500W DC-DC)
- All standard cables and accessories that ship with each product:
- PEAK 3.6: AC mains cable, vehicle adapter, MC4-XT60 cable, dual MC4-XT60 cable, crocodile clips, screwdriver, accessory pouch, manual
- SunFold 300: 6-in-1 multi-adapter cable, manual
- CHARGE-500: 5m fused 100A input cable, 0.5m MC4 output cable, mini screwdriver, manual
Optional accessories sold separately: PEAK 3.0-EB extra battery (for 6–15kWh capacity expansion), Sherpa Trolley (for one-handed wheeled mobility of the PEAK 3.6), additional solar panels (parallel two SunFolds via the dual MC4 cable for 600W combined input).
Important fulfilment, delivery & warranty information
To keep things fully transparent, this bundle is supplied and fulfilled by one of our trusted UK-based third-party partners. The components are not stocked directly at our own premises.
- Partner-fulfilled bundle: dispatched directly by the supplier from their own fulfilment operation
- Bundle dispatch: bundles typically ship together as a single delivery, but in some cases components may dispatch separately depending on supplier stock and pallet logistics — tracking details for each part will be provided once available
- Heavy-item delivery: the PEAK 3.6 alone is 36kg, so this bundle ships on a tracked heavy-parcel courier service. Please ensure you have appropriate access for the delivery
- 5-year manufacturer-backed warranty on the PEAK 3.6 and CHARGE-500; 2-year warranty on the SunFold 300. Warranty support, diagnostics and repairs are handled directly by Sherpa or authorised service partners as they are the product specialists
- Same-day dispatch where possible: Sherpa typically dispatches the same day on orders placed before 12pm where stock is held; UK delivery usually 3–5 business days depending on destination
- Support from us: if you experience any issue with any component, please contact us first — we will help coordinate the next steps with Sherpa where required
Your statutory rights under UK consumer law are not affected. Where applicable, we will continue to act as your point of contact for order-related queries, returns guidance and support coordination across all bundle components.