Premium Cross-Brand (400W / 200Ah Battle Born / Victron)

A buy-it-once build using the most-trusted names in each category: Renogy panels, a Victron MPPT and Orion DC-DC, Battle Born batteries and a Samlex pure-sine inverter. More expensive, but the components with the deepest reliability track records.

System

12V

Solar array

400W

Usable storage

2,400Wh

Runtime / charge

38.4h

Parts total

$3,448

! Works — with one caution

Parts list

Part	Qty	Price	Why this pick
panel Renogy Renogy 200W 12V Monocrystalline Rigid Solar Panel	2×	$380	Best dollars-per-watt rigid pick for mid-size builds, fewer panels and connections than equivalent 100W modules.	Buy at Renogy →
charge controller Victron Energy Victron SmartSolar MPPT 100/50	1×	$290	50A Victron for mid-size 12V arrays where 30A would clip; same premium app ecosystem.	View Victron Energy listing ↗
battery Battle Born Batteries Battle Born 100Ah 12V LiFePO4	2×	$1,898	Benchmark premium LiFePO4 for serious RV/van builds where reliability and warranty matter more than cost.	View Battle Born Batteries listing ↗
inverter Samlex America Samlex PST-2000-12 Pure Sine Wave Inverter	1×	$600	Premium PST-series PSW prized for clean output, reliability, and continuous-duty rating in demanding RV/marine installs.	View Samlex America listing ↗
DC-DC charger Victron Energy Victron Orion XS 12/12-50A DC-DC	1×	$280	Most efficient 50A DC-DC available; integrates cleanly with Victron VictronConnect ecosystem.	View Victron Energy listing ↗
System total		$3,448	Parts only — wire, fuses, mounts and breakers extra.

Affiliate disclosure: Some links here (Renogy) are affiliate links — if you buy through them we may earn a commission at no extra cost to you. It never changes which part we recommend: picks are ranked by spec fit across every brand, and non-Renogy parts are listed with neutral source links. Sizing and wiring output is guidance, not an electrical sign-off — verify before buying or wiring.

Compatibility checks

✓ System voltage: All components agree on a 12V system.

✓ Panel ↔ Controller: Your 400W array stays under the 100V PV limit (24.7V ×1.25 cold = 31V per panel; up to 3 in series).

✓ Controller ↔ Battery: Controller charges a 12V bank and tapers correctly for lithium/AGM profiles.

! Inverter ↔ Battery: 2000W needs ~189A from the bank; the bank's 200A is enough but with little margin — fine for intermittent loads, tight for sustained max draw.

Wire & fuse starting point

Run	Max current	Wire (AWG)	Fuse / breaker
Solar array → Charge controller	19A	12 AWG	25A
Charge controller → Battery	50A	6 AWG	80A
Battery → Inverter	185A	4/0 AWG	250A
Alternator / DC-DC → Battery	50A	6 AWG	80A

Wire and fuse sizes are a conservative starting point from each run's max current (×1.25). Run length, temperature and local code can change them — confirm with an electrician. Off-grid DC carries real fire and shock risk.

Deliberately cross-brand to show the planner's neutrality. The 200A Battle Born bank covers the Samlex 2000W inverter's ~190A peak.

Tune this build in the planner →

FAQ

Is the premium price worth it over the Vanlife Essentials build?

For full-timers and resale, often yes: Battle Born and Victron have the longest field track records and the best support/warranty, and Victron's app ecosystem is excellent. For occasional use, the mid-tier build does the same job for far less.

Why mix brands instead of going all-Victron or all-Renogy?

Because no single brand makes the best part in every category. This is the point of a cross-brand planner: Renogy panels are a great value, Victron leads on controllers and monitoring, Battle Born on batteries. They're all standard 12V components and interoperate fine.

Three days of autonomy — how?

200Ah of Battle Born is ~2,400Wh usable, about 1.6 days at 1,500Wh/day on its own. The extra autonomy comes from 400W of solar plus alternator charging keeping the bank topped, so a cloudy stretch doesn't drain you flat.

Build vetted 2026-06-21 · confidence: high. Prices and specs from each part's linked sources.