VAN POWER BUILDER

Off-grid power, designed around your van.

Tell us how you travel and what you want to power. We’ll build an indicative SkyEnergi + SRNE system around your real-world usage.

Explore SRNE range

Planning tool only. Final cable, fuse, protection and installation requirements must be checked for your specific vehicle.

Build your SkyEnergi power system
Step 1 of 7

What are you building?

Vehicle size helps us make sensible recommendations around battery format, charging and available space.

How do you use the van?

This tells us how much battery reserve to build in between opportunities to recharge.

2 nights
We’ll use this as a reserve target, then show how solar can extend it.

Build your daily power use

First tell us whether you want 230V mains-style power away from hook-up. That choice determines whether the system needs an Inverter Charger. Then add the appliances you actually use so we can calculate the battery demand.

Choose Yes or No before continuing. This is the main Inverter Charger requirement question.
For intermittent appliances, enter the approximate total run-time across the whole day rather than the time they are switched on at the wall.
0WhBattery energy / day
0Wh12V / DC loads
0Wh230V battery-side use
0AApprox. peak battery draw

The calculation applies a 92% inverter efficiency allowance to 230V loads and includes a small daily system-overhead allowance for controls, relays and standby consumption.

How much battery reserve do you want?

Now turn your daily appliance use into an actual battery-bank target. We combine your off-grid duration with a reserve margin, then show the minimum calculated capacity before the SkyEnergi product recommendation is applied.

15%
15% is a sensible planning buffer. Increase it if you prefer more margin for poor weather, unexpected loads or battery longevity.
Live battery calculation
0Ah

Indicative minimum battery-bank capacity before charging sources and SkyEnergi product/BMS constraints are considered.

0.00kWhStored energy target
0APeak DC draw
15%Capacity held in reserve

How will you recharge?

The charging architecture changes depending on whether you need off-grid 230V power. If an Inverter Charger is required, the SRNE MD1250 or MD12100 manages alternator and solar charging while the Inverter Charger handles hook-up charging. If no Inverter Charger is required, the SRNE SAA1250 3-in-1 combines alternator, solar and 230V hook-up charging in one unit. We also use your normal driving time to estimate how much energy the DC-DC charger can put back each day.

For conservative sizing we calculate Rarely as 0 hours, 1–2 hours as 1 hour, and 3–4 hours as 3 hours of DC-DC charging per day. Actual charge rate varies with alternator output, battery state of charge, temperature and system limits.
Fit check uses the stated rectangular roof size and allows a 20mm gap between two panels. Rooflights, vents, rails, curvature and required mounting clearance can reduce the real usable area.
For planning, solar yield is estimated from panel wattage × 4 peak-sun-hours × 75% system efficiency. Solar package prices shown are panel-only; brackets, solar cable, connectors and protection are included in the installation hardware allowance below. With an Inverter Charger, MD1250 supports up to 700W PV and the 730W package steps up to MD12100. Without an Inverter Charger, SAA1250 is the all-in-one alternator + solar + AC charging solution up to 700W PV on 12V.
0WhEstimated DC-DC/day
0WhEstimated solar/day
0WhNet daily battery demand
0AhCalculated capacity
0APeak battery draw

How much control do you want?

Every recommended core component already gives you solid power management. The SRNE ecosystem can add central touchscreen control, accurate shunt monitoring and connected switching.

This slightly changes how aggressively the tool steps up battery capacity.

Ready to build your recommendation?

We’ll combine your appliance-by-appliance energy calculation, autonomy, reserve target, charging sources and peak load into an indicative SkyEnergi / SRNE system.

Daily demand
Peak 230V load
Solar selected
Calculated capacity

The result is a planning recommendation, not an installation specification. Cable cross-sections, fuse sizes, isolators, earthing, AC protection, battery mounting, PV arrangement and vehicle-specific requirements must be verified before purchase or installation.

Your recommended build

SkyEnergi Touring System

A balanced system for regular off-grid touring.

230Ah
SkyEnergi Core2 230AhDimensions: 384 × 194 × 255mm (L × D × H)Sized for your daily energy use and inverter charger demand.
0WhEstimated daily use
0WhFair-weather solar/day
0WhDC-DC recovery/day
0 daysIndicative autonomy*
Final installation should be checked by a competent installer.
Email this build to SkyEnergi

*Autonomy is an indicative energy balance only. The load calculator applies 92% inverter efficiency to 230V loads, a small system-overhead allowance, estimated solar yield based on 4 peak-sun-hours at 75% system efficiency, and a conservative DC-DC recovery estimate using the lower end of the selected driving-time range. Real performance varies with season, location, shading, alternator output, battery state of charge, temperature, travel pattern and appliance use. Prices shown are indicative including VAT at time of build and may change. The installation hardware figure is an allowance, not a fixed kit price; labour is not included.

SkyEnergi Core2 lithium105Ah to 680Ah, with Bluetooth monitoring and integrated heat-pad options across the Core2 range.
Smart charging architectureMD1250 / MD12100 with an Inverter Charger, or SAA1250 3-in-1 when no Inverter Charger is required.
230V mains chargingRIC12 Inverter Charger when off-grid 230V is needed; otherwise the SAA1250 provides integrated AC hook-up charging with no separate AC charger.
UK supportTalk through the result with SkyEnergi before ordering and turn the recommendation into a vehicle-specific bill of materials.