RV Solar & Battery Sizer

A free, play-with-it calculator for sizing an RV solar and lithium battery system — starting from your actual appliance loads. Built by Lavender Mobile RV Solutions, mobile RV repair serving Santa Barbara County and the Santa Ynez Valley. It's an early preview of the solar & battery design service we're rolling out soon, so treat the results as a friendly ballpark, not a quote.

1Your loads

Pick your rig type to preload typical appliances, then edit the watts and hours/day to match how you actually camp. Toggle AC (runs through an inverter) vs DC (straight off the battery), or switch a load off if it won't run on solar power.

	Appliance	Watts	Hrs/day	Bus

2How you use it

System voltage

Days of autonomy days of low/no sun to cover

Peak sun hours Santa Barbara ≈ 5–6 summer, ~4 winter

Usable battery % % depth of discharge — lithium ~80

System efficiency % — controller, heat, wiring, angle losses

Panel size (est.) watts per panel, for the count

Recharges while driving (would add a DC-DC / alternator charger)

Your estimated system

Daily energy

0Wh

Peak draw

Battery bank

0Ah

Solar array

Charge controller

MPPT, minimum rating

Inverter

continuous

Want the real numbers?

This is a ballpark to get you thinking. A proper design accounts for how your appliances actually cycle, your roof space, wiring runs, and safe install — that's the part we do. Master Certified, mobile, and we come to you across Santa Barbara County & the Santa Ynez Valley.

805-755-8455

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