Solar System Builder
Recommend a complete solar setup — battery, array, inverter, controller, or portable power station — from catalog specifications.
Open calculator →Off-grid solar planning platform
Plan your off-grid power system with confidence
Size batteries, solar arrays, inverters, and charge controllers from real catalog specs. SunPowerLogic turns baseline energy math into actionable equipment recommendations — not generic blog advice.
- 5
- Planning Tools
- 65
- Products
- 6
- Setup Guides
- 3
- Comparisons
Featured tool
Solar System Builder
Enter your use case, daily energy target, and build preferences. The builder sizes each component with the same planning math as our individual calculators, then selects the best catalog match for battery, solar, inverter, charge controller, or portable power station.
- Prefills from documented setup examples in the catalog
- Matches recommendations to published Wh, W, and amp specs
- Explains why each component was selected for your inputs
Interactive planning tools
Every calculator uses transparent baseline math and can surface catalog products that meet your sizing estimate — nothing is hard-coded.
Battery Runtime Calculator
Estimate how long a battery runs at continuous load, or calculate required capacity for a target runtime.
Open calculator →Solar Array Size Calculator
Convert daily energy use, peak sun hours, and efficiency into an estimated array wattage.
Open calculator →Inverter Size Calculator
Size continuous AC inverter output from peak load and a planning headroom factor.
Open calculator →Charge Controller Size Calculator
Estimate controller current from array wattage, system voltage, and a safety multiplier.
Open calculator →Popular setups
Documented baseline configurations for common off-grid use cases — with typical components and energy assumptions you can customize in the builder.
Sprinter Van
- Solar · Renogy 400W Monocrystalline Premium Kit
- Inverter · Renogy Inverter PUH 2000W Pure Sine Wave Power Inverter
- Power System · EcoFlow DELTA 3 Ultra Plus
Off-Grid Cabin
- Power System · EcoFlow Power Kits 4kWh Whole-Cabin System
- Power System · EcoFlow DELTA Pro 3
Sailboat
- Solar · 100W Flexible Solar Panel Kit
- Inverter · Renogy Inverter PUH 2000W Pure Sine Wave Power Inverter
- Power System · Jackery Explorer 1000 V2
Overland Truck
- Solar · Renogy 200W Portable Monocrystalline Solar Suitcase
- Inverter · Renogy Inverter PUH 1000W Pure Sine Wave Power Inverter
- Power System · Jackery Explorer 2000 V2
Golf Cart
- Solar · 100W Flexible Solar Panel Kit
- Power System · Anker SOLIX C1000 Gen 2
Featured Guides
Latest editorial buying guides that connect sizing math to real equipment decisions for vans, RVs, cabins, and marine builds.
Buying GuideEditorial
Best Lithium Batteries for RVs (2026)
Compare 12V LiFePO4 RV batteries using published catalog specifications, planning tools, and head-to-head comparisons — without treating any single amp-hour label as a universal fit.
Read Guide →ComparisonEditorial
1000W vs 2000W Inverter for an RV or Camper Van
Compare Renogy 1,000 W and 2,000 W pure sine inverter continuous output and surge notes for RV and camper van planning.
Read Guide →TutorialEditorial
200Ah vs 300Ah Lithium Battery for an RV: How Much Capacity Do You Need?
Compare 200 Ah and 300 Ah lithium battery planning at the same nominal voltage and learn when each capacity tier may make sense for RV energy use.
Read Guide →Buying GuideEditorial
Best Portable Power Station for a Sprinter Van: What the Numbers Say
Compare portable power station battery capacity and AC output against a Sprinter Van sizing example to see which listed models meet, partially meet, or fall below the estimate.
Read Guide →TutorialEditorial
Is a 300Ah Lithium Battery Enough for Van Life?
See how a 300 Ah 12 V lithium battery compares to a Sprinter Van amp-hour planning estimate and what still depends on real loads and charging.
Read Guide →ReviewEditorial
Renogy 300Ah Battery for RV and Van Life: What the Specs Mean
Understand the listed specifications on the Renogy 300 Ah lithium battery and how they relate to RV and van battery-bank planning.
Read Guide →Product categories
Browse the catalog by equipment type. Every listing links to published specifications used in SunPowerLogic sizing and recommendations.
Batteries
10 active products
Solar Panels
7 active products
Inverters
5 active products
Charge Controllers
12 active products
Portable Power Stations
10 active products
Why trust SunPowerLogic
Recommendations are planning aids built on documented assumptions — not sponsored picks dressed up as engineering advice.
Published specifications
Product matches come from the active SunPowerLogic catalog — amp-hours, watt-hours, continuous output, and controller ratings tracked from manufacturer listings.
Transparent calculations
Solar, battery, and inverter requirements use documented formulas with visible inputs. You can see the math behind every sizing estimate before choosing equipment.
Independent guidance
Setup examples and buying guides explain trade-offs without treating one brand as the default answer. Compare options against your own load list and charging reality.
How SunPowerLogic works
Baseline planning methodology used across setup examples, calculators, and product comparisons on this site.
- Estimate daily energy demandEach setup uses a documented baseline Wh/day assumption for a typical example configuration.
- Calculate system requirementsSolar, battery, and inverter needs are estimated from sun hours, efficiency, and load assumptions.
- Compare listed equipmentSunPowerLogic compares published product specifications against the baseline sizing estimates for each setup.
Calculation formulas
Solar requirement
Daily Energy ÷ (Sun Hours × System Efficiency) → Solar Array Requirement
Battery requirement
Daily Energy ÷ Usable Battery Fraction → Battery Capacity Requirement
Inverter requirement
Peak AC Load × Surge Margin → Inverter Capacity Requirement
These are planning estimates, not professional electrical designs. Always verify sizing for your specific loads and installation.