Complete solar power. One matched system.
Whole-home energy

Complete solar power. One matched system.

Shop reliable batteries, split-phase inverters and complete solar kits for backup, savings and off-grid living.

California inventoryFaster US delivery
Poland inventoryEuropean fulfillment
Certified equipmentUL, CE, IEC and UN38.3 options
Engineering supportSizing and after-sales assistance
Customer feedback
★★★★★
Fast answers, helpful system guidance and equipment that arrived carefully packed. Grandtech made the project much easier to plan.
Verified energy customer
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10kwh Powerwall Battery

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Free system sizing guide

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Quick system matchWhich energy setup are you planning?

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Typical starting range6–8kW inverter + 5–10kWh battery

A practical starting range for critical-load backup.

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Preliminary guidance only. Final sizing depends on measured loads, surge power, solar input, runtime target and local electrical requirements.

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Local inventory

Shorter lead times on both sides of the Atlantic

Selected US split-phase systems ship from California. European three-phase inverters and batteries are available from Poland.

CAUSA warehouseDomestic delivery
PLPoland warehouseEuropean fulfillment