When it comes to backup power and blackout protection, choosing the right battery system is crucial. Whether you need whole-home backup or just want to keep critical circuits running, understanding the differences between Tesla Powerwall 3 and SigenStor can help you make the best decision.
Letโs compare them in two key areas:
โก Backup Power & Blackout Protection
๐ Battery Capacity & Scalability
โก Backup Power & Blackout Protection
๐น Tesla Powerwall 3
โ Designed for single-phase homes โ Works best in standard residential setups.
โ Limited three-phase support โ If installed in a three-phase home, it only backs up one phase, leaving the others unbalanced.
โ Additional costs for three-phase โ Requires extra inverters to balance phases.
๐น SigenStor
โ Single-phase & three-phase options โ More versatile for different home setups.
โ Full three-phase backup โ Keeps all circuits running during an outage.
โ Generator compatibility โ Can integrate with a generator for homes with frequent blackouts.
๐ Winner for Three-Phase Homes: SigenStor (if you need full backup power).
๐Battery Capacity & Scalability
How much storage do you need? It depends on your energy usage and future plans.
๐น Tesla Powerwall 3
โ Fixed capacity (13.5 kWh per unit) โ Can stack multiple units.
โ Current max: 54 kWh (4 Powerwalls).
โ Future expansion (2025): "Dummy" Powerwalls (battery-only) will allow stacking up to 16 units (216 kWh total).
๐น SigenStor
โ Modular design โ Start small (8 kWh) and expand up to 48 kWh per stack.
โ Unlimited scalability โ Multiple stacks can be combined for commercial-scale storage.
โ Great for gradual expansion โ Ideal if you want to add more storage later.
๐ Winner for Flexibility: SigenStor (if you prefer modular, scalable storage)
๐น Choose Powerwall 3 if:
โ You have a single-phase home.
โ You want Teslaโs ecosystem (e.g., solar + Powerwall integration).
โ Youโre okay with fixed increments of 13.5 kWh.
๐น Choose SigenStor if:
โ You have a three-phase home and need full backup.
โ You want modular, expandable storage.
โ You need generator compatibility for frequent blackouts.
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