Solar batteries — store the sun, use it after dark.
Lithium battery storage transforms a solar system from daytime-only generation into 24/7 self-consumption + backup power. Comstel installs Tier-1 lithium batteries — sized to your evening load profile, with full backup capability for critical loads.
Six reasons businesses add storage to their solar.
Solar without battery sends excess generation to the grid at low feed-in tariffs. A battery captures that surplus for your own evening use — at full retail electricity prices.
Higher Self-Consumption
Use 80-90% of generated solar instead of 30-40%. The economics improve dramatically.
Backup Power
Critical loads run during grid outages — POS systems, freezers, IT, security. Auto-transfer in under 10 seconds.
Peak Tariff Shaving
Avoid the 3-9pm peak tariff window by discharging from battery — significant savings on commercial bills.
Demand Charge Reduction
Battery can shave peak demand and reduce demand charges, which are often the largest line item.
Virtual Power Plant
Earn revenue by joining a VPP — your battery exports to the grid during peak events.
Future-Proofing
Tariff arbitrage value keeps growing. Locks in self-consumption value for 10-15 years.
Is a battery right for your business?
Free assessment models your evening load and shows whether storage will pay back — including backup-power value.
Six things to know before adding storage.
Batteries are a big-ticket purchase. These are the topics that determine whether you'll be happy with it — talk to us about the specifics for your site.
LFP vs NMC
Most modern commercial batteries use lithium-iron-phosphate (LFP) — safest chemistry, non-flammable, longest cycle life. We avoid older NMC chemistries for new installs.
- LFP — safe + long-life
- Non-flammable chemistry
- 6000+ cycle ratings
- 10-year warranty standard
Right-Sized, Not Oversized
Most businesses oversize batteries. We model your actual evening load and right-size — saves thousands without losing the benefit.
- Based on actual usage
- Avoid oversizing waste
- Right-sized payback
- Stackable for growth
Critical Loads Selection
Decide which circuits stay powered during an outage — POS, refrigeration, IT, lighting. Designed at install.
- Selected-load backup
- Whole-of-site backup option
- Critical-load circuits
- Auto-transfer switching
Stack as You Grow
Modern battery systems are modular — start with 5-10kWh and add more later as needs grow or budget allows.
- Stackable modules
- Start small, scale
- Same-system expansion
- No replacement needed
When to Charge / Discharge
AI-driven controllers learn your usage and tariff structure — automatically optimising when to charge from solar, when to discharge to loads or grid.
- AI-based learning
- Tariff-aware dispatch
- VPP-ready
- Demand-charge logic
AS/NZS 5139 Compliance
Australian Standards AS/NZS 5139 governs battery installation — clearances, ventilation, fire suppression. Comstel installs to spec, every time.
- AS/NZS 5139 compliant
- Proper clearances
- Ventilation specified
- Certified installer
Get a battery sizing & payback report.
Free assessment models 5/10/15-year economics for your specific business — so you can decide based on numbers, not sales pitches.
FAQs
How big should my battery be?
How long does a solar battery last?
Does the battery provide backup power during outages?
How much can I save with a battery?
Are solar batteries safe?
How do I get started?
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Solar at night, backup during outages.
Free assessment to size the right battery for your evening load profile. Tier-1 brands, 10-year warranty.
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