Battery Backup & Solar Storage
HOME BATTERY BACKUP & SOLAR ENERGY STORAGEReliable Power
When the Grid Goes Down
A home battery backup system can keep essential equipment running during a power outage, from refrigerators and lights to internet equipment, well pumps, and heating systems. When paired with solar, battery storage can also recharge from the sun and give you greater control over how your energy is used.
South Sound Solar designs battery backup systems for homes and businesses throughout Olympia and Western Washington. The right system depends on the battery capacity, the equipment you want to power, and how much stored energy you reserve for an outage.
Battery Backup Planning Tool
What could your battery keep running?
Choose a battery, the season, and the items you would want during an outage. We will estimate how long your stored energy could last.
This is a battery-only estimate. It shows what happens when your selected items are running only on stored battery power. Solar production and recharge are not included because they vary with weather, season, shade, and time of day.
Choose your battery system
Already have a battery? Select it below. Still planning? Compare different sizes and quantities.
Choose what you want to keep running
Basic essentials are included automatically because nearly every home needs them. Add anything else you would want during an outage.
Fine-tune your outage starting point
These controls let you test a more specific “what if?” situation.
Use the wattage label on the device when available.
How full is the battery when the outage begins?
Drag the slider left to test an outage that starts after some stored energy has already been used.
Loading live calculator…
Your estimated backup time
Choose at least one item above to see an estimate.
Your estimate details
Review the choices and assumptions behind the live estimate shown above.
Selected items: None yet
What this means
Choose the items you would want during an outage. The calculator will show how your choices affect the estimated backup time.
Battery-only estimate
This estimate excludes solar production and recharge. It shows how long the stored battery energy alone may last.
Every home is different. South Sound Solar can review your actual equipment, priorities and outage goals.
Talk with our local teamEstimates use average continuous loads and the selected battery model's stated conversion efficiency. Appliances and motors cycle and may briefly draw much more power. Results are educational estimates, not a guarantee of system performance or compatibility.
South Sound Solar Battery Backup Calculator · Version 1.3 · Updated September 9, 2026
Custom Proposals
Our solar sales specialists create a custom proposal based on your unique needs. We use professional shade analysis tools to find the ideal location for the array and if shading is an issue, we will discuss a ground mounted solar array. We will go over your budget, energy usage, and possible financing options. No 2 customers or solar arrays are the same and we want to make sure yours is right for you!
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