Comprehensive Solar & Battery FAQ

Solar PV turns sunlight into DC electricity, then an inverter converts it to AC power your home/business uses. When production exceeds usage, energy can charge a battery (if installed) and/or export to the grid depending on your interconnection rules.

kW is power (how fast energy can be delivered). kWh is energy (how much is stored or used over time). Think of kW as “faucet size” and kWh as “tank size.”

Not by itself on a standard grid-tied system. For safety, grid-tied solar must shut off when the grid is down. To have power in an outage, you need a backup-capable inverter and typically battery storage (or a generator integration).

Modern panels are built for long service life. Production slowly degrades over time, but quality panels commonly carry long-term performance warranties. Longevity depends on product quality, installation quality, and the roof interface.

If your roof is near end-of-life, it’s usually smart to address it before or with solar. The roof is the foundation. We’ll review roof type and condition and recommend the cleanest approach.

See roof-type installation approaches →

Often yes — but the best modern value comes from solar + storage designed for self-consumption. With many rate structures, exporting energy is not as valuable as using it or storing it for evening peak hours.

Time-of-Use (TOU) rates charge different prices depending on the time of day. In many areas, evenings are the most expensive. Batteries let you store daytime solar and use it later when rates are higher.

A practical strategy:

• Use solar to offset daytime loads
• Charge the battery from solar (and sometimes from grid when beneficial/allowed)
• Discharge the battery during expensive peak windows
• Keep a reserve for outages if you want backup

The “best” settings depend on your utility, rate plan, and lifestyle loads.

Oversizing can help if you expect future load growth (EVs, heat pumps, ADU), but interconnection rules, roof space, and export economics matter. We typically design for your next 10–20 years, not just last year’s bill.

Usually yes. Even with solar, most customers have some fixed charges and may import at night or during long cloudy periods. Storage reduces imports and can reduce peak costs dramatically, but “zero bill” depends on usage and rules.

• Backup: keeps critical loads (or whole home) running in outages
• TOU savings: shifts energy into expensive hours
• Demand control: reduces high-power spikes (especially important commercially)
• Power quality: can smooth short events depending on configuration

Critical loads backs up selected circuits (fridge, lights, outlets, Wi-Fi, medical devices). Whole-home aims to carry most or all loads (including larger loads like HVAC), which requires higher inverter power (kW) and more battery (kWh).

We size batteries based on:

• kW (how much power you need at once) — large loads require more inverter capacity
• kWh (how long you need it) — “hours of runtime” depends on total energy
• Your outage goals: lights & fridge vs whole home vs “ride through multi-day events”
• Your TOU strategy: how many hours of peak you want to cover
• Seasonality (winter solar production is lower)

LFP (Lithium Iron Phosphate) chemistry is widely recognized for strong thermal stability and longevity compared to some other lithium chemistries. In real-world deployments, LFP has become a preferred choice for home storage due to safety profile and cycle life.

We’ve had strong success with the Sol-Ark 15kW platform paired with Briggs & Stratton batteries for whole-home style systems. The reason: high inverter power, flexible configuration, and robust performance in the field.

Read the storage overview →

Often yes, but local rules matter. In many LA County jurisdictions, indoor/garage battery installations may require additional safety measures. In practice this can include commercial-grade heat / thermal detection and other fire-safety details depending on the AHJ (Authority Having Jurisdiction).

We design to the adopted code and local amendments, and we communicate the requirements clearly in the permit set.

It depends on your loads. A battery lasts much longer if you back up essentials only. Large loads (HVAC, electric ovens, pool pumps) can drain storage quickly unless the system is sized accordingly.

We can model realistic scenarios: “lights + fridge + Wi-Fi,” “critical medical,” or “whole home.”

True off-grid means you can operate without the utility at all times, including winter, storms, and multi-day cloudy periods. That requires:

• Enough solar to cover the worst month (often winter)
• Enough battery to ride through nights and low-sun periods
• Load management (you cannot run everything all the time)
• Often a generator as a reliability layer, depending on risk tolerance

Solar production is lower in winter (shorter days, lower sun angle, more storms), while many loads go up (heating, longer lighting hours). Off-grid designs succeed when they are sized for the worst period, not the average month.

Yes — many clients want high self-sufficiency while staying grid-connected for rare extremes. This can look like: solar + storage covering daily life, with the grid as a fallback safety net.

Typically yes. Off-grid capable inverters and system architecture must support islanded operation, battery charging logic, load management, and sometimes generator integration. The design is more like a microgrid than a standard rooftop solar project.

It depends on roof layout, shading, and goals. There are multiple architectures (string, optimized string, microinverters, hybrid inverters). The “best” inverter is the one that fits your site and your operating goals (backup, TOU strategy, future expansion).

Shade matters. The impact depends on when the shade occurs (morning vs afternoon) and system architecture. We factor shading into the layout and can recommend equipment strategies to reduce shade losses.

Most modern systems have monitoring apps that show production, consumption, and (if applicable) battery charge/discharge. We also recommend simple sanity checks: compare monthly production trends to seasons and look for sudden drops.

A properly installed system should not damage your roof. The risk comes from poor attachment and poor waterproofing. ABC Solar puts roof interface craftsmanship at the center of the design.

Yes. Solar PV and battery storage typically require building/electrical permits and inspections. We prepare the permit plans, submit, respond to plan check, and coordinate inspections.

In California, HOAs generally cannot unreasonably restrict solar installations. There are rules that protect your right to install solar while still allowing reasonable aesthetic guidelines.

Read our Solar Rights Act guide →

• Older panels/services requiring upgrades or load calculations
• Complex roof structures or structural engineering needs
• Battery installations with special local amendments
• Utility interconnection timelines

We reduce delays by submitting complete documentation and responding to corrections cleanly and quickly.

Sometimes. Light dust is normal; heavy dust, ash, or bird activity can reduce output. Most homeowners only need occasional cleaning based on site conditions.

• New shading (tree growth)
• Inverter or optimizer fault
• Tripped breaker or disconnect
• Monitoring/communication issues that “look” like low production
• Soiling in unusual environments

Modern sealed battery systems are largely maintenance-light, but they do require good installation conditions: correct clearances, ventilation requirements as applicable, and proper firmware/monitoring configuration.

First check if there’s a neighborhood outage. Then check the AC breaker, any system disconnects, and whether your Wi-Fi changed. If you’re unsure, call us — we can usually diagnose quickly.

Many commercial bills include kW demand charges (a fee based on your highest power draw). A battery can shave those peaks by discharging during spikes, often creating savings that solar alone cannot.

Peak shaving is using a battery (and controls) to reduce the facility’s highest kW draw during a billing period. Even a short spike can drive demand charges, so batteries can pay by preventing those spikes.

Many California programs and certain project types require prevailing wage compliance. ABC Solar designs and builds commercial work with prevailing wage in mind where it is required by the project/program/regulator.

• 12–24 months of interval or monthly usage data
• Rate schedule (including demand charge structure)
• Single-line diagram / service details (if available)
• Roof/yard space photos and any structural info
• Operating schedule and critical loads

• Recent electric bill(s) or usage history
• Address and photos of the roof and main electrical panel
• Your goals: bill reduction, backup, off-grid capability, EV, ADU, future expansion
• Any HOA constraints or special site details (tile roof, steep pitch, flat roof, etc.)

Phone: 1-310-373-3169

Email: [email protected]

If you email, include your address and a copy of your latest electric bill. If you’re considering storage, tell us whether you want critical loads or whole-home backup.