Is my house solar-ready? Five things to check first
Before you take the solar quote, here's what an electrician looks at, and what we'd want fixed before tying PV to your system.
A residential solar install is half PV and half electrical. The panels go on the roof. The interconnect, the new disconnect, the load center upgrade, and the backup-battery sub-panel: all of that lives inside the electrical system you already have. If that system isn't ready, you'll either get a higher quote, a smaller array, or a frustrated installer.
Here's what we look at when a homeowner asks 'am I solar-ready'.
1. The main panel
Most solar interconnects use the '120% rule': the busbar of your main panel can be loaded to 120% of its ampacity when the solar breaker is at the opposite end. So a 200A panel can usually take a 40A solar breaker. A 100A panel often can't. If your panel is a 100A or smaller, plan on a service upgrade.
Also: if your panel is a Federal Pacific Stab-Lok or a Zinsco, no solar company should be adding a breaker to it. Replace it first.
2. The service entrance
Even if your panel is sized right, your service drop from the utility might not be. A 200A panel fed by a 100A service drop is a real thing we see. The panel got upgraded, the wire from the pole didn't. Solar quotes will catch this; better to know now.
3. The grounding electrode system
Older homes sometimes have a single ground rod, no cold-water-pipe bond, and corroded clamps. Solar inspectors look at grounding closely because the new PV array becomes a grounded structure. Plan to bring the GES up to current code.
4. Critical loads: if you want battery backup
Battery backup doesn't power the whole house unless you spend a lot of money on a lot of battery. The cheaper, more honest path is a critical-loads sub-panel: fridge, internet, a few outlets, maybe the HVAC. That sub-panel needs to be built before the battery shows up. We can do that during the solar-readiness pass.
5. The roof and structural
Not our department, but worth saying: if your roof is 5+ years from a re-shingle, do the roof first or do it with the install. Pulling a 20-year array off a 5-year roof is expensive.
Our solar division: coming soon
Lightning Power Electric is launching a solar division in 2026. Same crew, same standards. If you're 6 to 18 months out from a PV install and want the electrical side ready, we can do a pre-solar readiness visit, document everything in writing, and stage the upgrades so your solar quote doesn't surprise you.
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