A U.K. homeowner exploring solar options received a £10,761 (~$14,247 USD) proposal, but Redditors said the bigger issue was what the quote left out.
Specifically, commenters pointed to missing inverter details, which could determine whether the system actually delivers the savings and flexibility the buyer wants.
Here's what to know
The homeowner wasn't just looking at panel count or price — they wanted a setup that could store cheap overnight electricity and use it later in the day. In a post on Reddit's r/SolarUK, they said Octopus had quoted £10,761 (~$14,247 USD) for 10 panels, a 10-kilowatt-hour Fox battery, and a 25-year warranty, writing, "Along with the solar I'd like to charge the battery using the off peak rate and utilise it during the day."
Most responses said that plan should be possible. Still, commenters emphasized that the answer depends on the exact equipment being installed.
One commenter replied, "Yes, you should be able to charge the battery during off-peak times and then run the house load of the same," but added that installers should "clearly mention the make, model and capacity of the inverter."
Others said they would not move ahead without more technical detail.
"I wouldn't commit to a system without seeing the full specs," one commenter wrote.
Another said the missing inverter information "matters a lot, and depends on what you want and what you want it to do."
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Several users also suggested looking beyond the Octopus offer before deciding. One commenter said Octopus has "a pretty poor reputation as a solar installer" and recommended getting "at least 3 quotes" from well-reviewed local installers with long track records.
Homeowners in the U.S. can try EnergySage to get free solar installation estimates and compare quotes.
More background
A solar quote can look appealing at first glance, but the inverter is a key component that helps determine how power flows among the panels, battery, home, and grid.
The homeowner was already on a tariff with steep overnight discounts, so the ability to fill the battery cheaply at night and use that stored power during the day could improve the system's return on investment.
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A commenter also flagged a drawback of some all-in-one battery setups: "If something goes wrong after the warranty expires, you'd have to replace the entire thing" rather than swapping out a single failed module.
What can be done?
For U.S. homeowners, EnergySage can make that process easier. With EnergySage's help, the average person can save up to $10,000 on solar purchases and installations. EnergySage's solar map shows the average cost of a home solar panel system on a state-by-state level, as well as details on solar panel incentives for each state. Together, these resources can help homeowners get the best price for rooftop solar panels and access available incentives.
Adding battery storage to a solar setup is one of the best ways to protect your home during outages, save money on energy, and go off-grid. Homeowners who want to compare battery brands, backup features, and competitive installation estimates can explore EnergySage for information about home battery storage options.
Where can I learn more?
• A solar industry employee urged buyers to educate and protect themselves before signing contracts.
• EnergySage's COO broke down solar panel costs for homeowners comparing installation bids.
• An energy expert warned that too good to be true solar offers can hide costly terms.
• Reddit homeowners said they haven't paid more than 20 for monthly power in years.
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