Off-grid power · Compatibility & price intelligence
A panel isn't "12 volt" — it's compatible with a controller, at a bank voltage, at your coldest morning. We run that calculation properly, publish the working, and price every part across every merchant, including the ones we earn nothing from.
We work hard to be right every time — but electrical work carries real risk. Always verify specifications against the manufacturer's datasheet, and confirm your design with a qualified electrician, before you buy or wire anything.
Try clearing a brand or toggle, or another bank voltage or category.
How we verify
Open-circuit voltage rises as temperature falls. A string that's safe in July can exceed a controller's input ceiling on a January morning and destroy it at first light. We compute Voc at your coldest expected temperature — using the module's published coefficient where it exists, and NEC Table 690.7(A) where it doesn't.
"12V panel" is legacy marketing. Whether a panel works with your bank is decided by the controller between them — a 47V Voc module runs a 12V bank perfectly well through the right MPPT. We judge the panel–controller–bank relationship, never the panel alone.
The same controller accepts a bigger array at a higher bank voltage — a Victron 100/30 takes 440W at 12V and 880W at 24V. Every wattage ceiling we quote is the one for the bank you actually selected.
A component missing the figures needed to judge compatibility isn't marked compatible or incompatible — it's marked unverified, and it's held back from filtered results with the count shown. Silence beats a wrong yes.