Off-Grid vs. Grid-Tied Solar for Mobile Homes: Which Is Cheaper?
This is the most consequential decision in your solar planning, and the answer depends almost entirely on whether your mobile home is on a permanent lot with utility service or on a rural property without it.
Grid-tied systems — the majority of installations — send excess power back through net metering. They’re simpler, cheaper, and have payback periods of 7–12 years for most manufactured home owners. No battery required; the grid acts as your backup. The downside: you lose power during outages unless you add battery storage.
Off-grid systems are the right call for rural properties or any lot where grid hookup costs exceed $15,000–$30,000 — not unusual in remote areas. They require a battery bank, typically 10–20 kWh of LiFePO4 lithium storage for a single-wide, adding $8,000–$15,000 to system costs. The depth of discharge on lithium batteries (80–90%) gives roughly twice the usable capacity of lead-acid at the same rated kWh. NREL data shows off-grid systems become cost-competitive with grid extension when hookup costs exceed about $25,000.
For off-grid setups, pre-built kits simplify the process considerably. Pre-built off-grid solar kits from Shop Solar Kits range from 200W portable setups to complete 10kW manufactured home systems with battery and inverter included — use code WAYSENG101 at checkout for an additional discount.
Key components differ between approaches: grid-tied systems use a string inverter or microinverters with no battery required, plus net metering enrollment; off-grid systems require an MPPT charge controller, LiFePO4 battery bank, hybrid inverter/charger, and a backup generator for multi-day cloudy stretches. If you’re grid-tied and want to model net metering bill credits, use our solar net metering calculator.