Battery, Solar & Off-Grid Experts in Eugene, OR
Build your own off grid energy system with Mac's Batteries. Shop off grid components, off grid DIY parts, batteries, inverters, chargers, and solar gear for reliable energy systems.
What We Carry
Over 40 lead-acid group sizes in stock, lithium for every need, commercial and industrial batteries, and solar equipment to keep your life charged.
Automotive Batteries
Cars, trucks, motorcycles, golf carts, and heavy equipment. Top-tier maintenance-free batteries in 40+ group sizes.
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RV & Marine
Deep-cycle and lithium batteries for RV renovations, van conversions, bus builds, trailers, boats, and off-grid boondocking. Drop-in lithium conversions available.
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Lithium Batteries
LiFePO4 and Li-ion from 12V to 48V. Custom builds from portable packs to whole-home Powerwalls. New and used options.
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Solar Panels
New and used solar panels, charge controllers, inverters, and complete off-grid systems. Solar classes available — beginner to advanced.
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Commercial Batteries
GC-2, 31 Stud, 31 Post, 4D, 4DLT, and 8D batteries for forklifts, scissor lifts, pallet jacks, bulldozers, snow plows, and fleet equipment.
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System Components
MPPT controllers, inverters, chargers, shunts, fuse panels, wiring, and mounting hardware for complete off-grid and mobile power systems.
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Golf Cart Batteries
6V, 8V, and 12V flooded and lithium golf cart batteries. Trojan-style replacements and custom lithium conversions for extended range.
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Motorcycle Batteries
AGM and lithium batteries for motorcycles, ATVs, dirt bikes, scooters, and powersports. Most sizes in stock and ready same day.
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Real off-grid and lithium systems we've put together — photos and component lists from actual builds.
12V Off-Grid Starter Build
A reference board we use to walk customers through what a complete 12V off-grid system looks like — inverter, DC-DC charger, MPPT controller, bus bars, fuse block, and disconnect, all wired together.
RV Whole-Coach 3000W Build
A 12V RV build sized to run the entire coach — a 3000W Renogy inverter, a 900Ah LiFePO4 bank across three 300Ah batteries, a 100A charging system, dual AC transfer boxes, distribution bars, and heavy Temco cable throughout.
DIY Portable Packout
A compact, portable 12V power pack built by one of our DIY customers — a 300Ah Bluetooth LiFePO4 battery, Renogy shunt and distribution bars, a 40A charge controller, and a 2000W Renogy inverter, all packed into a rugged, grab-and-go tool case.
12V Truck Bed Portable Build
A simple, portable 12V truck bed build — a 300Ah battery, a 30A LiFePO4 charger, a Renogy 40A DC-DC charger off the alternator, a fuse, and a disconnect switch, mounted on a board that sits right in the bed.
Japanese RV Upgrade
A 12V power system upgrade for a Japanese-import RV — a 300Ah Bluetooth battery, distribution bars, a safety switch, a Renogy 2000W inverter with transfer switch, a 55A LiFePO4 charger, and an AC transfer box, all fit into the coach's under-floor compartment.
VW Van Conversion
A 12V power system build for a classic Volkswagen van conversion — a 200Ah Bluetooth BMS battery, an EPEVER MPPT solar charge controller, a Renogy 20A DC-DC charger, a Renogy 1000W inverter, and a Blue Sea fuse block, all wired into the van's cabinetry.
Are You a DIY Person? Let's Build Your Off-Grid Solution
Renovating a van? Converting a bus? Installing solar on your RV or home? Bring your vehicle, power goals, or parts list and we'll work through your DIY off-grid project together.
Solar System Components
Core gear, installation hardware, and safety/protection parts for complete off-grid and mobile power systems.
Core Systems
Installation Hardware
Free Battery & Alternator Testing
Walk in during business hours. We'll test your battery and alternator at no charge — and if your battery needs replacing, we can install a new one for you right on the spot.
DIY Off-Grid Energy Systems
Build your own off-grid solar or power system with our help. Custom setups for DIY off-grid projects, RV conversions, van life, home backup. Inverters, charge controllers, micro-hydro, wind, and custom cables — we guide and build it with you.
Battery Recycling
Over 95% of lead batteries are fully recyclable. Bring us your old batteries — we'll make sure they're recycled the right way.
Wondering About Lithium?
Lithium batteries last 3–5× longer than lead, weigh 1/3 as much, and offer far more usable capacity. Our 12V 100Ah and 170Ah LiFePO4 drop-in replacements for Group 24/27 come with Bluetooth BMS for easy monitoring.
- ✓ Built to last 10+ years
- ✓ Bluetooth BMS (iPhone & Android) for monitoring
- ✓ Much lighter — same charging system as lead (LiFePO4)
- ✓ Charges significantly faster than lead
- ✓ New, used/tested, off-the-shelf, and custom builds
Quick Comparison
| AGM Lead | Lithium | |
|---|---|---|
| Lifespan | 3–5 years | 12–15 years |
| Weight | Heavy | 1/3 the weight |
| Usable Capacity | ~50% | ~95% |
| Upfront Cost | Lower | Higher |
Solar Panels & Classes
We stock new and used solar panels — all used panels are fully MPPT tested. Mac's also hosts solar classes from beginner to advanced. Come learn the basics of DIY off-grid solar to power your life, your van life, your RV, or your custom project. Call and get signed up today!